I have the TB6560 driver board 4 axis : and my prob is, z axis runs backwards and X axis just locks up when prog run and Y seems to be good. all steppers seems to hummmm pretty load after you jog them ,it you bump the jog again the stepper will go quiet.. Can any 1 help have any ideas. O and i switched X and Y , then Y locked up, and X worked so the wiring is right as far as i know , I haveby alscorp - Mechanics