Re: Lost steps

Hi, Another "strange but true" possibiliy is a ratcheting action of
the motor coupling. I have seen this a few times.

I would guess you have a fair amount of vibration at low speeds
because you are using a full step drive. Sometimes this can loosen
set-srews on the coupling and result in ratcheting in one direction.

To check for this draw a mark from the motor shaft to the coupling
with a fine felt-tip pen. Let it run for a while and then see if the
marks still line up.

Mariss

--- In CAD_CAM_EDM_DRO@egroups.com, Ozzie@h... wrote:
> Hi Mariss, Thanks for the noise info.
> In my case the signal wires are not close to the motor wires except
> maybe within the case, and there they are not bundles together. I'm
> also pretty sure the problem is lost steps and not added steps. The
> external motor wires are shielded but I don't think the shield is
> grounded. Maybe I should do that on general good practise grounds.
>
>
> I need more time to test out all the info I've been given here.
> I suspect I'll find its the acceleration problem