I’m using tiny Chinese motors, with torque control=voltage and motion control=velocity. My setup works very well.
I recently purchased two additional motors, supposedly of the same model, although from a different reseller. The don’t work correctly.
First I can feel some very light scratching when turning them by hand. The original ones don’t have that. Second, they are more noisy, the motion is jerky, and the PP check sometimes fails. One of them have a strange behavior: it works almost perfectly in one direction, but very badly in the other.
I use the same encoder as before. I checked the polarities of the magnets: they seem fine (diametrically polarized).
Any idea or comment?
Thanks