Hello,
I use the DRV8825 stepper motor driver carrier in connection with a bipolar stepper motor (Nema 17, 12 V, 0.33 A, 46 mH inductance, 34 ohm coil resistance) on a 13.8 V power supply and drive it with an MBED. I have no problem to drive this stepper motor.
But when I connect a higher torque stepper motor (Nema 17, 12 -24 V, 1.68 A, 2.8 mH inductance, 1.65 ohm coil resistance), the motor only does a short, single movement and the DRV8825 gets very hot immediately. I have checked the connections and as I can connect the first motor correctly I think that I have also connected the second stepper correctly.
Does anyone know the reason for this? Are the coil resistance and inductance of the second stepper motor to low for the driver?
Greetings
Klaus