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