I have a project that requires really accurate torque measurement of a motor or a motor + a belt drive. How do I do that?
I am guessing that measuring current through a stepper motor is is proportional to the torque? How about when there is a belt drive attached? There is some resistance in the belt and the output torque drops.
I accurate I can go? Is it possible to get into micro Newton meter (uNm) region. Assuming that I have a quality stepper motor, quality parts and I know what I am doing (well, I know a guy...).
An example of parts would be nice or commercial products or something to kickstart the project. This is related to this question:
but with accurate torque measurement.
P.S. other drives than belt drives could work also. I have no experience on harmonic drives so I don't know if they are good or bad for this project.