Quote Originally Posted by Philly View Post
This is a strange one, but Im not sure if its normal. If I apply a little pressure to the bottom of the Z axis and lift it up it will move a few mm. Is this normal, could it be the couplers?

Just wondering as my carvings are developing lines across them from where the Z axis isnt returning back to the same spot.
if you bought 1605 screws nuts and bearings from china you may need to add a spacer between the angular contact bearings (all of them) they are mounted as if they are matched pairs that only need pressing together however they are not matched and no matter how much you press them together they do not pinch.