FRC1989 Compound Planetary Prototype about 30something to 1 target

grabcad

A compound planetary system requires a CIM motor on input and a 1/2in hexshaft on output, with a target ratio of 30something to 1 for the planets. The bearings needed are 8x16x4 or 8x16x5, available from Hobby King. Use 5/16 or M8 bolts as axles for the planets and Locknuts to secure them in place. This is a prototype currently undergoing testing and development. Print gears (sun, planets, rings) in a hard material such as Nylin. Taulman 910 or Hobby King CX12 are suitable options, or use fiber-reinforced materials for added strength. Print the holders out of a non-flexible material like ABS or HIPS to ensure rigidity. The thin rings are designed to be forced over the planets during assembly, and may deform slightly in the process. Solid ring holders will prevent flexing after assembly is complete. When printing with a .8 nozzle, use 8 perimeters; with a .4 nozzle, use 16. Maintain layer height between 25 and 50 percent of nozzle diameter.