My goal for the gearing project was to understand and create a planetary relationship between gears. I was inspired by the elegant and well crafted models of Remeaux. They don’t seem to be to any purpose beyond exposing the relationships in different gearing mechanisms.
Materials
- 1/4″ plywood
- 3/8″ hardware: carriage bolts, nuts, washers, lock washers.
Design
I used the Rhino plug-in ‘Geargen’ to create the profiles of my desired planetary geraing. I experimented with different ratios and gearings and eventually realized that using gear diameters in 1:2 or 2:1 relationships worked best. Therefor, my design from the center out is in the ratio 2:1:4. I also created a stand so that it is self supporting as a demonstration piece.
Procedure
I started out with a 2D drawing and lasercut this out of 1/4″ plywood.
Here’s the cutsheet
Assembled on the center bolt, you can see clearly how the planetary gear will work.
Once I stood it up, some new parts were required due to the balance of the thing.
Finally, the drawings I used to create the gear-machine and the layout used for the lasercutter