RE: [CAD_CAM_EDM_DRO] ringing steppers

This was posted as a reply. Where's the reply text?? I get these all the
time. Is it just me?

Carlos Guillermo
VERVE Engineering & Design

> -----Original Message-----
> From: Greg's Clock Shop [mailto:gregmc@...]
> Sent: Monday, June 05, 2000 9:22 AM
> To: CAD_CAM_EDM_DRO@egroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] ringing steppers
>
>
>
> ----- Original Message -----
> From: Jon Elson <jmelson@...>
> To: <CAD_CAM_EDM_DRO@egroups.com>
> Sent: Sunday, June 04, 2000 1:41 AM
> Subject: Re: [CAD_CAM_EDM_DRO] ringing steppers
>
>
> >
> >
> > Carl Bruce wrote:
> >
> > > My steppers "ring" when at rest. i am using a single supply for 3
> > > drivers. IF I disconnect two drivers the noise stops.
> > > Or ,if i use separate supplies it stops.
> > > Any suggestions?
> >
> > I assume these are 'chopper' type stepper drives? Probably some
> > circulating
> > current from the choppers pulsing. I would try putting something like a
> >
> > 100 uF capacitor with enough voltage rating for the DC supply across the
> >
> > input terminals of each stepper driver (from +DC supply to DC supply
> > Gnd).
> > This should absorb most of the current pulses, and prevent the drivers
> > from 'communicating' on the power lines.
> >
> > Jon
> >
> >
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