I'm trying to aggregate information on config settings and current limit calculations for all the popular "StepStick" style motor drivers. However, I've noticed that while the older type (A4988 & DRV8825) just have a
Vref = I / 2 style calculation, the new Trinamic TMC2xxx line of drivers all have calculations for both RMS and Peak current.
So, this leaves me with two main questions:
- If my stepper motor data sheet says "Rated Current: 1.4A", do I need to calculate for the TMC drivers the Vref for RMS or Peak?
- For the older drivers (A4988 & DRV8825) is it limiting the RMS or Peak current?