Cheap printers have a variety of motor, to check the motor model, to see what type of the motor is, four lines of motor is the possibility of stepping motor is large, if it is a step motor, because of the stepper motor is by pulse current, step by step to turn, so will be more troublesome, need to MCU or stepper motor drive circuit can turn, direct access to electricity will not turn, If you turn it you can only turn it at a fixed Angle. Types and wiring of stepper motors Stepper motors are unipolar (also known as two-wire or 4-phase) and bipolar (also known as single-wire or two-phase) stepper motors. I. Unipolar stepper motor. This stepper motor is called unipolar because the current in each winding flows in only one direction. It is also known as a two-wire stepper motor because it contains only two coils. The two coils are of opposite polarity and are wound on the same core with the same middle tap. A unipolar stepper motor is also called a 4-phase stepper motor because it has four excitation windings. Unipolar stepper motors have 5 or 6 leads. If the stepper motor has 5 leads, then one of them is the common wire (connected to V+) and the other 4 are connected to phase 4 of the motor respectively. If the lead of a stepper motor is 6, then it is a multi-stage unipolar stepper motor with two windings, and each winding has an intermediate tap lead.
