Control box rebuild

[JohnHaine]

When I had this problem (except with the Z axis) it turned out that the "direction" wire had come out of the drive. The drive thought that the direction was always the same polarity (whichever it pulls to) so the step pulses always made it go the same way. It happened just after I had done some mods to the unit that involved disturbing the wiring. Poked the wire in the term block, did the screw up properly, problem solved. The same thing would happen if the connection had come off at the BoB end of the link, or on the BoB itself. Trace it through before you buy a new BoB.