Hi Chris,
No Geckos are designed to close the loop themselves and just be told where to go via Step/Direction. You could go that route and use the KFLOP Step/Direction outputs, but the system would then be basically open loop from KFLOP's standpoint and you wouldn't really need Kanalog.
I don't know of a specific source for Analog input Servo Drives.
These are popular:
Anyone know of a good source??
Thanks
TK
| Group: DynoMotion |
Message: 362 |
From: dunncl66 |
Date: 5/7/2010 |
| Subject: Re: Drive Info |
Thanks for the info. If I go this route, would suggest using a PWM signal or sticking with the +/- 10 VDC to drive the servo amps?
Chris
--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi Chris,
>
> No Geckos are designed to close the loop themselves and just be told where to go via Step/Direction. You could go that route and use the KFLOP Step/Direction outputs, but the system would then be basically open loop from KFLOP's standpoint and you wouldn't really need Kanalog.
>
> I don't know of a specific source for Analog input Servo Drives. Â
>
> These are popular:
>
> http://www.a-m-c.com/download/datasheet/20a20.pdf
>
> Anyone know of a good source??
>
> Thanks
> TKÂ
>
>
>
>
> ________________________________
> From: dunncl66 <dunncl66@...>
> To: DynoMotion@yahoogroups.com
> Sent: Thu, May 6, 2010 5:49:51 AM
> Subject: [DynoMotion] Drive Info
>
> Â
> I have found one of my Getty's N360 servo drives to be bad. I now want to replace all of them with new drives. Do you have any recommendations on what drives work well with KFlop/KAnalog/ Mach3 for a 7 Hp 3 axis mill with 90v servos? If I use Geckos or Vipers, will they work if I leave the encoder feedback to the KAnalog and not directly to the drive?
>
> Thanks, Chris
> |
|
| Group: DynoMotion |
Message: 364 |
From: Tom Kerekes |
Date: 5/7/2010 |
| Subject: Re: Drive Info |
Hi Chris,
+/-10 V analog to servo amps is probably the simplest way to go.
TK
| Group: DynoMotion |
Message: 365 |
From: dunncl66@yahoo.com |
Date: 5/7/2010 |
| Subject: Re: Drive Info |
Tom, Say a fellow found a deal on some PWM versions. Would it work? Sorry to keep bugging you. Chris Sent from my BlackBerry® smartphone
From: Tom Kerekes <tk@...>
Date: Fri, 7 May 2010 09:11:55 -0700 (PDT) To: <DynoMotion@yahoogroups.com> Subject: Re: [DynoMotion] Re: Drive Info
Hi Chris,
+/-10 V analog to servo amps is probably the simplest way to go.
TK
| Group: DynoMotion |
Message: 367 |
From: Tom Kerekes |
Date: 5/7/2010 |
| Subject: Re: Drive Info |
Hi Chris,
Not sure exactly what you mean by PWM Version. But Yes KFlop has 4 8-bit PWM outputs 3.3V TTL @ 60KHZ max or lower (30KHz, 20KHz...)
You need a small user program to drive them.
TK
| Group: DynoMotion |
Message: 368 |
From: dunncl66 |
Date: 5/7/2010 |
| Subject: Re: Drive Info |
Tom,
The Advanced Motion Controls BD30A8 is what I am calling the "PWM Version".
http://www.a-m-c.com/content/prods/descriptions/drives/pwm_input.html
Again thanks for the help.
Chris
--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi Chris,
>
> Not sure exactly what you mean by PWM Version. But Yes KFlop has 4 8-bit PWM outputs 3.3V TTL @ 60KHZ max or lower (30KHz, 20KHz...)
>
> You need a small user program to drive them.
>
> TK
>
>
>
>
> ________________________________
> From: "dunncl66@..." <dunncl66@...>
> To: DynoMotion@yahoogroups.com
> Sent: Fri, May 7, 2010 9:20:59 AM
> Subject: Re: [DynoMotion] Re: Drive Info
>
> Â
> Tom,
> Say a fellow found a deal on some PWM versions. Would it work?
>
> Sorry to keep bugging you.
>
>
> Chris
>
>
> Sent from my BlackBerry® smartphone
> ________________________________
>
> From: Tom Kerekes <tk@dynomotion. com>
> Date: Fri, 7 May 2010 09:11:55 -0700 (PDT)
> To: <DynoMotion@yahoogro ups.com>
> Subject: Re: [DynoMotion] Re: Drive Info
> Â
> Hi Chris,
>
> +/-10 V analog to servo amps is probably the simplest way to go.
>
> TK
>
>
>
>
> ________________________________
> From: dunncl66 <dunncl66@yahoo. com>
> To: DynoMotion@yahoogro ups.com
> Sent: Fri, May 7, 2010 6:24:18 AM
> Subject: [DynoMotion] Re: Drive Info
>
> Â
> Thanks for the info. If I go this route, would suggest using a PWM signal or sticking with the +/- 10 VDC to drive the servo amps?
>
> Chris
>
> --- In DynoMotion@yahoogro ups.com, Tom Kerekes <tk@> wrote:
> >
> > Hi Chris,
> >
> > No Geckos are designed to close the loop themselves and just be told where to go via Step/Direction.ÃÂ You could go that route and use the KFLOP Step/Direction outputs, but the system would then be basically open loop from KFLOP's standpoint and you wouldn't really need Kanalog.
> >
> > I don't know of a specific source for Analog input Servo Drives.ÃÂ ÃÂ
> >
> > These are popular:
> >
> > http://www.a- m-c.com/download /datasheet/ 20a20.pdf
> >
> > Anyone know of a good source??
> >
> > Thanks
> > TKÃÂ
> >
> >
> >
> >
> >____________ _________ _________ __
> > From: dunncl66 <dunncl66@ .>
> > To: DynoMotion@yahoogro ups.com
> > Sent: Thu, May 6, 2010 5:49:51 AM
> > Subject: [DynoMotion] Drive Info
> >
> > ÃÂ
> > I have found one of my Getty's N360 servo drives to be bad. I now want to replace all of them with new drives. Do you have any recommendations on what drives work well with KFlop/KAnalog/ Mach3 for a 7 Hp 3 axis mill with 90v servos? If I use Geckos or Vipers, will they work if I leave the encoder feedback to the KAnalog and not directly to the drive?
> >
> > Thanks, Chris
> >
> |
|
| Group: DynoMotion |
Message: 369 |
From: Tom Kerekes |
Date: 5/7/2010 |
| Subject: Re: Drive Info |
Hi Chris,
Those look good except I see one problem. The KFLOP PWM outputs are 3.3V signals and this drive expects a 5V sinking output drives. Unlike the KFLOP Step/Dir outputs, the PWM outputs don't have the "open collector" mode that usually works well with 5V optos. It may work by just driving the optos with 3.3V instead of 5V, or you could add some external 3.3V to 5V converter. I found this, but it doesn't specify exactly the voltage levels to turn their opto on and off.
Thanks
TK
| Group: DynoMotion |
Message: 370 |
From: dunncl66@yahoo.com |
Date: 5/7/2010 |
| Subject: Re: Drive Info |
I have a call into the manufacturer asking about the 5V signal tolerance. I really appreciate your time helping me out. Chris Sent from my BlackBerry® smartphone
From: Tom Kerekes <tk@...>
Date: Fri, 7 May 2010 10:31:46 -0700 (PDT) To: <DynoMotion@yahoogroups.com> Subject: Re: [DynoMotion] Re: Drive Info
Hi Chris,
Those look good except I see one problem. The KFLOP PWM outputs are 3.3V signals and this drive expects a 5V sinking output drives. Unlike the KFLOP Step/Dir outputs, the PWM outputs don't have the "open collector" mode that usually works well with 5V optos. It may work by just driving the optos with 3.3V instead of 5V, or you could add some external 3.3V to 5V converter. I found this, but it doesn't specify exactly the voltage levels to turn their opto on and off.
Thanks
TK
| Group: DynoMotion |
Message: 371 |
From: babinda01 |
Date: 5/7/2010 |
| Subject: Re: Drive Info |
|
Hi Chris & Tom
I have been pondering this question in my spare time (I don't have enough of it at the moment). I was going to make up a very small board that takes the +-10V from the Kanalog, through an Instrument Amp like an AD620 or similar, then into a PIC to convert the signal to a PWM signal of any type your heart desires. The reson I would like to do it is because I made a small DC amp many moons ago, and I would like to be able to reuse the power section of this amp so that it can be used with the kanalog. I can't see why it wont work - Tom, any thoughts???
Regards
Andrew
|
|
| Group: DynoMotion |
Message: 372 |
From: Tom Kerekes |
Date: 5/8/2010 |
| Subject: Re: Drive Info |
Hi Andrew,
I can't see any reason why that wouldn't work. But why not use the KFlop PWMs? Although currently there are only 4.
Regards
TK
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