Maybe someone can help. I'm going crazy here.
When I auto home before a print , z axis goes home then goes up a mm or 2 and grinds , when this happens I lose my calibration and it either slams into the bed or sky rockets 2 inches above the bed. The driver pots are at 1.09 according to my DMM. Endstop is on the left and plugged into zmin. The board is an MKS v1.4. I've updated the configuration.h file. Uploaded newest firmware. Lower / raised my z axis feed speed rate. I've even added z offsets and negative offsets. I'm at a complete lose. Printer is only 1 week old.
Any help would be greatly appreciated.

Edited 1 time(s). Last edit at 06/25/2016 01:28AM by Taw1985.

I meant z axis. Sorry.

Edited 1 time(s). Last edit at 06/25/2016 01:27AM by Taw1985.

Did you install the jumpers under each of the step motors? This one drove me nuts on my Xi3 (nothing in the images/documents about it).

...b

Edited 1 time(s). Last edit at 06/27/2016 04:51PM by Bishop.