Z-Axis Stepper Motor Planetary Gear Upgradehttps://imgur.com/a/36FbEsQ
What this mod does:
The Z-axis stepper motor works at 1.8° steps.
The Z-lead screw is quad threaded and every revolution raises the X gantry 8mm.
200 steps in a full circle. 0.04mm per full step.
The sun and planet gears have 12 teeth, and the ring gear has 36 teeth.
With a fixed ring, this planetary gear ratio is 4:1, i.e., the sun gear turns four times for every revolution of the carrier.
With this upgrade, a full step is now 0.01mm.
Files:https://www.thingiverse.com/thing:4149689
Buildplate arrangement:https://i.imgur.com/pZ9cevi.jpg
To minimize backlash, there is very little gear clearance, 0.04mm.https://i.imgur.com/Buexshp.jpg
I was able to print the model as is with a 0.2mm nozzle and 0.12mm layer height. If you have any trouble, play with the Horizontal Expansion setting in Cura.
There is more clearance, 0.06mm, between the carrier axis and the planet gears to prevent binding and breaking. They should move freely.
Test fit the…