Re: [CAD_CAM_EDM_DRO] Hurco KM-3 retrofit

On 5/18/2012 11:51 PM, Jon Elson wrote:

>
> Ron Thompson wrote:
> > Thanks, Jon.
> > The servo drives are bare boards inside the cabinet. There is a label
> > that says Servomate and 90 VDC.
> > The problem is which pins to use?
> >
> OK, I don't know this model, but a quick check turned up some info :
> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Servomate
> A good bit of info is in the document linked there.
>
> Seeing as these units may be as much as 30 years old, and use either a 5
> KHz or 2 KHz
> switching frequency, you may want to re-think using them. I see
> something that
> suggests this might be a sign-magnitude scheme, so maybe it doesn't
> "sing" to badly
> when idle. I know some of the early PWM drives produce a maddening whine.
>
> Jon
>

Thanks again, Jon.
I had found this, but not much else. The PDF seems to be the correct
info for the drives. I'll know more on the next visit.

--


Ron Thompson
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