Hello everyone. I recently had a vwheel break on my zcarriage. After replacing the vwheel, my z zero doesnt seem to hold. My spoilboard is level and the machine is square. However, the measured zero will not hold as the machine moves from the front of the spoil board to the rear. For example at the front of the quarter inch work piece shapes will be cut out to a depth of .25 inches, but shapes at the back will be traced above the work piece (the machine thinks it is -.25 inch in the Z, but is hovering an inch above the work piece. This problem happens in reverse if I start from the back and work to the front. (the back pieces are perfectly cut out, the front pieces aren’t cut).
I have tried tightening belts, v wheels, and the set pulley screw. I have also reconfigured the GRBL.
Any suggestions what i should try next?