1:6 gearset for use with NEMA-17 RDD step-up gearbox

thingiverse

**Do not use in its current form!** In converting from the 1:4 gears, I left some of the herringbone twist math wrong that assumed sun and planets had same number of teeth/diameter. This produced gears that do not mate correctly and that will run very rough and likely break. I will publish a fixed version and an improved design at some point. For use with https://www.thingiverse.com/thing:4848302 to get 1:6 instead of 1:4 step-up. This is experimental, as the sun gear (and its coupling to the output shaft) is very small and could use better reinforcement. I had several sun gears fail printed in PETG (broken teeth), but no problems since switching to PLA. At some point I will probably publish a revised sun gear that's more reliable. Motivation is getting higher max speed for retraction and pressure advance. See the original gearbox page for instructions on printing and assembly.