Anycubic Kobra Neo Lead Screw Stabilizer

thingiverse

update 2023_11_20: bearing size is Outer diameter 16mm, bore 8mm, thickness/width: 5mm update 2023_08_22: removed from "work in progress"! update 2023_10_09: added spacers to be used only with dual-z-axis applications. This spacer should slide tightly onto the lead screw and make contact with the bottom side of the ball bearing. directly below the spacer is another pulley / collar to keep the lead screw from moving up and down The use of a lead screw stabilizer is somewhat controversial because it can place stress on the z motion of the gantry if the parts are not aligned correctly. However, a lead screw stabilizer seems to be necessary if you want to implement a dual z-axis upgrade using a belt drive. Originally I went down the route of trying out a dual stepper to control both lead screws. But having to constantly re-align them was a headache. Having a belt drive the two is a great way to set it and forget it. This design allows the lead screw to be off by a little bit and then you can tighten it down. Make sure you bring the gantry to the top before you tighten down the screws that secure the ball bearing position. Also, this design clamps onto the 2040 aluminum extrusions without needing one across the top like the Creality Enders do. Required parts: 1. 16mm x 8mm bore ball bearings (qty 2) 2. M4 x 10mm screws (qty 4) 3. M4 x 20mm screws (qty 4) 4. M4 nuts (qty 8) Currently "work in progress" and will be removed once it's mounted!