Raleigh, NC
Quoted from Sheprd:Glad to help you out.
Mac
Hope you can continue with the excellent info. I found a schematic for the stepper board. My spider motor is locked on...won't turn by hand with power applied. Checking the A, A_, B and B_ channels, the voltages stay solid at 9V, 0V, 0V and 9V. Back tracking, Pins 4 and 5 of P1 don't change either when running the spider test. One is always 12V, the other, 0V. So it would appear that the problem is not on the stepper board but further back. Any idea what drives P1-4 and P1-5 (Input A and Input B)? Is that from the schematic you posted above? Does J110-4 and J110-5 feed P1-4 and P1-5 on the stepper board?
