Ive built a cnc machine and had it fully working. Recently though, the x-axis stopped working.

Im running windows xp, mach 3 software, smoothstepper, gecko g540, cncrouterparts.com's nema 23s and hardware.

Anyway, like i said, the cnc was fully operating up until recently. The X-axis does not move. I have the A-axis slaved to the X-axis. When I go into mach 3 to jog the motors and click on 'jog x axis', only the A side will move.

I thought it might be a bad motor, but i switched the serial cables on the g540, and tried to run it from the Y-axis output and the X-axis motor works just fine. So doesn't look like a bad motor or serial cable.

Then I thought the problem might be with the g540. I sent it back to gecko drive and they found no problems with it.

This makes me think the problem might lie in mach 3 or with the smoothstepper. Any help or possible solutions are appreciated.