How to Disassemble a 1.8 Degree Stepper Motor?

A stepper motor is a motor that converts electrical pulse signals into corresponding angular displacement or linear displacement. Each time a pulse signal is an input, the rotor rotates an angle or moves forward one step, the angular displacement or linear displacement it outputs is proportional to the number of input pulses, and the rotational speed is proportional to the pulse frequency. Therefore, the ATO stepper motor is also called a pulse motor.

In the case of non-overload, the speed and stop position of the motor only depend on the frequency and number of pulses of the pulse signal, and are not affected by load changes. When a pulse signal is added to the motor, the motor rotates at one step angle. With the existence of this linear relationship, the stepper motor has only periodic errors and no cumulative errors. This makes it easier to use stepper motors to control speed, position, and other areas of control.

This is an ATO stepper motor with a step angle of 1.8%. Let's disassemble its shell to see what's inside.

Dismantling process

1. Remove 4 fixing screws.
2. Open the front cover. We can see its rotor and bearings.
3. Open the coil protection cover carefully.
4. Then we can try to pull out the rotor. Some stepper motors have a tighter back-end bearing, so taking out the rotor will take a bit of effort. The spring washer at the rear end was also sucked out
   There is one more inside.
5. The gasket is installed at the end of the motor and contacts the end face of the bearing. There are stator slots inside, and there are 4 sets of coils around the slots. Face to face as a group. Both ends of the rotor are bearings. Each rotor has 50 teeth. The stepper motor receives a pulse and the rotor rotates 1.8.
6. The rotor has strong magnetism. This is the internal composition of the stepper motor.
7. Replace all parts.

To learn more about dismantling a 1.8 degree stepper motor, watch the video below.