Hi Tom
The power supply i am using is a unregulated toroidal supply from keling. It only has + and - on the output. there is no ground. You can see these supplys at there site in the power supplys section if you need to. It worked with my old k-motion board with the plus to v+ and the minus to ground just fine. Also you said to set peak current to 6 amps. The motors are rated for 4 amps continuous for 50 oz/in and 400 oz/in peak but not sure what that means for peak amps. I am asking just to see if I can supply a higher peak current to maybe get a little better performance. The old board moved things around just fine but one of the axis is now r&p and I can see where a little more peak current might give it a short boost when it first starts moving. Thank you.
Jared

--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi Jared,
>  
> Yes you can connect one supply to both "sides" of SnapAmp.  Its not really a good idea to have motor power applied without logic power.  So it is best to apply logic power first then apply motor power and on shut down remove motor power first then shut down KFLOP+SnapAmp.  But the under-voltage lockout on SnapAmp should protect things if you do it in a different sequence.
>  
> You concern me a bit when you describe your supply as + or - 54V.  SnapAmp only wants a single +54V supply plus ground (two wires).
>  
> Since you were running your motors from the KMotion board which had a peak current limit of 5A set SnapAmp to the setting of 10 (6Amps).
>  
> Wiring in the index pulse can help increase the accuracy of homing.  You would need to change your homing routine to do something like move until it detects a switch then continue until it sees the index pulse.
>  
> Regards
> TK
>
> From: judrandom <judrandom@...>
> To: DynoMotion@yahoogroups.com
> Sent: Saturday, November 19, 2011 11:16 PM
> Subject: [DynoMotion] Re: Thank you. Ready to get started!
>
>
>  
> Hi Tom
> Next few questions are. My power supply has only one output. How do I connect to the snap amp? I used the encoder, 5v , and ground from the ribbon connectors. I just want to make sure there's no hiccups before applying motor power. Also the motor supply is turned on by plugging in the supply. Is there a better way to do this? I am assuming this should all work like it did with the old board? The supply is +or- 54v at 13 amps. What should the peak motor current be set to in snap amp? And last I found out my encoders do have an index pulse. Will hooking them up help with accuracy? If not what would be the point off using them? Thanks again.
> Jared
>
> --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> >
> > Hi Jared,
> >  
> > You can try that, but it isn't ideal.  KFLOP references the encoder inputs to its ground, so any noise between KFLOP and the power supply will be added to the encoder signals.  It is only a short wire so it may work fine but it would be better to originate from a KFLOP ground such as the ground lug or a ground from JP4, JP5, or JP6.
> >  
> > Regards
> > TK
> >
> > From: judrandom <judrandom@>
> > To: DynoMotion@yahoogroups.com
> > Sent: Saturday, November 19, 2011 8:12 AM
> > Subject: [DynoMotion] Re: Thank you. Ready to get started!
> >
> >
> >  
> > Hi again Tom
> > I am using a pc power supply to k-flop through the molex. If l pull my 5v from the same supply on different outputs from the supply will that work? Will I still need to add a ground to k-flop or is it sufficient to just get it from the same supply. Thanks.
> > Jared
> >
> > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> > >
> > > Hi Jared,
> > >  
> > > SnapAmp has differential encoder inputs so if you have differential encoders then it would be best to make use of those.  Otherwise the single ended inputs on the RJ45 connector will work.  I would use the same +5V supply that is powering KFLOP+SnapAmp to power the encoders.  If you decide to use a separate +5V Supply for the encoders you must connect a common ground with KFLOP.
> > >  
> > > Regards
> > > TK
> > >
> > > From: judrandom <judrandom@>
> > > To: DynoMotion@yahoogroups.com
> > > Sent: Friday, November 18, 2011 10:26 PM
> > > Subject: [DynoMotion] Thank you. Ready to get started!
> > >
> > >
> > >  
> > > Hi Tom
> > > Thanks for everything. I have the new board mounted and am ready to start wiring things up. The first of many questions. Can I use the rj45 jack on the k-flop to hookup my encoders? Also can I just power them from an external power supply? If so that would make things much easier for me to begin with. Thank you.
> > > Jared
> > >
> >
>