Consider the following gearbox:
-A 775 pro, in a Versaplanetary with a 9:1 stage, with a 40 tooth gear on the output shaft
-A second 775 pro, in a Versaplanetary with a 3:1 stage, with a 40 tooth gear on the output shaft
-A third 40 tooth gear, linking together the output of both planetary gearboxes, with a final output shaft in it.
Some interesting questions:
- What would be the output free speed? My guess is about 1/6th the free speed of 775 pro
- What would be the stall torque? My guess is 12 times that of a single 775 pro.
- For a given load - say, for example, lifting an object from a spool on the output shaft - what would the current draws be on each motor. My guess is that the second motor would draw three times as much current as the first, but I could be easily convinced that they would be equal.
Wise folks of ChiefDelphi, what do you think?