The basic step angle is the rotation angle per one step. The 2-phase step angle is 1.8°, which means the resolution of the motor is 200 steps per revolution. The 3-phase step angle is 1.2°, which means the resolution of the motor is 300 steps per revolution. The 5-phase step angle is 0.72°, which means the resolution of the motor is 500 steps per revolution.