Bevel gears: two's company

A project log for Minamil: a minimal CNC mill. And friends.

Each axis: $̶5̶$8 motor+lead screw, 3x LM6UU, 3x 6mm x 100mm rod, 1/8in hardboard, PC case screws

Paul McClayPaul McClay 11/09/2020 at 07:330 Comments

In the last episode, a little bevel gear looked like nifty output, but it was too late at night to make more with a noisy dremeloid, and what's one bevel gear?

Another day, another gear:

Bevel Gears
little milled bevel gears

More of that with fun zippy sounds and a bit of the milling:

The gears started as an experiment to see if I could tweak a plain gear from fma/Fred's Bevel Gear featurescript in Onshape into something suitable for milling from ~3mm material with a relatively "large" 0.5 mm cutter. CAM by Stewart Allen's current development version of his "Free 3D Slicer and GCode generator": Kiri:Moto. (the CAM took some massaging - maybe more about that later - but with Stewart's current pace of work the details prolly will differ next week)

Zippy speed sounds aside, I'm happily surprised that when I put some drag one one gear and roll the other, they mesh quite smoothly under load. They're supposed to, but it was a pretty uncertain experiment to see if the modeling and milling on this scale would actually turn out a decent result. Yay.