Hi Chaps,

I have a problem with my Z axis. I was doing a pocket to a depth of 0.8mm using a wire brush to put a texture on an ali sheet and clear odd a few burrs. It worked superbly until it came to do the outer 'finishing' run of the pocket, when the Z just drove down hard into the work. After recovering from that Oh Sh*t!!!! moment I tried to jog the axis upward, but no go, just some buzzy buzzy from the stepper.

I took the stepper off and wound out the screw (trapezoidal - MD machine) cleaned it all up checked all moved freely and re-assembled. Now it will jog up and down or just buzz at random. Jog direction is random.

Does this sound like a fried driver ?

Tomorrow, when I have cooled down a bit, I will swap over the drivers in the control box and see if the problem moves around with the driver.

Any thoughts anyone ??

Rob