Re: [CAD_CAM_EDM_DRO] Re: Re: Gekkos

I'm getting +5 from a axxus parallel port card that has a separate 12
volt supply input to run relays.The power cap is huge. it never did this
until I changed the motherboard and it goes away if i disconnect the
parallel port cable from the card.

Ray Henry wrote:

>
> 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
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this as a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
>
> Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
> Moderator: jmelson@... timg@... [Moderator]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> bill,
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/