I have had my machine for a while and have never got off a cut that was good, some that were passable.
I finally had time to pull it apart and have found that there is a lot of vertical movement in the z assembly. How is the acme screw supposed to be secured between the bearings? I pulled it apart and the screw has a lot of play in the delrin nut, is this correct or is there just supposed to be enough clearance so it can screw.
I have followed the online diagrams but when assembled there is about a 1mm of vertical play that the screw can move.