THanks, all for you advice. I think the best way to get a small ring gear is to buy one.
What I'm doing is a design-study to find out the best kind of reduction system. Timing belts are very easy to use but sun/planet gears are far more compact. I want to make a machine, using machine-tool terminology it will be a 12 axis system where every axis is rotary. Using robotic terminology it will be a quadruped where each leg has 3 degrees of freedom. My goal is to design something that can be made for under $100 per axis ($1,200 total cost) This is actually possible but performance is poor. I want both the < $100 cost and excellent performance. I think it can be done by using motors from quadcopter drones and then using a reduction drive of 6 or 8 to 1. Harmonic and cycloidic reduction drives are to slow 6:1 or 10:1 should work. The only way to know which design is best is to do multiple designs and test simple prototypes. One of the options is gears. _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
