Ok, It's done. But it doesn't spin. I did for a brief moment after a lot of re-wiring attempts (and helping it along by hand). Now it just wobbles again. I also get around 6v on Q1 and around 11v on Q2,3,4.
When on 3600 mode, full power (111) it does 4 steps (as far as I can "feel" under my fingers) to one side then 4 to the other. The time it spun the stepper it was on 200 mode i.e. full step, full power (100). I am still on the default 1ohm set-up. I have also incorporated the two 470ohm resistors found on the assembly page between +5v and r14/15 and r16/17 respectively. Everything is basically as per web page.
I'll experiment some more and report on progress.
P.S. just to get this straight (transistor->coil) Q1->A+ Q2->A- Q3->B+ Q4->B-, right?
P.P.S. my steppers are 1.2A step-syn items (blue label) |