Brett -- the controller, which I have been calling a drive box, is hooked up to the pc with a printer cable through the printer port. It was going from the pc to an opto BOB, then to the controller, but I bypassed the BOB.
Rich -- If I can get someone over here I will show them your instructions.
Hood -- Yes, when I switched the pins from the x to the y, the problem switched from the x to the y, and visa versa. I concluded therefore that I could eliminate the motors and the PC as the problems, and was left with the BOB and controller. When I bypassed the BOB that left the controller as the major suspect, although I guess the pc or software could somehow be corrupted. Is there a way to check that?
Bob