Re: Re: Gekkos

Gene

I'm with Jon on this E-Stop thing. Either the US or the EU way of wiring it
will give you a real machine stop when something powers down when it is not
supposed to.

However, I am mystified by the fact that something has to be putting out
significant steps in order for the 201 to move to the next position.
Steppers and their amps are not like servos where some creep might be
expected in the absence of control signal. This would be a good time for a
scope reading on screw 9.

The only thing that I can think is that you must have large noise spikes
getting in there. Where are you getting your +5 for the 201? I think that
I'd try a larger cap on the power supply. Then I'd separate the wiring for
step, direction, and their common from the power and motor wiring. Shielding
those signal wires from everything else might also help a lot. Remember to
ground that signal shield at only one end.

Ray

>    From: Jon Elson <elson@...>
> Subject: Re: Gekkos
>
> Gene wrote:
> > I just changed my motherboard and everything works fine with BDI and
> > Gecko 201. But when I turn the power off to the computer one axis creeps
> > slowly With no way to stop it except turn the power off. is this normal?
>
> You obviously don't have your e-stop circuits hooked up.  You should have
> something that disables the Gecko drives when the computer is powered down.
>
> Jon