I’ve been experimenting with your DRV-8825 carriers and they works great! I have a box of assorted surplus stepper motors that I have not been able to identify other than that they are bi-polar. They range from very small CD tray motors to medium size laser printer motors. I’ve been able to get them all working using the DRV-8825. I have 2 questions regarding voltage and current.
- I’ve tried voltage settings between 10V and 24V and it does not seem to make a difference. Since the driver is constant current, I assume it steps down the voltage as necessary. Therefore, does it matter what voltage you choose?
- For current, I’ve been starting low and then increasing it until I get too much heat or any noise while idle. For heat I’ve been using the 5 second rule (I can comfortably touch the stepper and the DRV8925 for 5 seconds.) Does this sound like a prudent approach? Are there more scientific methods?