View Full Version : Planetary gears?

02-08-2011, 12:11 AM
Am I going to have to descend into Boolean Hell to create planetary gears, or has someone already written a script?

Anybody got advice as to how to calculate the teeth size that will work for the ring gears and planetary gears??

02-08-2011, 01:01 AM
Use the gear primitive and count; if a gear has 10 teeth and the one rolling off it has five, it will rotate in the opposite direction twice as fast.

Teeth size is the same though relative to the radius offset changes... but you can knock up one of those really quickly all you need to know are the ratios then use channel follow @- 100 for opposing gears.

02-09-2011, 01:26 AM
Thanks mp, but there's gotta be a couple other parameters in there: some radius stuff, since 5 teeth could be so scattered around the perimeter the gear wouldn't actually work.

I was hoping for Modeler scripts, not motion expressions, got that covered.

Eventually, I just basically eyeballed it. The existing gear scripts are merely OK: simple better labeling would improve them.

Next up: right angle gearsets, then worm drives!!! Exciting!