I have some of the DRV8825 motor controller boards (2133), as well as the micro metal step motors (3073 and others) with encoders (3081) mounted on them. I want to use the gearbox / motor / encoder as a high resolution input for a DIY Follow Focus. (Essentially, a human will be turning the motor by hand, and I will be counting the encoder ticks for adjusting focus position.)
It would be ideal if the motor (which is now acting like a generator) can be attached to a motor controller, so that the focus wheel can provide either a ‘force feedback’ or otherwise be animated (for instance A to B transitions).
Are there any caveats or design tenets that need to be followed when putting together a hand turned motor connected to a motor controller? Anything further that needs to be followed if the system is being powered by a lipo battery?
Thanks in advance!