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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