M180 use 5 stepper motors. The electric parameter is shown below:

^Model       ^Step Angle  ^Phase Current  ^Phase Resistance  ^Phase Inductance  ^Holding Torque  ^Detent Torque  ^Rotor Inertia  ^
|NEMA17-34mm |1.8°        |0.4A           |24 Ohm            |15 mH             |1.6 Kg.cm       |120 g.cm       |34 g.cm    |