According to the stator winding, there are two-phase, three-phase and five-equal series. The most popular is the two-phase hybrid stepper motor, accounting for more than 97% of the market share, the reason is cost-effective, with a subdivision of the driver after a good effect. The basic step angle of this kind of motor is 1.8°/step, the step angle is reduced to 0.9° after being equipped with half step drive, and the step distance angle can be subdivided up to 256 times times (0.007°/micro Step) after the subdivision drive. Due to the friction and manufacturing accuracy, the actual control accuracy is slightly lower. The same stepper motor can be equipped with different subdivision of the driver to change the accuracy and effect.