RE: [CAD_CAM_EDM_DRO] Re: Eureka!

I originally had the short wire from the connector the printer cable plugged
into to the header pins on the PCB unshielded. When I started turning up the
amperage I began getting strange twitching and occasional steps on the Z
axis. To make a long story short, the problem was that the Z axis was the
furthest from the connector and the wire was picking up interference from
passing over the board on the way to the header. I put in a shield around
the wires and the problem went away.

So, I would suggest using shielded wire as it took me months to get it
tracked down and figured out.

Tim
[Denver, CO]

> One more question, is it necessary to shield the
> short lengths of wire carrying the step and direction signals from
> the
> the female connector to the board?
> Thanks again, Terry