Re: A3977 Microstepping Driver PCB Update

--- In CAD_CAM_EDM_DRO@y..., "ths992001" <tom@t...> wrote:

> Folks,
>
> Well, I'm just about ready to order my first small batch of printed
> circuit boards for Allegro's new A3977 chip, but I'd like some
> feedback from you folks. (almost) current info is posted on my
> website at:
>
> http://www.thsengineering.com/projects/a3977proto/a3977proto.html
>
> This is not intended as a ready to go commercial product, but

rather

> as prototyping tool for all those free samples we ordered months
> ago.
>
> Thanks,
> Tom Scarince
>
> P.S. Blatant plug - That lot of large timing belt pulleys I have on
> eBay still has no bids and the auction ends early tomorrow. Come

on,

> the QD bushings alone are worth more than the $35 starting bid...
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1763307685

The boards could be handy as I did order some samples of the 3977 in
the PLCC form factor. I would prefer the current limit have provision
for a trimmer to adjust current limit or a header etc.. any method to
easily tweak the current set.

Any idea of target price?

The pulleys well they are steel so a bit heavy for servo work.

Brian
BSP