RE: [CAD_CAM_EDM_DRO] 3 axis allegro 3977 stepper motor board

The 3977 chip is probably limited to motors up to around the 200 oz/in
range.


Peter Homann
mailto:Peter.Homann@...
Adacel Technologies Limited,
250 Bay St, BRIGHTON, 3186, AUSTRALIA
http://www.adacel.com <http://www.adacel.com>
Telephone +61 (3) 8530 7777, Facsimile +61 (3) 9596 2960
Mobile 0421-601 665

> -----Original Message-----
> From: Raymond Heckert [mailto:jnr@...]
> Sent: Friday, 12 December 2003 2:20 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] 3 axis allegro 3977 stepper motor board
>
>
> I'm interested! I need to design a one-axis stepper powered
> actuator. I'm
> planning on using about 300 to 500 oz-in stepper motors. Any help will be
> greatly appreciated.
>
> RayHex
>
> ----------
> > From: stokessd <stokes@...>
> > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > Subject: [CAD_CAM_EDM_DRO] 3 axis allegro 3977 stepper motor board
> > Date: Thursday, December 11, 2003 6:55 PM
> >
> > I've designed a simple 3 axis stepper motor driver board based
> around the
> allegro
> > 3977 microstepping controller chip. I'll be glad to share my design
> (although it's very
> > simple) with anyone interested.
> >
> > the 3977 is an interesting chip and the microstepping can
> improve motion,
> but my
> > experience with PWM motor controllers hasn't been great (I've used the
> newport
> > motion master 4000 for years in the lab). So I'm seriously considering
> designing a
> > half-stepping controller with current sources instead of ballast
> resistors (and FET pass
> > transistors).
> >
> > However this board has worked well for me on the bench, even though it
> sprays noise
> > all over the place. Here's a few pictures of it :
>
>
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