[medved]

Hi

I have one question. Does harmonic drive gearbox keep its position under heavy load when the motor that powers it is shut down - the way like worm gearbox keeps its position?


Just a thought: if it does keep position when motor is shut down, how did they then geared lunar rover(lunar automobile); how did they prevent gears from breaking when electromotors were spining too slow for actual speed of the vehicle?

[Evodyne]

Medved,

Hi. I bought a couple and am playing around with one now as I write to you. Mine are 120:1 reduction. If I grasp the "output" and try to torque it, I can get it to backdrive and spin the "input" at a real fast rate. So really no different than a 120:1 reduction belt drive. There is a maximum torque figure for these-just like anything else. At some point if too much torque is applied I'd guess the first thing to go would be the teeth on the drive gear or the flex gear at their common contact point.

Evodyne