Summary

Second part of the project. (part 1: https://www.thingiverse.com/thing:3209976)
This time Right arm (pillar or whatever you want it to call).
Y-axis slider (bottom - slightly different than the other from part 1).
Motor Case - designed to be used with DVD stepper motor taken off the drive, removed axle holder completely to put axle trough the ball bearings nested in case.
The motor case is designed to fit on 15mm diameter motor with the 3mm axle. Some motors have 3.5 then obviously all the bearings need to be replaced with outside diameter 8mm and internal diameter 3.5 mm and thickness around 4mm in case you have no correct bearings case must be re-designed but the way it drive the belt should stay the same.