I'm back with several other problems, as usual. I have replaced the motor with a Lin Engineering 5718M-02E-03. It's wires are: A blue/white, C red/white, A(with a line over it) blue, C(with a line over it)red, B green/white, D black/white, B(with a line over it) green, D(with a line over it) black. I'm assuming that the letters with the lines over them are the small letters; is that correct? The Cs are obviously the common and am I correct in assuming the Ds are also common? But here is the big problem: I wired this A axis into the controller, jogged the other 3 axis, which worked fine , tried the A axis, the dro functioned but the motor didn't turn. But then I tried the other 3 axis again and they didn't work, either, yet the dros function. Not certain where to go from here. In a thread called " mystery motor loss", Hood suggests that working dros and non working motors may be the result of a parallel port out. How do I diagnose that? Thanks, Pico