RE: [CAD_CAM_EDM_DRO] Re: Yet another NEMA 42 roadblock

A CMD-260 is not a Gecko. The CMD has a lot of self protection and will
tolerate shorts and miss-connects on the motor connects. I have not
tried that personally, but the data sheets stated this and I have talked
to people that have accidentally shorted motor leads on them and they
say there was no ill effect other than the drive shutting itself down.

I am not recommending you try testing all the self protection, but know
that it is there if you really screw up.

Tim
[Denver, CO]
Sherline products at Deep Discount
Mach1 & DeskCNC with credit card ordering
www.KTMarketing.com/Sherline
Now selling Visual Mill

> -----Original Message-----
>
>
> <snip>
> >
> > Jeff,
> >
> > You won't likely hurt your motor if you connect the coils
> > incorrectly. I think your motor does not match the one you have
> > documents of. So go ahead and connect it in various ways. It will
> > just sit and hum, or buzz if you get it wrong. Keep trying, that's
> > one of the prices of "surplus" motors<G>
> >
> > Hope this helps,
> >
> > Ballendo
> >
> > P.S. I think Mariss has said that you CAN hurt a DRIVE, if you hook
> > up an 8 wire motor incorrectly!
> <snip>
>
>
> 2 things, first, I think these are existing froma 120volt or higher
> system so if they were run at 100 volts and 8 amps, or 800 watts,
> running them at 30 volts and 4 amps or 120 watts will show they are
> working, but not do heavy duty work.
>
> Second point is that you are correct that completely miswired ie:coil
> A into coil B on the drive will cause damage. That is why I said to
> use single coils and not mess with guessing how to use the 8 wire in
> series or parallel. besided probably half of us use only 2 coils to
> begin with and the 3% gain is not worth the worry to a newbie.
>
> Dave
>
>
>