The working principle of pancake stepper motors is to control the stepping motion of the motor through electrical pulse signals. Whenever the motor receives an electrical pulse signal, the coil on the stator will be energized, generating a magnetic field, attracting the small teeth of the rotor, causing it to rotate a fixed angle (step angle). By continuously inputting electrical pulse signals, the motor can continuously step and achieve precise position control.

1.Stator: The stator is an important component of the pancake stepper motor. It contains magnetic poles in the shape of small teeth, and these poles are wound with coils. The magnetic poles connected by the coils in a diagonal manner are magnetized to the same polarity when energized.

‌2.Rotor: The rotor consists of rotor 1 and rotor 2, with 50 small teeth on the periphery. The small teeth of rotor 1 and rotor 2 are staggered by half a pitch in structure, which makes the motor more stable when running.

‌3.End caps‌: The front and rear end caps of the motor are used to fix and protect the internal structure of the motor and ensure the stable operation of the motor.

‌4.Bearings and center shaft‌: The bearings and center shaft support the rotating part of the motor to ensure the smooth rotation of the rotor.

‌5.Coil‌: The coil on the stator is a key component of the motor. The power-on state of the coil is controlled by an electric pulse signal to drive the rotation of the rotor.

1.High precision‌: The pancake stepper motor can achieve precise stepping according to the control signal, and has the characteristics of high precision, fast response and strong stability. This makes it widely used in mechanical equipment with high precision requirements.

2.High horsepower: Pancake stepper motors generate large torque when running, which can provide sufficient driving force for mechanical equipment. They are particularly suitable for heavy loads, low speeds and occasions with high starting torque requirements.

3.Simple control: The control signal of the pancake stepper motor only needs to output electrical pulses, which is simple and convenient to control. In addition, it can also realize the control of small steps, providing more accurate motion control for mechanical equipment.

4.High reliability: Pancake stepper motors are not easy to damage, have a long life, and have high reliability.

5.No cumulative error: Stepper motors usually have no cumulative error, and their accuracy is three to five percent of the actual step angle, and it does not accumulate.

6.Wide speed regulation range: The speed of the stepper motor changes with the pulse frequency of the input signal. Changing the input pulse frequency can achieve smooth stepless speed regulation, and the speed regulation range is quite wide.

‌7.Short start and stop time‌: The stepper motor has a small moment of inertia and a short start and stop time. It can generally rotate or reach the synchronous speed after a few milliseconds or tens of milliseconds of signal input, and the motor stops rotating immediately after the signal is cut off.

‌1.Robots and automation equipment‌: Pancake stepper motors are widely used in industrial robots, automated production lines, transport vehicles and other fields. They can accurately control the movement speed and direction of robots and improve production efficiency and accuracy.

‌2.CNC machine tools‌: In CNC machine tools, pancake stepper motors are used to control the movement of tools or workbenches. By controlling the speed and direction of the motor, high-precision processing of workpieces can be achieved.

‌3.Medical equipment‌: In medical imaging equipment such as X-ray machines, CT scanners, etc., pancake stepper motors are used to drive the movement of the scanning frame. By accurately controlling the movement of the motor, fast and accurate imaging of patients can be achieved.

‌4.Office equipment and household appliances‌: Pancake stepper motors are also used in office equipment and household appliances, such as printers, scanners, automatic door locks, electric curtains, home camera pan/tilts, etc., to provide precise control and positioning functions‌.

‌5.Other fields‌: In addition, pancake stepper motors are also used in 3D printing, aerospace equipment, entertainment and gaming equipment, and other fields. In 3D printing, pancake stepper motors are used to control the position and speed of the print head to ensure printing accuracy and quality; in aerospace equipment, they are used to control the movement of the actuator to meet the requirements of high precision and high stability‌.

Source:https://blogg.alltforforaldrar.se/enya/2025/07/18/design-advantages-and-applications-of-pancake-stepper-motor/