Originally Posted by sp1nm0nkey  I wasn't planning on doing micro stepping, but if I did I figured maybe I'd just check the current when one coil is full on (100% duty cycle), and then chop the supply voltage at high frequency based on the sensed current to get it within the motor's range. |
Sounds good, you'd probably get nigh on 2/3 the top speed of a Gecko and you'd have complete control of the coils from your software.
I went the commercial driver route when I had a mains voltage surge and all 3 axes failed the smoke test simultaneously
If I was determined to do it myself again I might rummage that ghastly auction site for some of these...
http://www.national.com/mpf/LM/LMD18245.html 