I'm currently making something similar but using a BKA30D-R5 (a dual stepper motor used in car dashboards) and a hall sensor to zero the hands.
I'm currently making something similar but using a BKA30D-R5 (a dual stepper motor used in car dashboards) and a hall sensor to zero the hands.
Yes, this project screams for some kind of sensor to detect when the hands reach some known position.
Yeah, it's super quick to start with a MK I eyeball to set them, but having a sensor just avoids any drift. I got away with using one by taking a reading and moving the other hand to check they weren't on top of each other already, and then doing a full rotation between readings.