Re: shielding for steppers

Hi,

You have great replies but one thing to add: be sure to ground the
shield at one end only. A "shield" grounded at both ends creates
ground loops.

Chopper drives are horrible EMI noise generators and can definitely
cause problems with nearby instrumentation. I once had to treat the
load as a pseudo-ballistic object and turn off the drives during a
video frame-grab, simply because I couldn't keep the EMI bottled up
with shielding.

Fred R.

--- In CAD_CAM_EDM_DRO@y..., cncnut@s... wrote:
> Hi all,
>
> Been struggling with a little problem and hoping to get some
insight
> from the group.
>
> It seem to me that only servos with encoder need shielding for the
> cable to the motors. But do steppers need shielding. It appear to
be
> unnecessary?
>
> Thanks
>
> Peter