Hello,
I recently assembled some linear actuators from OpenBuilds, which come with NEMA 17 stepper motors. I did this to start learning how everything works (I'm completely new to this).
My basic question is this: The motor specs say it can operate on 12-24VDC with a peak current of 1.8A. The problem is, I measured the resistance of the stepper motor coils (per phase) and it measured 2.5 ohms.
Now, based on basic electrical knowledge, if I apply 12 volts to the motor and the coil resistance is 2.5 ohms, I'll end up with a current of 4.5 amps. This far exceeds the permitted peak current of 1.8 amps. If the voltage were 24 volts, the current would double, which would only make the situation worse.
So how is this supposed to work? The motor can't handle such a high voltage, and the resulting current would burn it out. So how should the motor's rated voltage be set?

Thank you.