[CAD_CAM_EDM_DRO] Re: need components for stepper drivers

At 6:26 PM +0100 09-29-02, Tony Jeffree wrote:

>The Allegro 3977 does up to 8 microsteps & up to 2.5A at 35V. There's a
>3-axis board available from http://www.xylotex.com/
>
>What is the application you have in mind?

Thanks Tony. The 3977 looks good. Jeff Demand said they were a little
fussy about supply voltage, and that unplugging a powered motor was
most likely to be fatal (to the controller). Have you had any such
trouble? Also, I'm a little concerned about limited availability
(Newark only).

I'm the fellow who designed the Sherline CNC controller
(see http://www.bmumford.com/cncindex.html)
I'm thinking about a more versatile CNC package for sale to Sherline
customers. So I need something fairly robust that can be reproduced
with readily available parts. I used the unipolar Allegro 7044 in the
existing controllers, but am considering a bipolar driver this time.
The Xylotex product isn't too expensive, and I'm not opposed to
buying a solution instead of reinventing the wheel.

--

Bryan Mumford
Santa Barbara, California
http://www.bmumford.com