Re: [CAD_CAM_EDM_DRO] Re: Lost steps

ptengin@... wrote:

>
> I had similar problems on mine. I installed decoupling caps and went
> to
> twisted pairs of 20 or 22 ga wire for the signal, no shield. The
> problem went
> away!! I don't recall the value of the decoupling caps but they must
> be small
> as larger caps did manage to dampen the pulse when observed on a
> scope.
> Perhaps Jon would have the value off the top of his head. I'd have to
> drive
> out to my dad's place to look/see. Good luck

OK, what Peter is talking about here is putting small value capacitors
across the signal inputs (one from signal ground to step in, and one
from signal ground to direction in) right at the stepper driver
terminals.
I would recommend 100 pF (Pico Farads) as a start. This will remove
extremely short duration noise pulses that are picked up by the wiring.

Jon