After doing three cuts with my shapeoko, I looked behind the Z axis and noticed that there is a block with a thread running through it that is bolted to the z axis and has the lead screw running through it. I noticed on mine, that the block was not even bolted on at all. This part came pre assembled if I’m not mistaken? I have no idea how it came loose or if it showed up that way? I’ve only done 3 small jobs so far…
Here is a picture
It was basically free to wobble around in there.
I took it apart and screwed it back in place.