Problem
Excessive play in the Z-axis. This solution applies to SOL machine models.
Solution
his can be fixed. However it will take some disassembly. It looks like the nut that holds the lead screw against the bearing is loose. In order to tighten it access the back of the Z stage. There are a number of ways to do this. Once viewing the back of the z-stage and screw:
(1) remove the lower z mount (see images), (2) then the gear, and (3) then use a deep socket to tighten the nut while holding the lead screw still. Then reassemble.
