--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi David,
>
> Those motors can each handle peak current of 16A.  With a 70V supply that is about 1100watts.  Just to give you some idea this is about 1.5HP.  But again it depends on what your application really needs.  By setting your acceleration lower you will draw less power.  I would suggest starting with something like a 70V 600W unregulated supply to power both motors.  Later you could add another if needed.  A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth.
>
>
> Regards
> TK
>
>
>
> ________________________________
> From: daveymahomh600e <david.m.stevenson@...>
> To: DynoMotion@yahoogroups.com
> Sent: Tuesday, October 9, 2012 2:02 PM
> Subject: [DynoMotion] Re: Help With a Complete System
>
>
>  
> Hi Tom,
>
> 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs?
>
> Thanks very much,
> David.
>
> --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> >
> > Hi David,
> >
> > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts).
> >
> > When a motor turns it acts like a generator with the higher the speed the higher the voltage.  This parameter tells us that at 1000RPM it will be generating 57.5V.  The supply voltage has to be higher than this to be able to put energy into the motor.  So basically with a 70V power supply you will be limited to around 1000RPM.  You need to determine if this is fast enough for your application.  Otherwise you will need to go with another amplifier that can work at a higher voltage.
> >
> > Regards
> > TK
> >
> >
> >
> >
> >
> >
> > ________________________________
> > From: daveymahomh600e <david.m.stevenson@>
> > To: DynoMotion@yahoogroups.com
> > Sent: Tuesday, October 9, 2012 1:45 PM
> > Subject: [DynoMotion] Re: Help With a Complete System
> >
> >
> >  
> >
> >
> > Hello Tom,
> >
> > Your reply was very helpful. Thank you.
> >
> > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested.
> >
> > Here are the specs for the servo...
> > Model Number BSM80C-375
> > Continuous Stall Torque
> > lb-in 31.9
> > N-m 3.6
> > Continuous Current amps 6.29
> > Peak Torque
> > lb-in 95.6
> > N-m 10.8
> > Peak Current amps 16.0
> > Thermal Resistance °C/watt 1.0
> > Thermal Time Constant Min 28
> > Mechanical Time Constant msec 2.7
> > Electrical Time Constant msec 3.73
> > Rated Speed @300 volts rpm 4000
> > Rated Speed @600 volts rpm 8000
> > Electrical
> > Torque Constant
> > lb-in/amp 6.0
> > N-m/amp 0.67
> > Voltage Constant
> > Vpk/krpm 57.5
> > Vrms/krpm 40.7
> > Resistance ohms 2.2
> > Inductance mH 8.2
> > Mechanical Inertia
> > lb-in-s2 0.00497
> > Kg-cm2 5.53
> > Maximum Speed rpm 10,000
> > Number of Motor Poles 4
> > Weight lbs/Kg 13/5.9
> >
> > Does everything look okay to you?
> >
> > Thanks for the power supply links.
> >
> > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here.
> >
> > Thanks again,
> > David.
> >
> > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> > >
> > > Hi David,
> > >  
> > > I'm sure you will have no trouble with the C and we can help.  It mostly involves cutting and pasting and changing parameters.
> > >  
> > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.  You must keep the peak supply voltage less than 80V with SnapAmp.  So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.  And basically the more power the better.  You might consider starting out with something like a low cost and lower voltage 48V 300W regulated supply.  Meanwell sells them for about $60.  Running at lower voltage will limit your max speed.  Lower power will limit your max acceleration.  Once everything is working you can go to higher voltage and power if necessary.  
> > >  
> > > http://wattsupply.com/s.nl/sc.30/category.2200/.f
> > >  
> > > Or unregulated supplies from Antek are popular
> > >  
> > > http://stores.ebay.com/Antek-inc?_trksid=p2047675.l2563
> > >  
> > > HTH
> > > TK
> > >
> > >
> > > ________________________________
> > > From: daveymahomh600e <david.m.stevenson@>
> > > To: DynoMotion@yahoogroups.com
> > > Sent: Tuesday, October 9, 2012 5:10 AM
> > > Subject: [DynoMotion] Re: Help With a Complete System
> > >
> > >  
> > >
> > > Thanks Tom.
> > >
> > > I am not a C programmer, but have done other languages and am willing to learn the details. Do you suggest any particular power supply to be used with the SnapAmp? Are there certain parameters relating to the power supply that I would have to consider? Is there any step-by-step available that would help me through the process? I will finish going through the CNCzone thread today.
> > >
> > > I started out using Mach3 but am hearing so many horror stories that I would rather stay away from it. The machine requirements are quite simple, with the hardest part being a digitizing routine for the mandrel chuck (metal spinning). I read that glowing recommendation about your CNC program last week and want to give it a try. I believe that the DynoMotion solution will give me much more flexibility with the machine design.
> > >
> > > David
> > >
> > > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote:
> > > >
> > > > Hi David,
> > > > ÃÆ'‚ 
> > > > It is definitely possible :}ÃÆ'‚  Yes you must provide a power supply to drive the motors.ÃÆ'‚  Each SnapAmp has two power supply inputs (one for each motor) so each motor may uses a separate supply and voltage.ÃÆ'‚  Or you can connect one bigger supply to both inputs.ÃÆ'‚  There is an example C program called AutPhaseFind.c that can be used to determine the commutation parameters of your motor.ÃÆ'‚  You might look at it to see if you understand it.ÃÆ'‚  Here is a link to a CNCZone thread where a User had some issues with a brushless motor.
> > > > ÃÆ'‚ 
> > > > http://www.cnczone.com/forums/dynomotion_kflop_kanalog/157938-kflop_snapamps.html#post1138368
> > > > ÃÆ'‚ 
> > > > ÃÆ'‚ 
> > > > ÃÆ'‚ 
> > > > If you wish to be able to control your Spindle Speed from the control you must interface your VFD somehow to KFLOP.
> > > > ÃÆ'‚ 
> > > > ÃÆ'‚ 
> > > > Regards
> > > > TK
> > > > ÃÆ'‚ 
> > > >
> > > >
> > > > ________________________________
> > > > From: daveymahomh600e <david.m.stevenson@>
> > > > To: mailto:DynoMotion%40yahoogroups.com
> > > > Sent: Monday, October 8, 2012 12:31 PM
> > > > Subject: [DynoMotion] Re: Help With a Complete System
> > > >
> > > > ÃÆ'‚ 
> > > > Thanks Tom.
> > > > The power requirements fall within that range. I suspect that complicated doesn't mean almost impossible? Is a separate power supply required for the motor power?
> > > >
> > > > As for the spindle, it would be a VFD controlled AC motor. This machine wouldn't be used for any threading or like operations.
> > > >
> > > > David
> > > >
> > > > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote:
> > > > >
> > > > > Hi David,
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > It depends on the voltage and current requirements of your 3 phase brushless motors.ÃÆ'Æ'‚ÃÆ'‚  SnapAmp is limited to an 80V supply and 12.5A cont.ÃÆ'Æ'‚ÃÆ'‚  If that is adequate then SnapAmp could be used to drive them.ÃÆ'Æ'‚ÃÆ'‚  It is a bit complicated to figure out the commutation and servo tuning parameters.ÃÆ'Æ'‚ÃÆ'‚  Otherwise you would need external drives with analog input that could be driven with our Kanalog board.
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > Most of the IO requirements would be supplied by the SnapAmp or Kanalog boards.ÃÆ'Æ'‚ÃÆ'‚  SnapAmp doesn't have an analog output for Spindle Speed control so if that is needed another device would be required.ÃÆ'Æ'‚ÃÆ'‚  You didn't mention how the Spindle would be controlled.ÃÆ'Æ'‚ÃÆ'‚  The Spindle requires an encoder to do threading.
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > Regards
> > > > > TK
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > >
> > > > >
> > > > > ________________________________
> > > > > From: daveymahomh600e <david.m.stevenson@>
> > > > > To: mailto:DynoMotion%40yahoogroups.com
> > > > > Sent: Monday, October 8, 2012 4:35 AM
> > > > > Subject: [DynoMotion] Help With a Complete System
> > > > >
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > Hello Folks,
> > > > > I am building a new 2 axis lathe style machine which will use 2 Baldor AC brushless servo motors. There aren't a lot of input/outputs to deal with, but I was wondering which Dynomotion components I need to acquire to build a controller?
> > > > >
> > > > > Is the SnapAmp able to provide the electrics for the motors, or do I still need the drives from Baldor? The drives are quite expensive compared to the SnapAmp and it looks like the power requirements are within the capabilities of the SnapAmp.
> > > > >
> > > > > As for I/O's, do I need another board, or does the Kflop/SnapAmp take care of that too? There would be a couple of Estops, palm buttons, 4 limits and some spindle controls, but nothing too fancy.
> > > > >
> > > > > Thanks for your guidance,
> > > > > David.
> > > > >
> > > >
> > >
> > >
> > > Â
> > >
> >
>

--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi David,
>
> Those motors can each handle peak current of 16A.  With a 70V supply that is about 1100watts.  Just to give you some idea this is about 1.5HP.  But again it depends on what your application really needs.  By setting your acceleration lower you will draw less power.  I would suggest starting with something like a 70V 600W unregulated supply to power both motors.  Later you could add another if needed.  A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth.
>
>
> Regards
> TK
>
>
>
> ________________________________
> From: daveymahomh600e <david.m.stevenson@...>
> To: DynoMotion@yahoogroups.com
> Sent: Tuesday, October 9, 2012 2:02 PM
> Subject: [DynoMotion] Re: Help With a Complete System
>
>
>  
> Hi Tom,
>
> 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs?
>
> Thanks very much,
> David.
>
> --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> >
> > Hi David,
> >
> > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts).
> >
> > When a motor turns it acts like a generator with the higher the speed the higher the voltage.  This parameter tells us that at 1000RPM it will be generating 57.5V.  The supply voltage has to be higher than this to be able to put energy into the motor.  So basically with a 70V power supply you will be limited to around 1000RPM.  You need to determine if this is fast enough for your application.  Otherwise you will need to go with another amplifier that can work at a higher voltage.
> >
> > Regards
> > TK
> >
> >
> >
> >
> >
> >
> > ________________________________
> > From: daveymahomh600e <david.m.stevenson@>
> > To: DynoMotion@yahoogroups.com
> > Sent: Tuesday, October 9, 2012 1:45 PM
> > Subject: [DynoMotion] Re: Help With a Complete System
> >
> >
> >  
> >
> >
> > Hello Tom,
> >
> > Your reply was very helpful. Thank you.
> >
> > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested.
> >
> > Here are the specs for the servo...
> > Model Number BSM80C-375
> > Continuous Stall Torque
> > lb-in 31.9
> > N-m 3.6
> > Continuous Current amps 6.29
> > Peak Torque
> > lb-in 95.6
> > N-m 10.8
> > Peak Current amps 16.0
> > Thermal Resistance °C/watt 1.0
> > Thermal Time Constant Min 28
> > Mechanical Time Constant msec 2.7
> > Electrical Time Constant msec 3.73
> > Rated Speed @300 volts rpm 4000
> > Rated Speed @600 volts rpm 8000
> > Electrical
> > Torque Constant
> > lb-in/amp 6.0
> > N-m/amp 0.67
> > Voltage Constant
> > Vpk/krpm 57.5
> > Vrms/krpm 40.7
> > Resistance ohms 2.2
> > Inductance mH 8.2
> > Mechanical Inertia
> > lb-in-s2 0.00497
> > Kg-cm2 5.53
> > Maximum Speed rpm 10,000
> > Number of Motor Poles 4
> > Weight lbs/Kg 13/5.9
> >
> > Does everything look okay to you?
> >
> > Thanks for the power supply links.
> >
> > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here.
> >
> > Thanks again,
> > David.
> >
> > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> > >
> > > Hi David,
> > >  
> > > I'm sure you will have no trouble with the C and we can help.  It mostly involves cutting and pasting and changing parameters.
> > >  
> > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.  You must keep the peak supply voltage less than 80V with SnapAmp.  So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.  And basically the more power the better.  You might consider starting out with something like a low cost and lower voltage 48V 300W regulated supply.  Meanwell sells them for about $60.  Running at lower voltage will limit your max speed.  Lower power will limit your max acceleration.  Once everything is working you can go to higher voltage and power if necessary.  
> > >  
> > > http://wattsupply.com/s.nl/sc.30/category.2200/.f
> > >  
> > > Or unregulated supplies from Antek are popular
> > >  
> > > http://stores.ebay.com/Antek-inc?_trksid=p2047675.l2563
> > >  
> > > HTH
> > > TK
> > >
> > >
> > > ________________________________
> > > From: daveymahomh600e <david.m.stevenson@>
> > > To: DynoMotion@yahoogroups.com
> > > Sent: Tuesday, October 9, 2012 5:10 AM
> > > Subject: [DynoMotion] Re: Help With a Complete System
> > >
> > >  
> > >
> > > Thanks Tom.
> > >
> > > I am not a C programmer, but have done other languages and am willing to learn the details. Do you suggest any particular power supply to be used with the SnapAmp? Are there certain parameters relating to the power supply that I would have to consider? Is there any step-by-step available that would help me through the process? I will finish going through the CNCzone thread today.
> > >
> > > I started out using Mach3 but am hearing so many horror stories that I would rather stay away from it. The machine requirements are quite simple, with the hardest part being a digitizing routine for the mandrel chuck (metal spinning). I read that glowing recommendation about your CNC program last week and want to give it a try. I believe that the DynoMotion solution will give me much more flexibility with the machine design.
> > >
> > > David
> > >
> > > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote:
> > > >
> > > > Hi David,
> > > > ÃÆ'‚ 
> > > > It is definitely possible :}ÃÆ'‚  Yes you must provide a power supply to drive the motors.ÃÆ'‚  Each SnapAmp has two power supply inputs (one for each motor) so each motor may uses a separate supply and voltage.ÃÆ'‚  Or you can connect one bigger supply to both inputs.ÃÆ'‚  There is an example C program called AutPhaseFind.c that can be used to determine the commutation parameters of your motor.ÃÆ'‚  You might look at it to see if you understand it.ÃÆ'‚  Here is a link to a CNCZone thread where a User had some issues with a brushless motor.
> > > > ÃÆ'‚ 
> > > > http://www.cnczone.com/forums/dynomotion_kflop_kanalog/157938-kflop_snapamps.html#post1138368
> > > > ÃÆ'‚ 
> > > > ÃÆ'‚ 
> > > > ÃÆ'‚ 
> > > > If you wish to be able to control your Spindle Speed from the control you must interface your VFD somehow to KFLOP.
> > > > ÃÆ'‚ 
> > > > ÃÆ'‚ 
> > > > Regards
> > > > TK
> > > > ÃÆ'‚ 
> > > >
> > > >
> > > > ________________________________
> > > > From: daveymahomh600e <david.m.stevenson@>
> > > > To: mailto:DynoMotion%40yahoogroups.com
> > > > Sent: Monday, October 8, 2012 12:31 PM
> > > > Subject: [DynoMotion] Re: Help With a Complete System
> > > >
> > > > ÃÆ'‚ 
> > > > Thanks Tom.
> > > > The power requirements fall within that range. I suspect that complicated doesn't mean almost impossible? Is a separate power supply required for the motor power?
> > > >
> > > > As for the spindle, it would be a VFD controlled AC motor. This machine wouldn't be used for any threading or like operations.
> > > >
> > > > David
> > > >
> > > > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote:
> > > > >
> > > > > Hi David,
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > It depends on the voltage and current requirements of your 3 phase brushless motors.ÃÆ'Æ'‚ÃÆ'‚  SnapAmp is limited to an 80V supply and 12.5A cont.ÃÆ'Æ'‚ÃÆ'‚  If that is adequate then SnapAmp could be used to drive them.ÃÆ'Æ'‚ÃÆ'‚  It is a bit complicated to figure out the commutation and servo tuning parameters.ÃÆ'Æ'‚ÃÆ'‚  Otherwise you would need external drives with analog input that could be driven with our Kanalog board.
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > Most of the IO requirements would be supplied by the SnapAmp or Kanalog boards.ÃÆ'Æ'‚ÃÆ'‚  SnapAmp doesn't have an analog output for Spindle Speed control so if that is needed another device would be required.ÃÆ'Æ'‚ÃÆ'‚  You didn't mention how the Spindle would be controlled.ÃÆ'Æ'‚ÃÆ'‚  The Spindle requires an encoder to do threading.
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > Regards
> > > > > TK
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > >
> > > > >
> > > > > ________________________________
> > > > > From: daveymahomh600e <david.m.stevenson@>
> > > > > To: mailto:DynoMotion%40yahoogroups.com
> > > > > Sent: Monday, October 8, 2012 4:35 AM
> > > > > Subject: [DynoMotion] Help With a Complete System
> > > > >
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > Hello Folks,
> > > > > I am building a new 2 axis lathe style machine which will use 2 Baldor AC brushless servo motors. There aren't a lot of input/outputs to deal with, but I was wondering which Dynomotion components I need to acquire to build a controller?
> > > > >
> > > > > Is the SnapAmp able to provide the electrics for the motors, or do I still need the drives from Baldor? The drives are quite expensive compared to the SnapAmp and it looks like the power requirements are within the capabilities of the SnapAmp.
> > > > >
> > > > > As for I/O's, do I need another board, or does the Kflop/SnapAmp take care of that too? There would be a couple of Estops, palm buttons, 4 limits and some spindle controls, but nothing too fancy.
> > > > >
> > > > > Thanks for your guidance,
> > > > > David.
> > > > >
> > > >
> > >
> > >
> > > Â
> > >
> >
>

 

Hello Tom,

Sorry to bother you, but I wanted to confirm that this would be an appropriate power supply for my system...

http://www.ebay.com/itm/70V-600W-CNC-Mill-Router-Power-Supply-Gecko-Driver-/370546932025?pt=LH_DefaultDomain_0&hash=item5646517939

Thank you,
David.

--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi David,
>
> Those motors can each handle peak current of 16A.  With a 70V supply that is about 1100watts.  Just to give you some idea this is about 1.5HP.  But again it depends on what your application really needs.  By setting your acceleration lower you will draw less power.  I would suggest starting with something like a 70V 600W unregulated supply to power both motors.  Later you could add another if needed.  A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth.
>
>
> Regards
> TK
>
>
>
> ________________________________
> From: daveymahomh600e <david.m.stevenson@...>
> To: DynoMotion@yahoogroups.com
> Sent: Tuesday, October 9, 2012 2:02 PM
> Subject: [DynoMotion] Re: Help With a Complete System
>
>
>  
> Hi Tom,
>
> 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs?
>
> Thanks very much,
> David.
>
> --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> >
> > Hi David,
> >
> > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts).
> >
> > When a motor turns it acts like a generator with the higher the speed the higher the voltage.  This parameter tells us that at 1000RPM it will be generating 57.5V.  The supply voltage has to be higher than this to be able to put energy into the motor.  So basically with a 70V power supply you will be limited to around 1000RPM.  You need to determine if this is fast enough for your application.  Otherwise you will need to go with another amplifier that can work at a higher voltage.
> >
> > Regards
> > TK
> >
> >
> >
> >
> >
> >
> > ________________________________
> > From: daveymahomh600e <david.m.stevenson@>
> > To: DynoMotion@yahoogroups.com
> > Sent: Tuesday, October 9, 2012 1:45 PM
> > Subject: [DynoMotion] Re: Help With a Complete System
> >
> >
> >  
> >
> >
> > Hello Tom,
> >
> > Your reply was very helpful. Thank you.
> >
> > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested.
> >
> > Here are the specs for the servo...
> > Model Number BSM80C-375
> > Continuous Stall Torque
> > lb-in 31.9
> > N-m 3.6
> > Continuous Current amps 6.29
> > Peak Torque
> > lb-in 95.6
> > N-m 10.8
> > Peak Current amps 16.0
> > Thermal Resistance °C/watt 1.0
> > Thermal Time Constant Min 28
> > Mechanical Time Constant msec 2.7
> > Electrical Time Constant msec 3.73
> > Rated Speed @300 volts rpm 4000
> > Rated Speed @600 volts rpm 8000
> > Electrical
> > Torque Constant
> > lb-in/amp 6.0
> > N-m/amp 0.67
> > Voltage Constant
> > Vpk/krpm 57.5
> > Vrms/krpm 40.7
> > Resistance ohms 2.2
> > Inductance mH 8.2
> > Mechanical Inertia
> > lb-in-s2 0.00497
> > Kg-cm2 5.53
> > Maximum Speed rpm 10,000
> > Number of Motor Poles 4
> > Weight lbs/Kg 13/5.9
> >
> > Does everything look okay to you?
> >
> > Thanks for the power supply links.
> >
> > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here.
> >
> > Thanks again,
> > David.
> >
> > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> > >
> > > Hi David,
> > >  
> > > I'm sure you will have no trouble with the C and we can help.  It mostly involves cutting and pasting and changing parameters.
> > >  
> > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.  You must keep the peak supply voltage less than 80V with SnapAmp.  So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.  And basically the more power the better.  You might consider starting out with something like a low cost and lower voltage 48V 300W regulated supply.  Meanwell sells them for about $60.  Running at lower voltage will limit your max speed.  Lower power will limit your max acceleration.  Once everything is working you can go to higher voltage and power if necessary.  
> > >  
> > > http://wattsupply.com/s.nl/sc.30/category.2200/.f
> > >  
> > > Or unregulated supplies from Antek are popular
> > >  
> > > http://stores.ebay.com/Antek-inc?_trksid=p2047675.l2563
> > >  
> > > HTH
> > > TK
> > >
> > >
> > > ________________________________
> > > From: daveymahomh600e <david.m.stevenson@>
> > > To: DynoMotion@yahoogroups.com
> > > Sent: Tuesday, October 9, 2012 5:10 AM
> > > Subject: [DynoMotion] Re: Help With a Complete System
> > >
> > >  
> > >
> > > Thanks Tom.
> > >
> > > I am not a C programmer, but have done other languages and am willing to learn the details. Do you suggest any particular power supply to be used with the SnapAmp? Are there certain parameters relating to the power supply that I would have to consider? Is there any step-by-step available that would help me through the process? I will finish going through the CNCzone thread today.
> > >
> > > I started out using Mach3 but am hearing so many horror stories that I would rather stay away from it. The machine requirements are quite simple, with the hardest part being a digitizing routine for the mandrel chuck (metal spinning). I read that glowing recommendation about your CNC program last week and want to give it a try. I believe that the DynoMotion solution will give me much more flexibility with the machine design.
> > >
> > > David
> > >
> > > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote:
> > > >
> > > > Hi David,
> > > > ÃÆ'‚ 
> > > > It is definitely possible :}ÃÆ'‚  Yes you must provide a power supply to drive the motors.ÃÆ'‚  Each SnapAmp has two power supply inputs (one for each motor) so each motor may uses a separate supply and voltage.ÃÆ'‚  Or you can connect one bigger supply to both inputs.ÃÆ'‚  There is an example C program called AutPhaseFind.c that can be used to determine the commutation parameters of your motor.ÃÆ'‚  You might look at it to see if you understand it.ÃÆ'‚  Here is a link to a CNCZone thread where a User had some issues with a brushless motor.
> > > > ÃÆ'‚ 
> > > > http://www.cnczone.com/forums/dynomotion_kflop_kanalog/157938-kflop_snapamps.html#post1138368
> > > > ÃÆ'‚ 
> > > > ÃÆ'‚ 
> > > > ÃÆ'‚ 
> > > > If you wish to be able to control your Spindle Speed from the control you must interface your VFD somehow to KFLOP.
> > > > ÃÆ'‚ 
> > > > ÃÆ'‚ 
> > > > Regards
> > > > TK
> > > > ÃÆ'‚ 
> > > >
> > > >
> > > > ________________________________
> > > > From: daveymahomh600e <david.m.stevenson@>
> > > > To: mailto:DynoMotion%40yahoogroups.com
> > > > Sent: Monday, October 8, 2012 12:31 PM
> > > > Subject: [DynoMotion] Re: Help With a Complete System
> > > >
> > > > ÃÆ'‚ 
> > > > Thanks Tom.
> > > > The power requirements fall within that range. I suspect that complicated doesn't mean almost impossible? Is a separate power supply required for the motor power?
> > > >
> > > > As for the spindle, it would be a VFD controlled AC motor. This machine wouldn't be used for any threading or like operations.
> > > >
> > > > David
> > > >
> > > > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote:
> > > > >
> > > > > Hi David,
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > It depends on the voltage and current requirements of your 3 phase brushless motors.ÃÆ'Æ'‚ÃÆ'‚  SnapAmp is limited to an 80V supply and 12.5A cont.ÃÆ'Æ'‚ÃÆ'‚  If that is adequate then SnapAmp could be used to drive them.ÃÆ'Æ'‚ÃÆ'‚  It is a bit complicated to figure out the commutation and servo tuning parameters.ÃÆ'Æ'‚ÃÆ'‚  Otherwise you would need external drives with analog input that could be driven with our Kanalog board.
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > Most of the IO requirements would be supplied by the SnapAmp or Kanalog boards.ÃÆ'Æ'‚ÃÆ'‚  SnapAmp doesn't have an analog output for Spindle Speed control so if that is needed another device would be required.ÃÆ'Æ'‚ÃÆ'‚  You didn't mention how the Spindle would be controlled.ÃÆ'Æ'‚ÃÆ'‚  The Spindle requires an encoder to do threading.
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > Regards
> > > > > TK
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > >
> > > > >
> > > > > ________________________________
> > > > > From: daveymahomh600e <david.m.stevenson@>
> > > > > To: mailto:DynoMotion%40yahoogroups.com
> > > > > Sent: Monday, October 8, 2012 4:35 AM
> > > > > Subject: [DynoMotion] Help With a Complete System
> > > > >
> > > > > ÃÆ'Æ'‚ÃÆ'‚ 
> > > > > Hello Folks,
> > > > > I am building a new 2 axis lathe style machine which will use 2 Baldor AC brushless servo motors. There aren't a lot of input/outputs to deal with, but I was wondering which Dynomotion components I need to acquire to build a controller?
> > > > >
> > > > > Is the SnapAmp able to provide the electrics for the motors, or do I still need the drives from Baldor? The drives are quite expensive compared to the SnapAmp and it looks like the power requirements are within the capabilities of

Group: DynoMotion	Message: 5910	From: daveymahomh600e	Date: 10/26/2012
Subject: Re: Help With a Complete System

Hello Tom, I now have all the parts to start connecting the system together, but I am unsure whether it would be better to connect my incremental encoders to the SnapAmp or the Kflop board? Thanks, David. --- In DynoMotion@yahoogroups.com, TK <tk@...> wrote: > > Hi David, > > The specification is not clear what the no load voltage is. But I would expect it to be less than 80V. They claim it should work with Geckos which are limited to 80V also. I assume they made a typo that the Caps are rated for only 50V. I suppose you would need to ask them. > > Regards > TK > > On Oct 9, 2012, at 5:01 PM, "daveymahomh600e" <david.m.stevenson@...> wrote: > > > Hello Tom, > > > > Sorry to bother you, but I wanted to confirm that this would be an appropriate power supply for my system... > > > > http://www.ebay.com/itm/70V-600W-CNC-Mill-Router-Power-Supply-Gecko-Driver-/370546932025?pt=LH_DefaultDomain_0&hash=item5646517939 > > > > Thank you, > > David. > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > Hi David, > > > > > > Those motors can each handle peak current of 16A. With a 70V supply that is about 1100watts. Just to give you some idea this is about 1.5HP. But again it depends on what your application really needs. By setting your acceleration lower you will draw less power. I would suggest starting with something like a 70V 600W unregulated supply to power both motors. Later you could add another if needed. A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth. > > > > > > > > > Regards > > > TK > > > > > > > > > > > > ________________________________ > > > From: daveymahomh600e <david.m.stevenson@> > > > To: DynoMotion@yahoogroups.com > > > Sent: Tuesday, October 9, 2012 2:02 PM > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > >  > > > Hi Tom, > > > > > > 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs? > > > > > > Thanks very much, > > > David. > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > Hi David, > > > > > > > > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts). > > > > > > > > When a motor turns it acts like a generator with the higher the speed the higher the voltage. This parameter tells us that at 1000RPM it will be generating 57.5V. The supply voltage has to be higher than this to be able to put energy into the motor. So basically with a 70V power supply you will be limited to around 1000RPM. You need to determine if this is fast enough for your application. Otherwise you will need to go with another amplifier that can work at a higher voltage. > > > > > > > > Regards > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > From: daveymahomh600e <david.m.stevenson@> > > > > To: DynoMotion@yahoogroups.com > > > > Sent: Tuesday, October 9, 2012 1:45 PM > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > >  > > > > > > > > > > > > Hello Tom, > > > > > > > > Your reply was very helpful. Thank you. > > > > > > > > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested. > > > > > > > > Here are the specs for the servo... > > > > Model Number BSM80C-375 > > > > Continuous Stall Torque > > > > lb-in 31.9 > > > > N-m 3.6 > > > > Continuous Current amps 6.29 > > > > Peak Torque > > > > lb-in 95.6 > > > > N-m 10.8 > > > > Peak Current amps 16.0 > > > > Thermal Resistance °C/watt 1.0 > > > > Thermal Time Constant Min 28 > > > > Mechanical Time Constant msec 2.7 > > > > Electrical Time Constant msec 3.73 > > > > Rated Speed @300 volts rpm 4000 > > > > Rated Speed @600 volts rpm 8000 > > > > Electrical > > > > Torque Constant > > > > lb-in/amp 6.0 > > > > N-m/amp 0.67 > > > > Voltage Constant > > > > Vpk/krpm 57.5 > > > > Vrms/krpm 40.7 > > > > Resistance ohms 2.2 > > > > Inductance mH 8.2 > > > > Mechanical Inertia > > > > lb-in-s2 0.00497 > > > > Kg-cm2 5.53 > > > > Maximum Speed rpm 10,000 > > > > Number of Motor Poles 4 > > > > Weight lbs/Kg 13/5.9 > > > > > > > > Does everything look okay to you? > > > > > > > > Thanks for the power supply links. > > > > > > > > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here. > > > > > > > > Thanks again, > > > > David. > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > Hi David, > > > > > ÃÆ'‚ > > > > > I'm sure you will have no trouble with the C and we can help.ÃÆ'‚ It mostly involves cutting and pasting and changing parameters. > > > > > ÃÆ'‚ > > > > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.ÃÆ'‚ You must keep the peak supply voltage less than 80V with SnapAmp.ÃÆ'‚ So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.ÃÆ'‚ And basically the more power the better.ÃÆ'‚ You might consider starting out with something like a low cost and lower voltage 48V 300W regulated supply.ÃÆ'‚ Meanwell sells them for about $60.ÃÆ'‚ Running at lower voltage will limit your max speed.ÃÆ'‚ Lower power will limit your max acceleration.ÃÆ'‚ ÃÆ'‚ Once everything is working you can go to higher voltage and power if necessary.ÃÆ'‚ ÃÆ'‚ > > > > > ÃÆ'‚ > > > > > http://wattsupply.com/s.nl/sc.30/category.2200/.f > > > > > ÃÆ'‚ > > > > > Or unregulated supplies from Antek are popular > > > > > ÃÆ'‚ > > > > > http://stores.ebay.com/Antek-inc?_trksid=p2047675.l2563 > > > > > ÃÆ'‚ > > > > > HTH > > > > > TK > > > > > > > > > > > > > > > ________________________________ > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > To: DynoMotion@yahoogroups.com > > > > > Sent: Tuesday, October 9, 2012 5:10 AM > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > ÃÆ'‚ > > > > > > > > > > Thanks Tom. > > > > > > > > > > I am not a C programmer, but have done other languages and am willing to learn the details. Do you suggest any particular power supply to be used with the SnapAmp? Are there certain parameters relating to the power supply that I would have to consider? Is there any step-by-step available that would help me through the process? I will finish going through the CNCzone thread today. > > > > > > > > > > I started out using Mach3 but am hearing so many horror stories that I would rather stay away from it. The machine requirements are quite simple, with the hardest part being a digitizing routine for the mandrel chuck (metal spinning). I read that glowing recommendation about your CNC program last week and want to give it a try. I believe that the DynoMotion solution will give me much more flexibility with the machine design. > > > > > > > > > > David > > > > > > > > > > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > Hi David, > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > It is definitely possible :}ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Yes you must provide a power supply to drive the motors.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Each SnapAmp has two power supply inputs (one for each motor) so each motor may uses a separate supply and voltage.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Or you can connect one bigger supply to both inputs.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ There is an example C program called AutPhaseFind.c that can be used to determine the commutation parameters of your motor.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You might look at it to see if you understand it.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Here is a link to a CNCZone thread where a User had some issues with a brushless motor. > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > http://www.cnczone.com/forums/dynomotion_kflop_kanalog/157938-kflop_snapamps.html#post1138368 > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > If you wish to be able to control your Spindle Speed from the control you must interface your VFD somehow to KFLOP. > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > Regards > > > > > > TK > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > To: mailto:DynoMotion%40yahoogroups.com > > > > > > Sent: Monday, October 8, 2012 12:31 PM > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > Thanks Tom. > > > > > > The power requirements fall within that range. I suspect that complicated doesn't mean almost impossible? Is a separate power supply required for the motor power? > > > > > > > > > > > > As for the spindle, it would be a VFD controlled AC motor. This machine wouldn't be used for any threading or like operations. > > > > > > > > > > > > David > > > > > > > > > > > > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > Hi David, > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > It depends on the voltage and current requirements of your 3 phase brushless motors.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ SnapAmp is limited to an 80V supply and 12.5A cont.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ If that is adequate then SnapAmp could be used to drive them.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ It is a bit complicated to figure out the commutation and servo tuning parameters.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Otherwise you would need external drives with analog input that could be driven with our Kanalog board. > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > Most of the IO requirements would be supplied by the SnapAmp or Kanalog boards.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ SnapAmp doesn't have an analog output for Spindle Speed control so if that is needed another device would be required.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You didn't mention how the Spindle would be controlled.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ The Spindle requires an encoder to do threading. > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > Regards > > > > > > > TK > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > To: mailto:DynoMotion%40yahoogroups.com > > > > > > > Sent: Monday, October 8, 2012 4:35 AM > > > > > > > Subject: [DynoMotion] Help With a Complete System > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > Hello Folks, > > > > > > > I am building a new 2 axis lathe style machine which will use 2 Baldor AC brushless servo motors. There aren't a lot of input/outputs to deal with, but I was wondering which Dynomotion components I need to acquire to build a controller? > > > > > > > > > > > > > > Is the SnapAmp able to provide the electrics for the motors, or do I still need the drives from Baldor? The drives are quite expensive compared to the SnapAmp and it looks like the power requirements are within the capabilities of >

Group: DynoMotion	Message: 5911	From: Tom Kerekes	Date: 10/26/2012
Subject: Re: Help With a Complete System

Hi David, SnapAmp has differential encoder inputs so that would be the best option if your encoders have differential outputs. Differential encoders have 4 signals A+ A- B+ B-.  Single ended encoders only have A and B Regards TK Group: DynoMotion Message: 5912 From: daveymahomh600e Date: 10/26/2012 Subject: Re: Help With a Complete System Thanks Tom, They are differential encoders. David --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote: > > Hi David, > > SnapAmp has differential encoder inputs so that would be the best option if your encoders have differential outputs. > > Differential encoders have 4 signals A+ A- B+ B-.  Single ended encoders only have A and B > > Regards > TK > > > > > ________________________________ > From: daveymahomh600e <david.m.stevenson@...> > To: DynoMotion@yahoogroups.com > Sent: Friday, October 26, 2012 1:37 PM > Subject: [DynoMotion] Re: Help With a Complete System > > >   > Hello Tom, > > I now have all the parts to start connecting the system together, but I am unsure whether it would be better to connect my incremental encoders to the SnapAmp or the Kflop board? > > Thanks, > David. > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > Hi David, > > > > The specification is not clear what the no load voltage is. But I would expect it to be less than 80V. They claim it should work with Geckos which are limited to 80V also. I assume they made a typo that the Caps are rated for only 50V. I suppose you would need to ask them. > > > > Regards > > TK > > > > On Oct 9, 2012, at 5:01 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > Hello Tom, > > > > > > Sorry to bother you, but I wanted to confirm that this would be an appropriate power supply for my system... > > > > > > http://www.ebay.com/itm/70V-600W-CNC-Mill-Router-Power-Supply-Gecko-Driver-/370546932025?pt=LH_DefaultDomain_0&hash=item5646517939 > > > > > > Thank you, > > > David. > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > Hi David, > > > > > > > > Those motors can each handle peak current of 16A. With a 70V supply that is about 1100watts. Just to give you some idea this is about 1.5HP. But again it depends on what your application really needs. By setting your acceleration lower you will draw less power. I would suggest starting with something like a 70V 600W unregulated supply to power both motors. Later you could add another if needed. A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth. > > > > > > > > > > > > Regards > > > > TK > > > > > > > > > > > > > > > > ________________________________ > > > > From: daveymahomh600e <david.m.stevenson@> > > > > To: DynoMotion@yahoogroups.com > > > > Sent: Tuesday, October 9, 2012 2:02 PM > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > >  > > > > Hi Tom, > > > > > > > > 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs? > > > > > > > > Thanks very much, > > > > David. > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > Hi David, > > > > > > > > > > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts). > > > > > > > > > > When a motor turns it acts like a generator with the higher the speed the higher the voltage.ÃÆ'‚ This parameter tells us that at 1000RPM it will be generating 57.5V.ÃÆ'‚ The supply voltage has to be higher than this to be able to put energy into the motor.ÃÆ'‚ So basically with a 70V power supply you will be limited to around 1000RPM.ÃÆ'‚ You need to determine if this is fast enough for your application.ÃÆ'‚ Otherwise you will need to go with another amplifier that can work at a higher voltage. > > > > > > > > > > Regards > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > To: DynoMotion@yahoogroups.com > > > > > Sent: Tuesday, October 9, 2012 1:45 PM > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > ÃÆ'‚ > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > Your reply was very helpful. Thank you. > > > > > > > > > > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested. > > > > > > > > > > Here are the specs for the servo... > > > > > Model Number BSM80C-375 > > > > > Continuous Stall Torque > > > > > lb-in 31.9 > > > > > N-m 3.6 > > > > > Continuous Current amps 6.29 > > > > > Peak Torque > > > > > lb-in 95.6 > > > > > N-m 10.8 > > > > > Peak Current amps 16.0 > > > > > Thermal Resistance ÃÆ'‚°C/watt 1.0 > > > > > Thermal Time Constant Min 28 > > > > > Mechanical Time Constant msec 2.7 > > > > > Electrical Time Constant msec 3.73 > > > > > Rated Speed @300 volts rpm 4000 > > > > > Rated Speed @600 volts rpm 8000 > > > > > Electrical > > > > > Torque Constant > > > > > lb-in/amp 6.0 > > > > > N-m/amp 0.67 > > > > > Voltage Constant > > > > > Vpk/krpm 57.5 > > > > > Vrms/krpm 40.7 > > > > > Resistance ohms 2.2 > > > > > Inductance mH 8.2 > > > > > Mechanical Inertia > > > > > lb-in-s2 0.00497 > > > > > Kg-cm2 5.53 > > > > > Maximum Speed rpm 10,000 > > > > > Number of Motor Poles 4 > > > > > Weight lbs/Kg 13/5.9 > > > > > > > > > > Does everything look okay to you? > > > > > > > > > > Thanks for the power supply links. > > > > > > > > > > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here. > > > > > > > > > > Thanks again, > > > > > David. > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > Hi David, > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > I'm sure you will have no trouble with the C and we can help.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ It mostly involves cutting and pasting and changing parameters. > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You must keep the peak supply voltage less than 80V with SnapAmp.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ And basically the more power the better.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You might consider starting out with something like a low cost and lower voltage 48V 300W regulated supply.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Meanwell sells them for about $60.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Running at lower voltage will limit your max speed.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Lower power will limit your max acceleration.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Once everything is working you can go to higher voltage and > power if necessary.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > http://wattsupply.com/s.nl/sc.30/category.2200/.f > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > Or unregulated supplies from Antek are popular > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > http://stores.ebay.com/Antek-inc?_trksid=p2047675.l2563 > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > HTH > > > > > > TK > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > To: DynoMotion@yahoogroups.com > > > > > > Sent: Tuesday, October 9, 2012 5:10 AM > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > > > > Thanks Tom. > > > > > > > > > > > > I am not a C programmer, but have done other languages and am willing to learn the details. Do you suggest any particular power supply to be used with the SnapAmp? Are there certain parameters relating to the power supply that I would have to consider? Is there any step-by-step available that would help me through the process? I will finish going through the CNCzone thread today. > > > > > > > > > > > > I started out using Mach3 but am hearing so many horror stories that I would rather stay away from it. The machine requirements are quite simple, with the hardest part being a digitizing routine for the mandrel chuck (metal spinning). I read that glowing recommendation about your CNC program last week and want to give it a try. I believe that the DynoMotion solution will give me much more flexibility with the machine design. > > > > > > > > > > > > David > > > > > > > > > > > > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > Hi David, > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > It is definitely possible :}ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Yes you must provide a power supply to drive the motors.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Each SnapAmp has two power supply inputs (one for each motor) so each motor may uses a separate supply and voltage.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Or you can connect one bigger supply to both inputs.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ There is an example C program called AutPhaseFind.c that can be used to determine the commutation parameters of your motor.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You might look at it to see if you understand it.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Here is a link to a > CNCZone thread where a User had some issues with a brushless motor. > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > http://www.cnczone.com/forums/dynomotion_kflop_kanalog/157938-kflop_snapamps.html#post1138368 > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > If you wish to be able to control your Spindle Speed from the control you must interface your VFD somehow to KFLOP. > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > Regards > > > > > > > TK > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > To: mailto:DynoMotion%40yahoogroups.com > > > > > > > Sent: Monday, October 8, 2012 12:31 PM > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > Thanks Tom. > > > > > > > The power requirements fall within that range. I suspect that complicated doesn't mean almost impossible? Is a separate power supply required for the motor power? > > > > > > > > > > > > > > As for the spindle, it would be a VFD controlled AC motor. This machine wouldn't be used for any threading or like operations. > > > > > > > > > > > > > > David > > > > > > > > > > > > > > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > Hi David, > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > It depends on the voltage and current requirements of your 3 phase brushless motors.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ SnapAmp is limited to an 80V supply and 12.5A cont.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ If that is adequate then SnapAmp could be used to drive them.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ It is a bit complicated to figure out the commutation and servo tuning > parameters.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Otherwise you would need external drives with analog input that could be driven with our Kanalog board. > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > Most of the IO requirements would be supplied by the SnapAmp or Kanalog boards.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ SnapAmp doesn't have an analog output for Spindle Speed control so if that is needed another device would be required.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You didn't mention how the Spindle would be controlled.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ The Spindle requires an encoder to do threading. > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > Regards > > > > > > > > TK > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > To: mailto:DynoMotion%40yahoogroups.com > > > > > > > > Sent: Monday, October 8, 2012 4:35 AM > > > > > > > > Subject: [DynoMotion] Help With a Complete System > > > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > Hello Folks, > > > > > > > > I am building a new 2 axis lathe style machine which will use 2 Baldor AC brushless servo motors. There aren't a lot of input/outputs to deal with, but I was wondering which Dynomotion components I need to acquire to build a controller? > > > > > > > > > > > > > > > > Is the SnapAmp able to provide the electrics for the motors, or do I still need the drives from Baldor? The drives are quite expensive compared to the SnapAmp and it looks like the power requirements are within the capabilities of > > > Group: DynoMotion Message: 5919 From: daveymahomh600e Date: 10/28/2012 Subject: Re: Help With a Complete System Hi Tom, I am having trouble getting my encoder signal to show up when I do the autophasefind thing. It has a Z+Z- connection for the index and I have connected it to pins 19 and 20 of the SnapAmp while working on channel 0. I have set the Z bit to 66, but still no joy. Is there a better place to connect the index? Thank you, David. --- In DynoMotion@yahoogroups.com, "daveymahomh600e" <david.m.stevenson@...> wrote: > > Thanks Tom, > > They are differential encoders. > > David > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > Hi David, > > > > SnapAmp has differential encoder inputs so that would be the best option if your encoders have differential outputs. > > > > Differential encoders have 4 signals A+ A- B+ B-.  Single ended encoders only have A and B > > > > Regards > > TK > > > > > > > > > > ________________________________ > > From: daveymahomh600e <david.m.stevenson@> > > To: DynoMotion@yahoogroups.com > > Sent: Friday, October 26, 2012 1:37 PM > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > >   > > Hello Tom, > > > > I now have all the parts to start connecting the system together, but I am unsure whether it would be better to connect my incremental encoders to the SnapAmp or the Kflop board? > > > > Thanks, > > David. > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > Hi David, > > > > > > The specification is not clear what the no load voltage is. But I would expect it to be less than 80V. They claim it should work with Geckos which are limited to 80V also. I assume they made a typo that the Caps are rated for only 50V. I suppose you would need to ask them. > > > > > > Regards > > > TK > > > > > > On Oct 9, 2012, at 5:01 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > Hello Tom, > > > > > > > > Sorry to bother you, but I wanted to confirm that this would be an appropriate power supply for my system... > > > > > > > > http://www.ebay.com/itm/70V-600W-CNC-Mill-Router-Power-Supply-Gecko-Driver-/370546932025?pt=LH_DefaultDomain_0&hash=item5646517939 > > > > > > > > Thank you, > > > > David. > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > Hi David, > > > > > > > > > > Those motors can each handle peak current of 16A. With a 70V supply that is about 1100watts. Just to give you some idea this is about 1.5HP. But again it depends on what your application really needs. By setting your acceleration lower you will draw less power. I would suggest starting with something like a 70V 600W unregulated supply to power both motors. Later you could add another if needed. A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth. > > > > > > > > > > > > > > > Regards > > > > > TK > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > To: DynoMotion@yahoogroups.com > > > > > Sent: Tuesday, October 9, 2012 2:02 PM > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > >  > > > > > Hi Tom, > > > > > > > > > > 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs? > > > > > > > > > > Thanks very much, > > > > > David. > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > Hi David, > > > > > > > > > > > > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts). > > > > > > > > > > > > When a motor turns it acts like a generator with the higher the speed the higher the voltage.ÃÆ'‚ This parameter tells us that at 1000RPM it will be generating 57.5V.ÃÆ'‚ The supply voltage has to be higher than this to be able to put energy into the motor.ÃÆ'‚ So basically with a 70V power supply you will be limited to around 1000RPM.ÃÆ'‚ You need to determine if this is fast enough for your application.ÃÆ'‚ Otherwise you will need to go with another amplifier that can work at a higher voltage. > > > > > > > > > > > > Regards > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > To: DynoMotion@yahoogroups.com > > > > > > Sent: Tuesday, October 9, 2012 1:45 PM > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > ÃÆ'‚ > > > > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > Your reply was very helpful. Thank you. > > > > > > > > > > > > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested. > > > > > > > > > > > > Here are the specs for the servo... > > > > > > Model Number BSM80C-375 > > > > > > Continuous Stall Torque > > > > > > lb-in 31.9 > > > > > > N-m 3.6 > > > > > > Continuous Current amps 6.29 > > > > > > Peak Torque > > > > > > lb-in 95.6 > > > > > > N-m 10.8 > > > > > > Peak Current amps 16.0 > > > > > > Thermal Resistance ÃÆ'‚°C/watt 1.0 > > > > > > Thermal Time Constant Min 28 > > > > > > Mechanical Time Constant msec 2.7 > > > > > > Electrical Time Constant msec 3.73 > > > > > > Rated Speed @300 volts rpm 4000 > > > > > > Rated Speed @600 volts rpm 8000 > > > > > > Electrical > > > > > > Torque Constant > > > > > > lb-in/amp 6.0 > > > > > > N-m/amp 0.67 > > > > > > Voltage Constant > > > > > > Vpk/krpm 57.5 > > > > > > Vrms/krpm 40.7 > > > > > > Resistance ohms 2.2 > > > > > > Inductance mH 8.2 > > > > > > Mechanical Inertia > > > > > > lb-in-s2 0.00497 > > > > > > Kg-cm2 5.53 > > > > > > Maximum Speed rpm 10,000 > > > > > > Number of Motor Poles 4 > > > > > > Weight lbs/Kg 13/5.9 > > > > > > > > > > > > Does everything look okay to you? > > > > > > > > > > > > Thanks for the power supply links. > > > > > > > > > > > > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here. > > > > > > > > > > > > Thanks again, > > > > > > David. > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > Hi David, > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > I'm sure you will have no trouble with the C and we can help.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ It mostly involves cutting and pasting and changing parameters. > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You must keep the peak supply voltage less than 80V with SnapAmp.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ And basically the more power the better.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You might consider starting out with something like a low cost and lower voltage 48V 300W regulated supply.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Meanwell sells them for about $60.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Running at lower voltage will limit your max speed.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Lower power will limit your max acceleration.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Once everything is working you can go to higher voltage and > > power if necessary.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > http://wattsupply.com/s.nl/sc.30/category.2200/.f > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > Or unregulated supplies from Antek are popular > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > http://stores.ebay.com/Antek-inc?_trksid=p2047675.l2563 > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > HTH > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > Sent: Tuesday, October 9, 2012 5:10 AM > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > > > > > > Thanks Tom. > > > > > > > > > > > > > > I am not a C programmer, but have done other languages and am willing to learn the details. Do you suggest any particular power supply to be used with the SnapAmp? Are there certain parameters relating to the power supply that I would have to consider? Is there any step-by-step available that would help me through the process? I will finish going through the CNCzone thread today. > > > > > > > > > > > > > > I started out using Mach3 but am hearing so many horror stories that I would rather stay away from it. The machine requirements are quite simple, with the hardest part being a digitizing routine for the mandrel chuck (metal spinning). I read that glowing recommendation about your CNC program last week and want to give it a try. I believe that the DynoMotion solution will give me much more flexibility with the machine design. > > > > > > > > > > > > > > David > > > > > > > > > > > > > > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > Hi David, > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > It is definitely possible :}ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Yes you must provide a power supply to drive the motors.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Each SnapAmp has two power supply inputs (one for each motor) so each motor may uses a separate supply and voltage.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Or you can connect one bigger supply to both inputs.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ There is an example C program called AutPhaseFind.c that can be used to determine the commutation parameters of your motor.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You might look at it to see if you understand it.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Here is a link to a > > CNCZone thread where a User had some issues with a brushless motor. > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > http://www.cnczone.com/forums/dynomotion_kflop_kanalog/157938-kflop_snapamps.html#post1138368 > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > If you wish to be able to control your Spindle Speed from the control you must interface your VFD somehow to KFLOP. > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > Regards > > > > > > > > TK > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > To: mailto:DynoMotion%40yahoogroups.com > > > > > > > > Sent: Monday, October 8, 2012 12:31 PM > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > Thanks Tom. > > > > > > > > The power requirements fall within that range. I suspect that complicated doesn't mean almost impossible? Is a separate power supply required for the motor power? > > > > > > > > > > > > > > > > As for the spindle, it would be a VFD controlled AC motor. This machine wouldn't be used for any threading or like operations. > > > > > > > > > > > > > > > > David > > > > > > > > > > > > > > > > --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > It depends on the voltage and current requirements of your 3 phase brushless motors.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ SnapAmp is limited to an 80V supply and 12.5A cont.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ If that is adequate then SnapAmp could be used to drive them.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ It is a bit complicated to figure out the commutation and servo tuning > > parameters.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Otherwise you would need external drives with analog input that could be driven with our Kanalog board. > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > Most of the IO requirements would be supplied by the SnapAmp or Kanalog boards.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ SnapAmp doesn't have an analog output for Spindle Speed control so if that is needed another device would be required.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You didn't mention how the Spindle would be controlled.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ The Spindle requires an encoder to do threading. > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > Regards > > > > > > > > > TK > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > To: mailto:DynoMotion%40yahoogroups.com > > > > > > > > > Sent: Monday, October 8, 2012 4:35 AM > > > > > > > > > Subject: [DynoMotion] Help With a Complete System > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > Hello Folks, > > > > > > > > > I am building a new 2 axis lathe style machine which will use 2 Baldor AC brushless servo motors. There aren't a lot of input/outputs to deal with, but I was wondering which Dynomotion components I need to acquire to build a controller? > > > > > > > > > > > > > > > > > > Is the SnapAmp able to provide the electrics for the motors, or do I still need the drives from Baldor? The drives are quite expensive compared to the SnapAmp and it looks like the power requirements are within the capabilities of > > > > > > Group: DynoMotion Message: 5920 From: TK Date: 10/28/2012 Subject: Re: Help With a Complete System Hi David, That should work. Does the motor move?  Does the position change?  Did you check with a voltmeter? Regards TK On Oct 28, 2012, at 2:12 PM, "daveymahomh600e" <david.m.stevenson@...> wrote:   Hi Tom, I am having trouble getting my encoder signal to show up when I do the autophasefind thing. It has a Z+Z- connection for the index and I have connected it to pins 19 and 20 of the SnapAmp while working on channel 0. I have set the Z bit to 66, but still no joy. Is there a better place to connect the index? Thank you, David. --- In DynoMotion@yahoogroups.com, "daveymahomh600e" <david.m.stevenson@...> wrote: > > Thanks Tom, > > They are differential encoders. > > David > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > Hi David, > > > > SnapAmp has differential encoder inputs so that would be the best option if your encoders have differential outputs. > > > > Differential encoders have 4 signals A+ A- B+ B-.  Single ended encoders only have A and B > > > > Regards > > TK > > > > > > > > > > ________________________________ > > From: daveymahomh600e <david.m.stevenson@> > > To: DynoMotion@yahoogroups.com > > Sent: Friday, October 26, 2012 1:37 PM > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > >   > > Hello Tom, > > > > I now have all the parts to start connecting the system together, but I am unsure whether it would be better to connect my incremental encoders to the SnapAmp or the Kflop board? > > > > Thanks, > > David. > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > Hi David, > > > > > > The specification is not clear what the no load voltage is. But I would expect it to be less than 80V. They claim it should work with Geckos which are limited to 80V also. I assume they made a typo that the Caps are rated for only 50V. I suppose you would need to ask them. > > > > > > Regards > > > TK > > > > > > On Oct 9, 2012, at 5:01 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > Hello Tom, > > > > > > > > Sorry to bother you, but I wanted to confirm that this would be an appropriate power supply for my system... > > > > > > > > http://www.ebay.com/itm/70V-600W-CNC-Mill-Router-Power-Supply-Gecko-Driver-/370546932025?pt=LH_DefaultDomain_0&hash=item5646517939 > > > > > > > > Thank you, > > > > David. > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > Hi David, > > > > > > > > > > Those motors can each handle peak current of 16A. With a 70V supply that is about 1100watts. Just to give you some idea this is about 1.5HP. But again it depends on what your application really needs. By setting your acceleration lower you will draw less power. I would suggest starting with something like a 70V 600W unregulated supply to power both motors. Later you could add another if needed. A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth. > > > > > > > > > > > > > > > Regards > > > > > TK > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > To: DynoMotion@yahoogroups.com > > > > > Sent: Tuesday, October 9, 2012 2:02 PM > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > >  > > > > > Hi Tom, > > > > > > > > > > 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs? > > > > > > > > > > Thanks very much, > > > > > David. > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > Hi David, > > > > > > > > > > > > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts). > > > > > > > > > > > > When a motor turns it acts like a generator with the higher the speed the higher the voltage.ÃÆ'‚ This parameter tells us that at 1000RPM it will be generating 57.5V.ÃÆ'‚ The supply voltage has to be higher than this to be able to put energy into the motor.ÃÆ'‚ So basically with a 70V power supply you will be limited to around 1000RPM.ÃÆ'‚ You need to determine if this is fast enough for your application.ÃÆ'‚ Otherwise you will need to go with another amplifier that can work at a higher voltage. > > > > > > > > > > > > Regards > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > To: DynoMotion@yahoogroups.com > > > > > > Sent: Tuesday, October 9, 2012 1:45 PM > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > ÃÆ'‚ > > > > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > Your reply was very helpful. Thank you. > > > > > > > > > > > > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested. > > > > > > > > > > > > Here are the specs for the servo... > > > > > > Model Number BSM80C-375 > > > > > > Continuous Stall Torque > > > > > > lb-in 31.9 > > > > > > N-m 3.6 > > > > > > Continuous Current amps 6.29 > > > > > > Peak Torque > > > > > > lb-in 95.6 > > > > > > N-m 10.8 > > > > > > Peak Current amps 16.0 > > > > > > Thermal Resistance ÃÆ'‚°C/watt 1.0 > > > > > > Thermal Time Constant Min 28 > > > > > > Mechanical Time Constant msec 2.7 > > > > > > Electrical Time Constant msec 3.73 > > > > > > Rated Speed @300 volts rpm 4000 > > > > > > Rated Speed @600 volts rpm 8000 > > > > > > Electrical > > > > > > Torque Constant > > > > > > lb-in/amp 6.0 > > > > > > N-m/amp 0.67 > > > > > > Voltage Constant > > > > > > Vpk/krpm 57.5 > > > > > > Vrms/krpm 40.7 > > > > > > Resistance ohms 2.2 > > > > > > Inductance mH 8.2 > > > > > > Mechanical Inertia > > > > > > lb-in-s2 0.00497 > > > > > > Kg-cm2 5.53 > > > > > > Maximum Speed rpm 10,000 > > > > > > Number of Motor Poles 4 > > > > > > Weight lbs/Kg 13/5.9 > > > > > > > > > > > > Does everything look okay to you? > > > > > > > > > > > > Thanks for the power supply links. > > > > > > > > > > > > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here. > > > > > > > > > > > > Thanks again, > > > > > > David. > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > Hi David, > > > > > > > ÃÆ'Æ'‚ÃÆ'‚ > > > > > > > I'm sure you will have no trouble with the C and we can help.ÃÆ'Æ'‚ÃÆ'‚ It mostly involves cutting and pasting and changing parameters. > > > > > > > ÃÆ'Æ'‚ÃÆ'‚ > > > > > > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.ÃÆ'Æ'‚ÃÆ'‚ You must keep the peak supply voltage less than 80V with SnapAmp.ÃÆ'Æ'‚ÃÆ'‚ So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.ÃÆ'Æ'‚ÃÆ'‚ And basically the more power the better.ÃÆ'Æ'‚ÃÆ'‚ You might consider starting out with something like a low cost and lower voltage 48V 300W regulated supply.ÃÆ'Æ'‚ÃÆ'‚ Meanwell sells them for about $60.ÃÆ'Æ'‚ÃÆ'‚ Running at lower voltage will limit your max speed.ÃÆ'Æ'‚ÃÆ'‚ Lower power will limit your max acceleration.ÃÆ'Æ'‚ÃÆ'‚ ÃÆ'Æ'‚ÃÆ'‚ Once everything is working you can go to higher voltage and > > power if necessary.ÃÆ'Æ'‚ÃÆ'‚ ÃÆ'Æ'‚ÃÆ'‚ > > > > > > > ÃÆ'Æ'‚ÃÆ'‚ > > > > > > > http://wattsupply.com/s.nl/sc.30/category.2200/.f > > > > > > > ÃÆ'Æ'‚ÃÆ'‚ > > > > > > > Or unregulated supplies from Antek are popular > > > > > > > ÃÆ'Æ'‚ÃÆ'‚ > > > > > > > http://stores.ebay.com/Antek-inc?_trksid=p2047675.l2563 > > > > > > > ÃÆ'Æ'‚ÃÆ'‚ > > > > > > > HTH > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > Sent: Tuesday, October 9, 2012 5:10 AM > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > ÃÆ'Æ'‚ÃÆ'‚ > > > > > > > > > > > > > > Thanks Tom. > > > > > > > > > > > > > > I am not a C programmer, but have done other languages and am willing to learn the details. Do you suggest any particular power supply to be used with the SnapAmp? Are there certain parameters relating to the power supply that I would have to consider? Is there any step-by-step available that would help me through the process? I will finish going through the CNCzone thread today. > > > > > > > > > > > > > > I started out using Mach3 but am hearing so many horror stories that I would rather stay away from it. The machine Group: DynoMotion Message: 5921 From: daveymahomh600e Date: 10/28/2012 Subject: Re: Help With a Complete System Hi Tom, The motor turns about a half revolution in each direction, but the console report shows 0 for the counts results. I did probe with a voltmeter and there seems to be voltage for the three (ABZ) zones - about 3.5 VDC or so. Thanks, David. --- In DynoMotion@yahoogroups.com, TK <tk@...> wrote: > > Hi David, > > That should work. Does the motor move? Does the position change? Did you check with a voltmeter? > > Regards > TK > > On Oct 28, 2012, at 2:12 PM, "daveymahomh600e" <david.m.stevenson@...> wrote: > > > Hi Tom, > > > > I am having trouble getting my encoder signal to show up when I do the autophasefind thing. It has a Z+Z- connection for the index and I have connected it to pins 19 and 20 of the SnapAmp while working on channel 0. I have set the Z bit to 66, but still no joy. > > > > Is there a better place to connect the index? > > > > Thank you, > > David. > > > > --- In DynoMotion@yahoogroups.com, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > Thanks Tom, > > > > > > They are differential encoders. > > > > > > David > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > Hi David, > > > > > > > > SnapAmp has differential encoder inputs so that would be the best option if your encoders have differential outputs. > > > > > > > > Differential encoders have 4 signals A+ A- B+ B-. Single ended encoders only have A and B > > > > > > > > Regards > > > > TK > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > From: daveymahomh600e <david.m.stevenson@> > > > > To: DynoMotion@yahoogroups.com > > > > Sent: Friday, October 26, 2012 1:37 PM > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > >  > > > > Hello Tom, > > > > > > > > I now have all the parts to start connecting the system together, but I am unsure whether it would be better to connect my incremental encoders to the SnapAmp or the Kflop board? > > > > > > > > Thanks, > > > > David. > > > > > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > > > > > Hi David, > > > > > > > > > > The specification is not clear what the no load voltage is. But I would expect it to be less than 80V. They claim it should work with Geckos which are limited to 80V also. I assume they made a typo that the Caps are rated for only 50V. I suppose you would need to ask them. > > > > > > > > > > Regards > > > > > TK > > > > > > > > > > On Oct 9, 2012, at 5:01 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > Sorry to bother you, but I wanted to confirm that this would be an appropriate power supply for my system... > > > > > > > > > > > > http://www.ebay.com/itm/70V-600W-CNC-Mill-Router-Power-Supply-Gecko-Driver-/370546932025?pt=LH_DefaultDomain_0&hash=item5646517939 > > > > > > > > > > > > Thank you, > > > > > > David. > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > Those motors can each handle peak current of 16A.ÃÆ'‚ With a 70V supply that is about 1100watts.ÃÆ'‚ Just to give you some idea this is about 1.5HP.ÃÆ'‚ But again it depends on what your application really needs.ÃÆ'‚ By setting your acceleration lower you will draw less power.ÃÆ'‚ I would suggest starting with something like a 70V 600W unregulated supply to power both motors.ÃÆ'‚ Later you could add another if needed.ÃÆ'‚ A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth. > > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > Sent: Tuesday, October 9, 2012 2:02 PM > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > ÃÆ'‚ > > > > > > > Hi Tom, > > > > > > > > > > > > > > 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs? > > > > > > > > > > > > > > Thanks very much, > > > > > > > David. > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts). > > > > > > > > > > > > > > > > When a motor turns it acts like a generator with the higher the speed the higher the voltage.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ This parameter tells us that at 1000RPM it will be generating 57.5V.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ The supply voltage has to be higher than this to be able to put energy into the motor.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ So basically with a 70V power supply you will be limited to around 1000RPM.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You need to determine if this is fast enough for your application.ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Otherwise you will need to go with another amplifier that can work at a higher voltage. > > > > > > > > > > > > > > > > Regards > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > Sent: Tuesday, October 9, 2012 1:45 PM > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > Your reply was very helpful. Thank you. > > > > > > > > > > > > > > > > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested. > > > > > > > > > > > > > > > > Here are the specs for the servo... > > > > > > > > Model Number BSM80C-375 > > > > > > > > Continuous Stall Torque > > > > > > > > lb-in 31.9 > > > > > > > > N-m 3.6 > > > > > > > > Continuous Current amps 6.29 > > > > > > > > Peak Torque > > > > > > > > lb-in 95.6 > > > > > > > > N-m 10.8 > > > > > > > > Peak Current amps 16.0 > > > > > > > > Thermal Resistance ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚°C/watt 1.0 > > > > > > > > Thermal Time Constant Min 28 > > > > > > > > Mechanical Time Constant msec 2.7 > > > > > > > > Electrical Time Constant msec 3.73 > > > > > > > > Rated Speed @300 volts rpm 4000 > > > > > > > > Rated Speed @600 volts rpm 8000 > > > > > > > > Electrical > > > > > > > > Torque Constant > > > > > > > > lb-in/amp 6.0 > > > > > > > > N-m/amp 0.67 > > > > > > > > Voltage Constant > > > > > > > > Vpk/krpm 57.5 > > > > > > > > Vrms/krpm 40.7 > > > > > > > > Resistance ohms 2.2 > > > > > > > > Inductance mH 8.2 > > > > > > > > Mechanical Inertia > > > > > > > > lb-in-s2 0.00497 > > > > > > > > Kg-cm2 5.53 > > > > > > > > Maximum Speed rpm 10,000 > > > > > > > > Number of Motor Poles 4 > > > > > > > > Weight lbs/Kg 13/5.9 > > > > > > > > > > > > > > > > Does everything look okay to you? > > > > > > > > > > > > > > > > Thanks for the power supply links. > > > > > > > > > > > > > > > > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here. > > > > > > > > > > > > > > > > Thanks again, > > > > > > > > David. > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > I'm sure you will have no trouble with the C and we can help.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ It mostly involves cutting and pasting and changing parameters. > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You must keep the peak supply voltage less than 80V with SnapAmp.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ And basically the more power the better.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ You might consider starting out with something like a low cost and lower voltage 48V 300W regulated supply.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Meanwell sells them for about $60.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Running at lower voltage will limit your max speed.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Lower power will limit your max acceleration.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ Once everything is working you can go to higher voltage and > > > > power if necessary.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > http://wattsupply.com/s.nl/sc.30/category.2200/.f > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > Or unregulated supplies from Antek are popular > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > http://stores.ebay.com/Antek-inc?_trksid=p2047675.l2563 > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > HTH > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > Sent: Tuesday, October 9, 2012 5:10 AM > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚ > > > > > > > > > > > > > > > > > > Thanks Tom. > > > > > > > > > > > > > > > > > > I am not a C programmer, but have done other languages and am willing to learn the details. Do you suggest any particular power supply to be used with the SnapAmp? Are there certain parameters relating to the power supply that I would have to consider? Is there any step-by-step available that would help me through the process? I will finish going through the CNCzone thread today. > > > > > > > > > > > > > > > > > > I started out using Mach3 but am hearing so many horror stories that I would rather stay away from it. The machine > Group: DynoMotion Message: 5922 From: TK Date: 10/28/2012 Subject: Re: Help With a Complete System Hi David, One signal should be high (~3.5V) but the other should be low. It is hard to catch the z signal in the opposite state because it only changes at one exact shaft position. But A and B should toggle as it moves. Also watch the Axis Screen as it moves. Does the Position count?   You may need to invert the index signal. It sounds like it thinks the index pulse is always present. You can invert it in the software or in hardware by reversing the + and - signals.  Regards TK On Oct 28, 2012, at 2:25 PM, "daveymahomh600e" <david.m.stevenson@...> wrote:   Hi Tom, The motor turns about a half revolution in each direction, but the console report shows 0 for the counts results. I did probe with a voltmeter and there seems to be voltage for the three (ABZ) zones - about 3.5 VDC or so. Thanks, David. --- In DynoMotion@yahoogroups.com, TK <tk@...> wrote: > > Hi David, > > That should work. Does the motor move? Does the position change? Did you check with a voltmeter? > > Regards > TK > > On Oct 28, 2012, at 2:12 PM, "daveymahomh600e" <david.m.stevenson@...> wrote: > > > Hi Tom, > > > > I am having trouble getting my encoder signal to show up when I do the autophasefind thing. It has a Z+Z- connection for the index and I have connected it to pins 19 and 20 of the SnapAmp while working on channel 0. I have set the Z bit to 66, but still no joy. > > > > Is there a better place to connect the index? > > > > Thank you, > > David. > > > > --- In DynoMotion@yahoogroups.com, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > Thanks Tom, > > > > > > They are differential encoders. > > > > > > David > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > Hi David, > > > > > > > > SnapAmp has differential encoder inputs so that would be the best option if your encoders have differential outputs. > > > > > > > > Differential encoders have 4 signals A+ A- B+ B-. Single ended encoders only have A and B > > > > > > > > Regards > > > > TK > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > From: daveymahomh600e <david.m.stevenson@> > > > > To: DynoMotion@yahoogroups.com > > > > Sent: Friday, October 26, 2012 1:37 PM > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > >  > > > > Hello Tom, > > > > > > > > I now have all the parts to start connecting the system together, but I am unsure whether it would be better to connect my incremental encoders to the SnapAmp or the Kflop board? > > > > > > > > Thanks, > > > > David. > > > > > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > > > > > Hi David, > > > > > > > > > > The specification is not clear what the no load voltage is. But I would expect it to be less than 80V. They claim it should work with Geckos which are limited to 80V also. I assume they made a typo that the Caps are rated for only 50V. I suppose you would need to ask them. > > > > > > > > > > Regards > > > > > TK > > > > > > > > > > On Oct 9, 2012, at 5:01 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > Sorry to bother you, but I wanted to confirm that this would be an appropriate power supply for my system... > > > > > > > > > > > > http://www.ebay.com/itm/70V-600W-CNC-Mill-Router-Power-Supply-Gecko-Driver-/370546932025?pt=LH_DefaultDomain_0&hash=item5646517939 > > > > > > > > > > > > Thank you, > > > > > > David. > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > Those motors can each handle peak current of 16A.ÃÆ'‚ With a 70V supply that is about 1100watts.ÃÆ'‚ Just to give you some idea this is about 1.5HP.ÃÆ'‚ But again it depends on what your application really needs.ÃÆ'‚ By setting your acceleration lower you will draw less power.ÃÆ'‚ I would suggest starting with something like a 70V 600W unregulated supply to power both motors.ÃÆ'‚ Later you could add another if needed.ÃÆ'‚ A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth. > > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > Sent: Tuesday, October 9, 2012 2:02 PM > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > ÃÆ'‚ > > > > > > > Hi Tom, > > > > > > > > > > > > > > 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs? > > > > > > > > > > > > > > Thanks very much, > > > > > > > David. > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts). > > > > > > > > > > > > > > > > When a motor turns it acts like a generator with the higher the speed the higher the voltage.ÃÆ'Æ'‚ÃÆ'‚ This parameter tells us that at 1000RPM it will be generating 57.5V.ÃÆ'Æ'‚ÃÆ'‚ The supply voltage has to be higher than this to be able to put energy into the motor.ÃÆ'Æ'‚ÃÆ'‚ So basically with a 70V power supply you will be limited to around 1000RPM.ÃÆ'Æ'‚ÃÆ'‚ You need to determine if this is fast enough for your application.ÃÆ'Æ'‚ÃÆ'‚ Otherwise you will need to go with another amplifier that can work at a higher voltage. > > > > > > > > > > > > > > > > Regards > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > Sent: Tuesday, October 9, 2012 1:45 PM > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'‚ÃÆ'‚ > > > > > > > > > > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > Your reply was very helpful. Thank you. > > > > > > > > > > > > > > > > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested. > > > > > > > > > > > > > > > > Here are the specs for the servo... > > > > > > > > Model Number BSM80C-375 > > > > > > > > Continuous Stall Torque > > > > > > > > lb-in 31.9 > > > > > > > > N-m 3.6 > > > > > > > > Continuous Current amps 6.29 > > > > > > > > Peak Torque > > > > > > > > lb-in 95.6 > > > > > > > > N-m 10.8 > > > > > > > > Peak Current amps 16.0 > > > > > > > > Thermal Resistance ÃÆ'Æ'‚ÃÆ'‚°C/watt 1.0 > > > > > > > > Thermal Time Constant Min 28 > > > > > > > > Mechanical Time Constant msec 2.7 > > > > > > > > Electrical Time Constant msec 3.73 > > > > > > > > Rated Speed @300 volts rpm 4000 > > > > > > > > Rated Speed @600 volts rpm 8000 > > > > > > > > Electrical > > > > > > > > Torque Constant > > > > > > > > lb-in/amp 6.0 > > > > > > > > N-m/amp 0.67 > > > > > > > > Voltage Constant > > > > > > > > Vpk/krpm 57.5 > > > > > > > > Vrms/krpm 40.7 > > > > > > > > Resistance ohms 2.2 > > > > > > > > Inductance mH 8.2 > > > > > > > > Mechanical Inertia > > > > > > > > lb-in-s2 0.00497 > > > > > > > > Kg-cm2 5.53 > > > > > > > > Maximum Speed rpm 10,000 > > > > > > > > Number of Motor Poles 4 > > > > > > > > Weight lbs/Kg 13/5.9 > > > > > > > > > > > > > > > > Does everything look okay to you? > > > > > > > > > > > > > > > > Thanks for the power supply links. > > > > > > > > > > > > > > > > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here. > > > > > > > > > > > > > > > > Thanks again, > > > > > > > > David. > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ÃÆ'‚ > > > > > > > > > I'm sure you will have no trouble with the C and we can help.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ÃÆ'‚ It mostly involves cutting and pasting and changing parameters. > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ÃÆ'‚ > > > > > > > > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ÃÆ'‚ You must keep the peak supply voltage less than 80V with SnapAmp.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ÃÆ'‚ So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ÃÆ'‚ And basically the more power the better.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ÃÆ'ââ‚= Group: DynoMotion Message: 5923 From: daveymahomh600e Date: 10/29/2012 Subject: Re: Help With a Complete System Hello Tom, I tried inverting the index but it didn't help. On the Axis screen, the Position doesn't count. These encoders have the option to also use Hall +/- UVW as output, or as single ended Hall output using just the + side of the UVW pins. Would that be another solution? Thanks, David. --- In DynoMotion@yahoogroups.com, TK <tk@...> wrote: > > Hi David, > > One signal should be high (~3.5V) but the other should be low. It is hard to catch the z signal in the opposite state because it only changes at one exact shaft position. But A and B should toggle as it moves. Also watch the Axis Screen as it moves. Does the Position count? You may need to invert the index signal. It sounds like it thinks the index pulse is always present. You can invert it in the software or in hardware by reversing the + and - signals. > > Regards > TK > > On Oct 28, 2012, at 2:25 PM, "daveymahomh600e" <david.m.stevenson@...> wrote: > > > Hi Tom, > > The motor turns about a half revolution in each direction, but the console report shows 0 for the counts results. > > > > I did probe with a voltmeter and there seems to be voltage for the three (ABZ) zones - about 3.5 VDC or so. > > > > Thanks, > > David. > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > Hi David, > > > > > > That should work. Does the motor move? Does the position change? Did you check with a voltmeter? > > > > > > Regards > > > TK > > > > > > On Oct 28, 2012, at 2:12 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > Hi Tom, > > > > > > > > I am having trouble getting my encoder signal to show up when I do the autophasefind thing. It has a Z+Z- connection for the index and I have connected it to pins 19 and 20 of the SnapAmp while working on channel 0. I have set the Z bit to 66, but still no joy. > > > > > > > > Is there a better place to connect the index? > > > > > > > > Thank you, > > > > David. > > > > > > > > --- In DynoMotion@yahoogroups.com, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > Thanks Tom, > > > > > > > > > > They are differential encoders. > > > > > > > > > > David > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > Hi David, > > > > > > > > > > > > SnapAmp has differential encoder inputs so that would be the best option if your encoders have differential outputs. > > > > > > > > > > > > Differential encoders have 4 signals A+ A- B+ B-. Single ended encoders only have A and B > > > > > > > > > > > > Regards > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > To: DynoMotion@yahoogroups.com > > > > > > Sent: Friday, October 26, 2012 1:37 PM > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > >  > > > > > > Hello Tom, > > > > > > > > > > > > I now have all the parts to start connecting the system together, but I am unsure whether it would be better to connect my incremental encoders to the SnapAmp or the Kflop board? > > > > > > > > > > > > Thanks, > > > > > > David. > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > The specification is not clear what the no load voltage is. But I would expect it to be less than 80V. They claim it should work with Geckos which are limited to 80V also. I assume they made a typo that the Caps are rated for only 50V. I suppose you would need to ask them. > > > > > > > > > > > > > > Regards > > > > > > > TK > > > > > > > > > > > > > > On Oct 9, 2012, at 5:01 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > Sorry to bother you, but I wanted to confirm that this would be an appropriate power supply for my system... > > > > > > > > > > > > > > > > http://www.ebay.com/itm/70V-600W-CNC-Mill-Router-Power-Supply-Gecko-Driver-/370546932025?pt=LH_DefaultDomain_0&hash=item5646517939 > > > > > > > > > > > > > > > > Thank you, > > > > > > > > David. > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > Those motors can each handle peak current of 16A.ÃÆ'Æ'Ã¢â‚¬à ¡ With a 70V supply that is about 1100watts.ÃÆ'Æ'Ã¢â‚¬à ¡ Just to give you some idea this is about 1.5HP.ÃÆ'Æ'Ã¢â‚¬à ¡ But again it depends on what your application really needs.ÃÆ'Æ'Ã¢â‚¬à ¡ By setting your acceleration lower you will draw less power.ÃÆ'Æ'Ã¢â‚¬à ¡ I would suggest starting with something like a 70V 600W unregulated supply to power both motors.ÃÆ'Æ'Ã¢â‚¬à ¡ Later you could add another if needed.ÃÆ'Æ'Ã¢â‚¬à ¡ A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth. > > > > > > > > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > Sent: Tuesday, October 9, 2012 2:02 PM > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ > > > > > > > > > Hi Tom, > > > > > > > > > > > > > > > > > > 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs? > > > > > > > > > > > > > > > > > > Thanks very much, > > > > > > > > > David. > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > > > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts). > > > > > > > > > > > > > > > > > > > > When a motor turns it acts like a generator with the higher the speed the higher the voltage.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ This parameter tells us that at 1000RPM it will be generating 57.5V.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ The supply voltage has to be higher than this to be able to put energy into the motor.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ So basically with a 70V power supply you will be limited to around 1000RPM.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ You need to determine if this is fast enough for your application.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ Otherwise you will need to go with another amplifier that can work at a higher voltage. > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > > Sent: Tuesday, October 9, 2012 1:45 PM > > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > > > > > Your reply was very helpful. Thank you. > > > > > > > > > > > > > > > > > > > > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested. > > > > > > > > > > > > > > > > > > > > Here are the specs for the servo... > > > > > > > > > > Model Number BSM80C-375 > > > > > > > > > > Continuous Stall Torque > > > > > > > > > > lb-in 31.9 > > > > > > > > > > N-m 3.6 > > > > > > > > > > Continuous Current amps 6.29 > > > > > > > > > > Peak Torque > > > > > > > > > > lb-in 95.6 > > > > > > > > > > N-m 10.8 > > > > > > > > > > Peak Current amps 16.0 > > > > > > > > > > Thermal Resistance ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚°C/watt 1.0 > > > > > > > > > > Thermal Time Constant Min 28 > > > > > > > > > > Mechanical Time Constant msec 2.7 > > > > > > > > > > Electrical Time Constant msec 3.73 > > > > > > > > > > Rated Speed @300 volts rpm 4000 > > > > > > > > > > Rated Speed @600 volts rpm 8000 > > > > > > > > > > Electrical > > > > > > > > > > Torque Constant > > > > > > > > > > lb-in/amp 6.0 > > > > > > > > > > N-m/amp 0.67 > > > > > > > > > > Voltage Constant > > > > > > > > > > Vpk/krpm 57.5 > > > > > > > > > > Vrms/krpm 40.7 > > > > > > > > > > Resistance ohms 2.2 > > > > > > > > > > Inductance mH 8.2 > > > > > > > > > > Mechanical Inertia > > > > > > > > > > lb-in-s2 0.00497 > > > > > > > > > > Kg-cm2 5.53 > > > > > > > > > > Maximum Speed rpm 10,000 > > > > > > > > > > Number of Motor Poles 4 > > > > > > > > > > Weight lbs/Kg 13/5.9 > > > > > > > > > > > > > > > > > > > > Does everything look okay to you? > > > > > > > > > > > > > > > > > > > > Thanks for the power supply links. > > > > > > > > > > > > > > > > > > > > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here. > > > > > > > > > > > > > > > > > > > > Thanks again, > > > > > > > > > > David. > > > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ > > > > > > > > > > > I'm sure you will have no trouble with the C and we can help.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ It mostly involves cutting and pasting and changing parameters. > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ > > > > > > > > > > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ You must keep the peak supply voltage less than 80V with SnapAmp.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ And basically the more power the better.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'ââ‚= > Group: DynoMotion Message: 5924 From: TK Date: 10/29/2012 Subject: Re: Help With a Complete System Hi David, I think you should stick with using the encoder.  You ignored the request to check if the signals were toggling. Besides a volt meter you can observe the Digital IO Screen. The first SnapAmp encoder is referenced as encoder input 8.  Do you have the Axis Channel that you are using configured as Input Mode Encoder and the InputChan0 set to 8? Regards TK On Oct 29, 2012, at 6:47 AM, "daveymahomh600e" <david.m.stevenson@...> wrote:   Hello Tom, I tried inverting the index but it didn't help. On the Axis screen, the Position doesn't count. These encoders have the option to also use Hall +/- UVW as output, or as single ended Hall output using just the + side of the UVW pins. Would that be another solution? Thanks, David. --- In DynoMotion@yahoogroups.com, TK <tk@...> wrote: > > Hi David, > > One signal should be high (~3.5V) but the other should be low. It is hard to catch the z signal in the opposite state because it only changes at one exact shaft position. But A and B should toggle as it moves. Also watch the Axis Screen as it moves. Does the Position count? You may need to invert the index signal. It sounds like it thinks the index pulse is always present. You can invert it in the software or in hardware by reversing the + and - signals. > > Regards > TK > > On Oct 28, 2012, at 2:25 PM, "daveymahomh600e" <david.m.stevenson@...> wrote: > > > Hi Tom, > > The motor turns about a half revolution in each direction, but the console report shows 0 for the counts results. > > > > I did probe with a voltmeter and there seems to be voltage for the three (ABZ) zones - about 3.5 VDC or so. > > > > Thanks, > > David. > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > Hi David, > > > > > > That should work. Does the motor move? Does the position change? Did you check with a voltmeter? > > > > > > Regards > > > TK > > > > > > On Oct 28, 2012, at 2:12 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > Hi Tom, > > > > > > > > I am having trouble getting my encoder signal to show up when I do the autophasefind thing. It has a Z+Z- connection for the index and I have connected it to pins 19 and 20 of the SnapAmp while working on channel 0. I have set the Z bit to 66, but still no joy. > > > > > > > > Is there a better place to connect the index? > > > > > > > > Thank you, > > > > David. > > > > > > > > --- In DynoMotion@yahoogroups.com, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > Thanks Tom, > > > > > > > > > > They are differential encoders. > > > > > > > > > > David > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > Hi David, > > > > > > > > > > > > SnapAmp has differential encoder inputs so that would be the best option if your encoders have differential outputs. > > > > > > > > > > > > Differential encoders have 4 signals A+ A- B+ B-. Single ended encoders only have A and B > > > > > > > > > > > > Regards > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > To: DynoMotion@yahoogroups.com > > > > > > Sent: Friday, October 26, 2012 1:37 PM > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > >  > > > > > > Hello Tom, > > > > > > > > > > > > I now have all the parts to start connecting the system together, but I am unsure whether it would be better to connect my incremental encoders to the SnapAmp or the Kflop board? > > > > > > > > > > > > Thanks, > > > > > > David. > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > The specification is not clear what the no load voltage is. But I would expect it to be less than 80V. They claim it should work with Geckos which are limited to 80V also. I assume they made a typo that the Caps are rated for only 50V. I suppose you would need to ask them. > > > > > > > > > > > > > > Regards > > > > > > > TK > > > > > > > > > > > > > > On Oct 9, 2012, at 5:01 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > Sorry to bother you, but I wanted to confirm that this would be an appropriate power supply for my system... > > > > > > > > > > > > > > > > http://www.ebay.com/itm/70V-600W-CNC-Mill-Router-Power-Supply-Gecko-Driver-/370546932025?pt=LH_DefaultDomain_0&hash=item5646517939 > > > > > > > > > > > > > > > > Thank you, > > > > > > > > David. > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > Those motors can each handle peak current of 16A.ÃÆ'Æ'‚ With a 70V supply that is about 1100watts.ÃÆ'Æ'‚ Just to give you some idea this is about 1.5HP.ÃÆ'Æ'‚ But again it depends on what your application really needs.ÃÆ'Æ'‚ By setting your acceleration lower you will draw less power.ÃÆ'Æ'‚ I would suggest starting with something like a 70V 600W unregulated supply to power both motors.ÃÆ'Æ'‚ Later you could add another if needed.ÃÆ'Æ'‚ A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth. > > > > > > > > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > Sent: Tuesday, October 9, 2012 2:02 PM > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'‚ > > > > > > > > > Hi Tom, > > > > > > > > > > > > > > > > > > 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs? > > > > > > > > > > > > > > > > > > Thanks very much, > > > > > > > > > David. > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > > > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts). > > > > > > > > > > > > > > > > > > > > When a motor turns it acts like a generator with the higher the speed the higher the voltage.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ This parameter tells us that at 1000RPM it will be generating 57.5V.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ The supply voltage has to be higher than this to be able to put energy into the motor.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ So basically with a 70V power supply you will be limited to around 1000RPM.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ You need to determine if this is fast enough for your application.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ Otherwise you will need to go with another amplifier that can work at a higher voltage. > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > > Sent: Tuesday, October 9, 2012 1:45 PM > > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > > > > > Your reply was very helpful. Thank you. > > > > > > > > > > > > > > > > > > > > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested. > > > > > > > > > > > > > > > > > > > > Here are the specs for the servo... > > > > > > > > > > Model Number BSM80C-375 > > > > > > > > > > Continuous Stall Torque > > > > > > > > > > lb-in 31.9 > > > > > > > > > > N-m 3.6 > > > > > > > > > > Continuous Current amps 6.29 > > > > > > > > > > Peak Torque > > > > > > > > > > lb-in 95.6 > > > > > > > > > > N-m 10.8 > > > > > > > > > > Peak Current amps 16.0 > > > > > > > > > > Thermal Resistance ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ÃÆ'‚°C/watt 1.0 > > > > > > > > > > Thermal Time Constant Min 28 > > > > > > > > > > Mechanical Time Constant msec 2.7 > > > > > > > > > > Electrical Time Constant msec 3.73 > > > > > > > > > > Rated Speed @300 volts rpm 4000 > > > > > > > > > > Rated Speed @600 volts rpm 8000 > > > > > > > > > > Electrical > > > > > > > > > > Torque Constant > > > > > > > > > > lb-in/amp 6.0 > > > > > > > > > > N-m/amp 0.67 > > > > > > > > > > Voltage Constant > > > > > > > > > > Vpk/krpm 57.5 > > > > > > > > > > Vrms/krpm 40.7 > > > > > > > > > > Resistance ohms 2.2 > > > > > > > > > > Inductance mH 8.2 > > > > > > > > > > Mechanical Inertia > > > > > > > > > > lb-in-s2 0.00497 > > > > > > > > > > Kg-cm2 5.53 > > > > > > > > > > Maximum Speed rpm 10,000 > > > > > > > > > > Number of Motor Poles 4 > > > > > > > > > > Weight lbs/Kg 13/5.9 > > > > > > > > > > > > > > > > > > > > Does everything look okay to you? > > > > > > > > > > > > > > > > > > > > Thanks for the power supply links. > > > > > > > > > > > > > > > > > > > > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here. > > > > > > > > > > > > > > > > > > > > Thanks again, > > > > > > > > > > David. > > > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'¢â€šÂ¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ > > > > > > > > > > > I'm sure you will have no trouble with the C and we can help.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'¢â€šÂ¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ It mostly involves cutting and pasting and changing parameters. > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'¢â€šÂ¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ > > > > > > > > > > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'¢â€šÂ¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ You must keep the peak supply voltage less than 80V with SnapAmp.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'¢â€šÂ¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'¢â€šÂ¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'‚ And basically the more power the better.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'¢â€šÂ¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'ââ‚= > Group: DynoMotion Message: 5925 From: daveymahomh600e Date: 10/29/2012 Subject: Re: Help With a Complete System Hi Tom, The Digital IO screen shows the AB toggle on and off. I had the channel set to 0, setting it to 8 seems to have cured the problem. ;} What will the channel 1 need to be set to? Thanks, David. --- In DynoMotion@yahoogroups.com, TK <tk@...> wrote: > > Hi David, > > I think you should stick with using the encoder. > > You ignored the request to check if the signals were toggling. Besides a volt meter you can observe the Digital IO Screen. > > The first SnapAmp encoder is referenced as encoder input 8. Do you have the Axis Channel that you are using configured as Input Mode Encoder and the InputChan0 set to 8? > > Regards > TK > > On Oct 29, 2012, at 6:47 AM, "daveymahomh600e" <david.m.stevenson@...> wrote: > > > Hello Tom, > > > > I tried inverting the index but it didn't help. On the Axis screen, the Position doesn't count. > > These encoders have the option to also use Hall +/- UVW as output, or as single ended Hall output using just the + side of the UVW pins. Would that be another solution? > > > > Thanks, > > David. > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > Hi David, > > > > > > One signal should be high (~3.5V) but the other should be low. It is hard to catch the z signal in the opposite state because it only changes at one exact shaft position. But A and B should toggle as it moves. Also watch the Axis Screen as it moves. Does the Position count? You may need to invert the index signal. It sounds like it thinks the index pulse is always present. You can invert it in the software or in hardware by reversing the + and - signals. > > > > > > Regards > > > TK > > > > > > On Oct 28, 2012, at 2:25 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > Hi Tom, > > > > The motor turns about a half revolution in each direction, but the console report shows 0 for the counts results. > > > > > > > > I did probe with a voltmeter and there seems to be voltage for the three (ABZ) zones - about 3.5 VDC or so. > > > > > > > > Thanks, > > > > David. > > > > > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > > > > > Hi David, > > > > > > > > > > That should work. Does the motor move? Does the position change? Did you check with a voltmeter? > > > > > > > > > > Regards > > > > > TK > > > > > > > > > > On Oct 28, 2012, at 2:12 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > Hi Tom, > > > > > > > > > > > > I am having trouble getting my encoder signal to show up when I do the autophasefind thing. It has a Z+Z- connection for the index and I have connected it to pins 19 and 20 of the SnapAmp while working on channel 0. I have set the Z bit to 66, but still no joy. > > > > > > > > > > > > Is there a better place to connect the index? > > > > > > > > > > > > Thank you, > > > > > > David. > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > > > > Thanks Tom, > > > > > > > > > > > > > > They are differential encoders. > > > > > > > > > > > > > > David > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > SnapAmp has differential encoder inputs so that would be the best option if your encoders have differential outputs. > > > > > > > > > > > > > > > > Differential encoders have 4 signals A+ A- B+ B-.ÃÆ'‚ Single ended encoders only have A and B > > > > > > > > > > > > > > > > Regards > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > Sent: Friday, October 26, 2012 1:37 PM > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'‚ > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > I now have all the parts to start connecting the system together, but I am unsure whether it would be better to connect my incremental encoders to the SnapAmp or the Kflop board? > > > > > > > > > > > > > > > > Thanks, > > > > > > > > David. > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > The specification is not clear what the no load voltage is. But I would expect it to be less than 80V. They claim it should work with Geckos which are limited to 80V also. I assume they made a typo that the Caps are rated for only 50V. I suppose you would need to ask them. > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > TK > > > > > > > > > > > > > > > > > > On Oct 9, 2012, at 5:01 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > > > > > Sorry to bother you, but I wanted to confirm that this would be an appropriate power supply for my system... > > > > > > > > > > > > > > > > > > > > http://www.ebay.com/itm/70V-600W-CNC-Mill-Router-Power-Supply-Gecko-Driver-/370546932025?pt=LH_DefaultDomain_0&hash=item5646517939 > > > > > > > > > > > > > > > > > > > > Thank you, > > > > > > > > > > David. > > > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > > > > > Those motors can each handle peak current of 16A.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ With a 70V supply that is about 1100watts.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ Just to give you some idea this is about 1.5HP.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ But again it depends on what your application really needs.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ By setting your acceleration lower you will draw less power.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ I would suggest starting with something like a 70V 600W unregulated supply to power both motors.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ Later you could add another if needed.ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > > > Sent: Tuesday, October 9, 2012 2:02 PM > > > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ > > > > > > > > > > > Hi Tom, > > > > > > > > > > > > > > > > > > > > > > 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs? > > > > > > > > > > > > > > > > > > > > > > Thanks very much, > > > > > > > > > > > David. > > > > > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > > > > > > > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts). > > > > > > > > > > > > > > > > > > > > > > > > When a motor turns it acts like a generator with the higher the speed the higher the voltage.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ This parameter tells us that at 1000RPM it will be generating 57.5V.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ The supply voltage has to be higher than this to be able to put energy into the motor.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ So basically with a 70V power supply you will be limited to around 1000RPM.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ You need to determine if this is fast enough for your application.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ Otherwise you will need to go with another amplifier that can work at a higher voltage. > > > > > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > > > > Sent: Tuesday, October 9, 2012 1:45 PM > > > > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > > > > > > > > > Your reply was very helpful. Thank you. > > > > > > > > > > > > > > > > > > > > > > > > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested. > > > > > > > > > > > > > > > > > > > > > > > > Here are the specs for the servo... > > > > > > > > > > > > Model Number BSM80C-375 > > > > > > > > > > > > Continuous Stall Torque > > > > > > > > > > > > lb-in 31.9 > > > > > > > > > > > > N-m 3.6 > > > > > > > > > > > > Continuous Current amps 6.29 > > > > > > > > > > > > Peak Torque > > > > > > > > > > > > lb-in 95.6 > > > > > > > > > > > > N-m 10.8 > > > > > > > > > > > > Peak Current amps 16.0 > > > > > > > > > > > > Thermal Resistance ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚°C/watt 1.0 > > > > > > > > > > > > Thermal Time Constant Min 28 > > > > > > > > > > > > Mechanical Time Constant msec 2.7 > > > > > > > > > > > > Electrical Time Constant msec 3.73 > > > > > > > > > > > > Rated Speed @300 volts rpm 4000 > > > > > > > > > > > > Rated Speed @600 volts rpm 8000 > > > > > > > > > > > > Electrical > > > > > > > > > > > > Torque Constant > > > > > > > > > > > > lb-in/amp 6.0 > > > > > > > > > > > > N-m/amp 0.67 > > > > > > > > > > > > Voltage Constant > > > > > > > > > > > > Vpk/krpm 57.5 > > > > > > > > > > > > Vrms/krpm 40.7 > > > > > > > > > > > > Resistance ohms 2.2 > > > > > > > > > > > > Inductance mH 8.2 > > > > > > > > > > > > Mechanical Inertia > > > > > > > > > > > > lb-in-s2 0.00497 > > > > > > > > > > > > Kg-cm2 5.53 > > > > > > > > > > > > Maximum Speed rpm 10,000 > > > > > > > > > > > > Number of Motor Poles 4 > > > > > > > > > > > > Weight lbs/Kg 13/5.9 > > > > > > > > > > > > > > > > > > > > > > > > Does everything look okay to you? > > > > > > > > > > > > > > > > > > > > > > > > Thanks for the power supply links. > > > > > > > > > > > > > > > > > > > > > > > > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here. > > > > > > > > > > > > > > > > > > > > > > > > Thanks again, > > > > > > > > > > > > David. > > > > > > > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ > > > > > > > > > > > > > I'm sure you will have no trouble with the C and we can help.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ It mostly involves cutting and pasting and changing parameters. > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ > > > > > > > > > > > > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ You must keep the peak supply voltage less than 80V with SnapAmp.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ And basically the more power the better.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚= > > > > > > > > Group: DynoMotion Message: 5926 From: Tom Kerekes Date: 10/29/2012 Subject: Re: Help With a Complete System Hi David, It depends where you wire in the next encoder.  The 4 encoder inputs on a first SnapAmp are referenced as 8,9,10,11.  But I believe you wired a Z index to encoder 9 A input so you will need to skip 9 and use 10. Regards TK Group: DynoMotion Message: 5927 From: daveymahomh600e Date: 10/29/2012 Subject: Re: Help With a Complete System Thanks Tom. --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote: > > Hi David, > > It depends where you wire in the next encoder.  The 4 encoder inputs on a first SnapAmp are referenced as 8,9,10,11.  But I believe you wired a Z index to encoder 9 A input so you will need to skip 9 and use 10. > > Regards > TK > > > > > ________________________________ > From: daveymahomh600e <david.m.stevenson@...> > To: DynoMotion@yahoogroups.com > Sent: Monday, October 29, 2012 9:12 AM > Subject: [DynoMotion] Re: Help With a Complete System > > >   > Hi Tom, > The Digital IO screen shows the AB toggle on and off. I had the channel set to 0, setting it to 8 seems to have cured the problem. ;} > What will the channel 1 need to be set to? > > Thanks, > David. > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > Hi David, > > > > I think you should stick with using the encoder. > > > > You ignored the request to check if the signals were toggling. Besides a volt meter you can observe the Digital IO Screen. > > > > The first SnapAmp encoder is referenced as encoder input 8. Do you have the Axis Channel that you are using configured as Input Mode Encoder and the InputChan0 set to 8? > > > > Regards > > TK > > > > On Oct 29, 2012, at 6:47 AM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > Hello Tom, > > > > > > I tried inverting the index but it didn't help. On the Axis screen, the Position doesn't count. > > > These encoders have the option to also use Hall +/- UVW as output, or as single ended Hall output using just the + side of the UVW pins. Would that be another solution? > > > > > > Thanks, > > > David. > > > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > > > Hi David, > > > > > > > > One signal should be high (~3.5V) but the other should be low. It is hard to catch the z signal in the opposite state because it only changes at one exact shaft position. But A and B should toggle as it moves. Also watch the Axis Screen as it moves. Does the Position count? You may need to invert the index signal. It sounds like it thinks the index pulse is always present. You can invert it in the software or in hardware by reversing the + and - signals. > > > > > > > > Regards > > > > TK > > > > > > > > On Oct 28, 2012, at 2:25 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > Hi Tom, > > > > > The motor turns about a half revolution in each direction, but the console report shows 0 for the counts results. > > > > > > > > > > I did probe with a voltmeter and there seems to be voltage for the three (ABZ) zones - about 3.5 VDC or so. > > > > > > > > > > Thanks, > > > > > David. > > > > > > > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > > > > > > > Hi David, > > > > > > > > > > > > That should work. Does the motor move? Does the position change? Did you check with a voltmeter? > > > > > > > > > > > > Regards > > > > > > TK > > > > > > > > > > > > On Oct 28, 2012, at 2:12 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > > > Hi Tom, > > > > > > > > > > > > > > I am having trouble getting my encoder signal to show up when I do the autophasefind thing. It has a Z+Z- connection for the index and I have connected it to pins 19 and 20 of the SnapAmp while working on channel 0. I have set the Z bit to 66, but still no joy. > > > > > > > > > > > > > > Is there a better place to connect the index? > > > > > > > > > > > > > > Thank you, > > > > > > > David. > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > > > > > > Thanks Tom, > > > > > > > > > > > > > > > > They are differential encoders. > > > > > > > > > > > > > > > > David > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > SnapAmp has differential encoder inputs so that would be the best option if your encoders have differential outputs. > > > > > > > > > > > > > > > > > > Differential encoders have 4 signals A+ A- B+ B-.ÃÆ'Æ'Ã¢â‚¬à ¡ Single ended encoders only have A and B > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > Sent: Friday, October 26, 2012 1:37 PM > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > > > I now have all the parts to start connecting the system together, but I am unsure whether it would be better to connect my incremental encoders to the SnapAmp or the Kflop board? > > > > > > > > > > > > > > > > > > Thanks, > > > > > > > > > David. > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > > > The specification is not clear what the no load voltage is. But I would expect it to be less than 80V. They claim it should work with Geckos which are limited to 80V also. I assume they made a typo that the Caps are rated for only 50V. I suppose you would need to ask them. > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > On Oct 9, 2012, at 5:01 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > > > > > > > Sorry to bother you, but I wanted to confirm that this would be an appropriate power supply for my system... > > > > > > > > > > > > > > > > > > > > > > http://www.ebay.com/itm/70V-600W-CNC-Mill-Router-Power-Supply-Gecko-Driver-/370546932025?pt=LH_DefaultDomain_0&hash=item5646517939 > > > > > > > > > > > > > > > > > > > > > > Thank you, > > > > > > > > > > > David. > > > > > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > > > > > > > Those motors can each handle peak current of 16A.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ With a 70V supply that is about 1100watts.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ Just to give you some idea this is about 1.5HP.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ But again it depends on what your application really needs.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ By setting your acceleration lower you will draw less power.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ I would suggest starting with something like a 70V 600W unregulated supply to power both motors.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ Later you could add another > if needed.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > > > > Sent: Tuesday, October 9, 2012 2:02 PM > > > > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ > > > > > > > > > > > > Hi Tom, > > > > > > > > > > > > > > > > > > > > > > > > 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs? > > > > > > > > > > > > > > > > > > > > > > > > Thanks very much, > > > > > > > > > > > > David. > > > > > > > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > > > > > > > > > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts). > > > > > > > > > > > > > > > > > > > > > > > > > > When a motor turns it acts like a generator with the higher the speed the higher the voltage.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ This parameter tells us that at 1000RPM it will be generating 57.5V.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ The supply voltage has to be higher than this to be able to put energy into the motor.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†> 'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ So basically with a 70V power supply you will be limited to around 1000RPM.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ You need to determine if this is fast enough for your application.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ Otherwise you will need > to go with another amplifier that can work at a higher voltage. > > > > > > > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > > > > > Sent: Tuesday, October 9, 2012 1:45 PM > > > > > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > > > > > > > > > > > Your reply was very helpful. Thank you. > > > > > > > > > > > > > > > > > > > > > > > > > > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested. > > > > > > > > > > > > > > > > > > > > > > > > > > Here are the specs for the servo... > > > > > > > > > > > > > Model Number BSM80C-375 > > > > > > > > > > > > > Continuous Stall Torque > > > > > > > > > > > > > lb-in 31.9 > > > > > > > > > > > > > N-m 3.6 > > > > > > > > > > > > > Continuous Current amps 6.29 > > > > > > > > > > > > > Peak Torque > > > > > > > > > > > > > lb-in 95.6 > > > > > > > > > > > > > N-m 10.8 > > > > > > > > > > > > > Peak Current amps 16.0 > > > > > > > > > > > > > Thermal Resistance ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚°C/watt 1.0 > > > > > > > > > > > > > Thermal Time Constant Min 28 > > > > > > > > > > > > > Mechanical Time Constant msec 2.7 > > > > > > > > > > > > > Electrical Time Constant msec 3.73 > > > > > > > > > > > > > Rated Speed @300 volts rpm 4000 > > > > > > > > > > > > > Rated Speed @600 volts rpm 8000 > > > > > > > > > > > > > Electrical > > > > > > > > > > > > > Torque Constant > > > > > > > > > > > > > lb-in/amp 6.0 > > > > > > > > > > > > > N-m/amp 0.67 > > > > > > > > > > > > > Voltage Constant > > > > > > > > > > > > > Vpk/krpm 57.5 > > > > > > > > > > > > > Vrms/krpm 40.7 > > > > > > > > > > > > > Resistance ohms 2.2 > > > > > > > > > > > > > Inductance mH 8.2 > > > > > > > > > > > > > Mechanical Inertia > > > > > > > > > > > > > lb-in-s2 0.00497 > > > > > > > > > > > > > Kg-cm2 5.53 > > > > > > > > > > > > > Maximum Speed rpm 10,000 > > > > > > > > > > > > > Number of Motor Poles 4 > > > > > > > > > > > > > Weight lbs/Kg 13/5.9 > > > > > > > > > > > > > > > > > > > > > > > > > > Does everything look okay to you? > > > > > > > > > > > > > > > > > > > > > > > > > > Thanks for the power supply links. > > > > > > > > > > > > > > > > > > > > > > > > > > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here. > > > > > > > > > > > > > > > > > > > > > > > > > > Thanks again, > > > > > > > > > > > > > David. > > > > > > > > > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ > > > > > > > > > > > > > > I'm sure you will have no trouble with the C and we can help.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ It mostly involves cutting and pasting and changing parameters. > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ > > > > > > > > > > > > > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ You must keep the peak supply voltage less than 80V with SnapAmp.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ > 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ > 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ And basically the more power the better.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ > 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡= > > > > > > > > > > > > > Group: DynoMotion Message: 5928 From: daveymahomh600e Date: 10/29/2012 Subject: Re: Help With a Complete System Hi Tom, I understand there are a bunch of programs to run at startup to get the system running properly... HomeBrushless, set the peak and clamp limits for the SnapAmp, etc. Is the Initialization file the place to do this, all in one shot? Thanks, David. --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote: > > Hi David, > > It depends where you wire in the next encoder.  The 4 encoder inputs on a first SnapAmp are referenced as 8,9,10,11.  But I believe you wired a Z index to encoder 9 A input so you will need to skip 9 and use 10. > > Regards > TK > > > > > ________________________________ > From: daveymahomh600e <david.m.stevenson@...> > To: DynoMotion@yahoogroups.com > Sent: Monday, October 29, 2012 9:12 AM > Subject: [DynoMotion] Re: Help With a Complete System > > >   > Hi Tom, > The Digital IO screen shows the AB toggle on and off. I had the channel set to 0, setting it to 8 seems to have cured the problem. ;} > What will the channel 1 need to be set to? > > Thanks, > David. > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > Hi David, > > > > I think you should stick with using the encoder. > > > > You ignored the request to check if the signals were toggling. Besides a volt meter you can observe the Digital IO Screen. > > > > The first SnapAmp encoder is referenced as encoder input 8. Do you have the Axis Channel that you are using configured as Input Mode Encoder and the InputChan0 set to 8? > > > > Regards > > TK > > > > On Oct 29, 2012, at 6:47 AM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > Hello Tom, > > > > > > I tried inverting the index but it didn't help. On the Axis screen, the Position doesn't count. > > > These encoders have the option to also use Hall +/- UVW as output, or as single ended Hall output using just the + side of the UVW pins. Would that be another solution? > > > > > > Thanks, > > > David. > > > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > > > Hi David, > > > > > > > > One signal should be high (~3.5V) but the other should be low. It is hard to catch the z signal in the opposite state because it only changes at one exact shaft position. But A and B should toggle as it moves. Also watch the Axis Screen as it moves. Does the Position count? You may need to invert the index signal. It sounds like it thinks the index pulse is always present. You can invert it in the software or in hardware by reversing the + and - signals. > > > > > > > > Regards > > > > TK > > > > > > > > On Oct 28, 2012, at 2:25 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > Hi Tom, > > > > > The motor turns about a half revolution in each direction, but the console report shows 0 for the counts results. > > > > > > > > > > I did probe with a voltmeter and there seems to be voltage for the three (ABZ) zones - about 3.5 VDC or so. > > > > > > > > > > Thanks, > > > > > David. > > > > > > > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > > > > > > > Hi David, > > > > > > > > > > > > That should work. Does the motor move? Does the position change? Did you check with a voltmeter? > > > > > > > > > > > > Regards > > > > > > TK > > > > > > > > > > > > On Oct 28, 2012, at 2:12 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > > > Hi Tom, > > > > > > > > > > > > > > I am having trouble getting my encoder signal to show up when I do the autophasefind thing. It has a Z+Z- connection for the index and I have connected it to pins 19 and 20 of the SnapAmp while working on channel 0. I have set the Z bit to 66, but still no joy. > > > > > > > > > > > > > > Is there a better place to connect the index? > > > > > > > > > > > > > > Thank you, > > > > > > > David. > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > > > > > > Thanks Tom, > > > > > > > > > > > > > > > > They are differential encoders. > > > > > > > > > > > > > > > > David > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > SnapAmp has differential encoder inputs so that would be the best option if your encoders have differential outputs. > > > > > > > > > > > > > > > > > > Differential encoders have 4 signals A+ A- B+ B-.ÃÆ'Æ'Ã¢â‚¬à ¡ Single ended encoders only have A and B > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > Sent: Friday, October 26, 2012 1:37 PM > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Ã¢â‚¬à ¡ > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > > > I now have all the parts to start connecting the system together, but I am unsure whether it would be better to connect my incremental encoders to the SnapAmp or the Kflop board? > > > > > > > > > > > > > > > > > > Thanks, > > > > > > > > > David. > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, TK <tk@> wrote: > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > > > The specification is not clear what the no load voltage is. But I would expect it to be less than 80V. They claim it should work with Geckos which are limited to 80V also. I assume they made a typo that the Caps are rated for only 50V. I suppose you would need to ask them. > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > On Oct 9, 2012, at 5:01 PM, "daveymahomh600e" <david.m.stevenson@> wrote: > > > > > > > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > > > > > > > Sorry to bother you, but I wanted to confirm that this would be an appropriate power supply for my system... > > > > > > > > > > > > > > > > > > > > > > http://www.ebay.com/itm/70V-600W-CNC-Mill-Router-Power-Supply-Gecko-Driver-/370546932025?pt=LH_DefaultDomain_0&hash=item5646517939 > > > > > > > > > > > > > > > > > > > > > > Thank you, > > > > > > > > > > > David. > > > > > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > > > > > > > Those motors can each handle peak current of 16A.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ With a 70V supply that is about 1100watts.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ Just to give you some idea this is about 1.5HP.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ But again it depends on what your application really needs.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ By setting your acceleration lower you will draw less power.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ I would suggest starting with something like a 70V 600W unregulated supply to power both motors.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ Later you could add another > if needed.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ A nice feature of SnapAmp is that it can plot the supply voltage so you can see exactly what the supply is doing during acceleration and so forth. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > > > > Sent: Tuesday, October 9, 2012 2:02 PM > > > > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ > > > > > > > > > > > > Hi Tom, > > > > > > > > > > > > > > > > > > > > > > > > 1000 rpm is about 3x faster than I require for this machine anyway. I have been browsing the power supplies ,but am a little confused still. Could you suggest an appropriate size based upon the motor's specs? > > > > > > > > > > > > > > > > > > > > > > > > Thanks very much, > > > > > > > > > > > > David. > > > > > > > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > > > > > > > > > > > > > The only issue I see is the motor voltage (Vpk/krpm 57.5 Volts). > > > > > > > > > > > > > > > > > > > > > > > > > > When a motor turns it acts like a generator with the higher the speed the higher the voltage.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ This parameter tells us that at 1000RPM it will be generating 57.5V.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ The supply voltage has to be higher than this to be able to put energy into the motor.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†> 'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ So basically with a 70V power supply you will be limited to around 1000RPM.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ You need to determine if this is fast enough for your application.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ Otherwise you will need > to go with another amplifier that can work at a higher voltage. > > > > > > > > > > > > > > > > > > > > > > > > > > Regards > > > > > > > > > > > > > TK > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ________________________________ > > > > > > > > > > > > > From: daveymahomh600e <david.m.stevenson@> > > > > > > > > > > > > > To: DynoMotion@yahoogroups.com > > > > > > > > > > > > > Sent: Tuesday, October 9, 2012 1:45 PM > > > > > > > > > > > > > Subject: [DynoMotion] Re: Help With a Complete System > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Hello Tom, > > > > > > > > > > > > > > > > > > > > > > > > > > Your reply was very helpful. Thank you. > > > > > > > > > > > > > > > > > > > > > > > > > > I expected the code exists and it would mostly be a matter of collecting the right chunks of it, as you suggested. > > > > > > > > > > > > > > > > > > > > > > > > > > Here are the specs for the servo... > > > > > > > > > > > > > Model Number BSM80C-375 > > > > > > > > > > > > > Continuous Stall Torque > > > > > > > > > > > > > lb-in 31.9 > > > > > > > > > > > > > N-m 3.6 > > > > > > > > > > > > > Continuous Current amps 6.29 > > > > > > > > > > > > > Peak Torque > > > > > > > > > > > > > lb-in 95.6 > > > > > > > > > > > > > N-m 10.8 > > > > > > > > > > > > > Peak Current amps 16.0 > > > > > > > > > > > > > Thermal Resistance ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Å¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚°C/watt 1.0 > > > > > > > > > > > > > Thermal Time Constant Min 28 > > > > > > > > > > > > > Mechanical Time Constant msec 2.7 > > > > > > > > > > > > > Electrical Time Constant msec 3.73 > > > > > > > > > > > > > Rated Speed @300 volts rpm 4000 > > > > > > > > > > > > > Rated Speed @600 volts rpm 8000 > > > > > > > > > > > > > Electrical > > > > > > > > > > > > > Torque Constant > > > > > > > > > > > > > lb-in/amp 6.0 > > > > > > > > > > > > > N-m/amp 0.67 > > > > > > > > > > > > > Voltage Constant > > > > > > > > > > > > > Vpk/krpm 57.5 > > > > > > > > > > > > > Vrms/krpm 40.7 > > > > > > > > > > > > > Resistance ohms 2.2 > > > > > > > > > > > > > Inductance mH 8.2 > > > > > > > > > > > > > Mechanical Inertia > > > > > > > > > > > > > lb-in-s2 0.00497 > > > > > > > > > > > > > Kg-cm2 5.53 > > > > > > > > > > > > > Maximum Speed rpm 10,000 > > > > > > > > > > > > > Number of Motor Poles 4 > > > > > > > > > > > > > Weight lbs/Kg 13/5.9 > > > > > > > > > > > > > > > > > > > > > > > > > > Does everything look okay to you? > > > > > > > > > > > > > > > > > > > > > > > > > > Thanks for the power supply links. > > > > > > > > > > > > > > > > > > > > > > > > > > I read through a bunch of your threads at CNCzone.com and I believe I am certainly on the right track here. > > > > > > > > > > > > > > > > > > > > > > > > > > Thanks again, > > > > > > > > > > > > > David. > > > > > > > > > > > > > > > > > > > > > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > > > Hi David, > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ > > > > > > > > > > > > > > I'm sure you will have no trouble with the C and we can help.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ It mostly involves cutting and pasting and changing parameters. > > > > > > > > > > > > > > ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ > > > > > > > > > > > > > > With respect to the power supply you would need to look at the voltage and power requirements for your motors.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ You must keep the peak supply voltage less than 80V with SnapAmp.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ > 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ So if you choose an unregulated supply it must have an unloaded voltage of less than 80V.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ > 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ And basically the more power the better.ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'¢â‚¬ > 'ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¢ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡Ã‚Â¬ÃÆ'…¡ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¬ÃÆ'Æ'Æ'ÃÆ'¢â‚¬Â¦ÃÆ'Æ'Ã¢â‚¬à ¡ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'†'ÃÆ'Æ'Æ'ÃÆ'‚¢ÃÆ'Æ'¢ÃÆ'¢â‚¬Å¡ÃÆ'‚¬ÃÆ'Æ'…ÃÆ'‚¡ÃÆ'Æ'Æ'ÃÆ'†'ÃÆ'Æ'¢ÃÆ'Â¢Ã¢â‚¬à ¡= > > > > > > > > > > > > > Group: DynoMotion Message: 5929 From: Tom Kerekes Date: 10/29/2012 Subject: Re: Help With a Complete System Hi David,   Most likely yes, but it depends on how you want your system initialized.  Some users like to have separate Initialization and Home processes.   Regards TK