Hi all,
I'm working on a project which requires that I be able to 'record' externally driven rotations of a driveshaft and then 'play' them back using a servo/stepper motor. It'd be nice if I could just use the encoder in the servo/stepper for recording, but I'm not sure about backdriving servos. Its also very important that during recording, the external driver experience as little friction as possible. This makes me think that I need some kind of clutch, but I haven't been able to find anything suitable despite my best googleing efforts.
Are there any off-the-shelf parts (i.e. servos with a clutch) that could be used to do this? If I were to use a sufficiently powerful motor such that it didnt need to be geared down at all (or very little) would it be okay to just backdrive it?
If its useful, the motions that I need to record will vary, but will likely not exceed oscillations of about 5 degrees at 15Hz. My torque requirements are likely to be modest, but I'd imagine than what typical RC servos can deliver.
thanks in advance, Graham