I wonder if you have seem this before and can help me?
I damaged my MB2 BOB and I bought a replacement MB3, from CNCRoom in Thailand.

The X and Y axis are working fine, but I can't get the Z axis to work. I plugged the Z axis stepper driver into the Y axis output from the MB3 and that part was ok.

When I try to jog from the Keyboard OR my MPG, the values in the DRO change ok, but I do not get the expected output leds lighting up as I do with X and Y axis's.
I get ONE led lighting in one direction, but nothing in the other direction.

I assume because the DRO is changing that there is not a problem with my ESS?
It seems that the MB3 is not outputting correctly on the Z axis.
Have you seem this before?
Any idea how I can test to prove?


I have asked the supplier the same questions and am waitng for a answer. ( I hope )
Steve