CTC i3 Z Wobble

thingiverse

After testing various solutions to eliminate the wobble from my Geetech Prusia i3's Z axis without total satisfaction, I designed this piece. It allows for complete decoupling of the XY movements of the Z-axis screw relative to the X-axis carriage. An axial ball thrust bearing is used to support this carriage with minimal friction. The top disk of this bearing is mounted with its flat face down (in contact with the balls so as to have no friction and a degree of freedom in XY). The central hole is enlarged to 9mm, ensuring it never rubs on the Z-axis screw. As a result, the X carriage is positioned on two discs floating on balls, providing freedom in XY and eliminating any rubbing issues. V2: An additional piece has been added to hold the top plate of the bearing in place relative to the X carriage. The bearing used is of type F8-16M. Pictures show the printing before modification, subsequent modifications, and the current result on the right.