Re: [CAD_CAM_EDM_DRO] Steper motor wiring

Tom Hubin:

Thanks. I have no voltage or current rating info.

Robert

----- Original Message -----
From: "Tom Hubin" <thubin@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, December 30, 2004 9:06 AM
Subject: Re: [CAD_CAM_EDM_DRO] Steper motor wiring
>
> Robert Williams wrote:
> >
> > If I try to determine coil terminals by connecting 12v car battery
(negitive) to a stepper terminal and touching other stepper terminals with
the positive, WILL I HARM THE MOTOR?? If not what reaction should I look
for when coils are energized?? Motor shaft is connected to X axis... will
the axis move??
> >
> > RobL
>
> Hello Robert,
>
> 12vdc is too high for many windings. Damage is possible and likely.
>
> What is the listed voltage and current rating for the motor?
>
> Try a 1.5vdc D cell battery. Any stepper that can run a mill will handle
> that with ease. You should expect nothing to happen if the leads are not
> part of the same winding. You should expect the motor to move slightly
> then stop if the leads are part of the same winding. If you rotate by
> hand, the shaft will settle into only certain positions for each pair of
> connected leads.
>
> You should be able to connect lead pairs in an order that rotates the
> shaft one step at a time.
>
> An ohmmeter is better for testing. That way you not only know which
> leads are part of the same winding but you also know the resistance and
> which, if any, is a center tap.
>
> Tom Hubin
> thubin@...