Belt synchronized Z axis single stepper mod for geeetech i3 ProB

thingiverse

This is a drive kit for the Z axis of Pro B. It converts the Z axis into a single stepper motor system. Update: The kit has been updated to include a spool holder and filament guide. Please consult the picture provided to assemble the parts correctly. Note that the lower bearing was found to be slightly loose, so aluminum tape was applied to hold it in place. To complete the conversion, replace the lead screw with one that is 350mm long. It's recommended to use a single-start lead screw with a 2mm pitch instead of the standard 4-start lead screw with an 8mm pitch. A note about bracing: Use an M8 threaded rod as a brace for the assembly. This rod can be left in place after upgrading to new lead screws. Additional parts required: * A 2GT cogged belt, approximately 782-800mm long * Four 694zz bearings * Two M4x30 bolts * One M4x15 bolt * Two M4 locknuts * One M4 nut * Six M4 washers * Two Φ8 locking rings * Four 608zz bearings * Eight M3x16mm bolts (if you choose to drill lower supports instead of tapping them) * A set of printed cogged pulleys (requires an M4 tap) * Six M4 set screws * Or, if you prefer to use a different type of brace: + Eight M8 nuts + Eight M8 small washers