Cyril
Mar 291. The rotation angle of the motor is proportional to the number of pulses. 2. When the motor stops rotating, it has the maximum torque (when the winding is excited). 3. Due to the accuracy of each step being between 3% and 5%, and not accumulating errors from one step to the next, it has good positional accuracy and motion repeatability. 4. Excellent start stop and reverse response. 5. Due to the lack of brushes and high reliability, the lifespan of the motor only depends on the lifespan of the bearings. 6. The response of the motor is only determined by digital input pulses, so open-loop control can be used, which makes the structure of the motor relatively simple and cost-effective. 7. Simply connecting the load directly to the motor shaft can also achieve extremely low speed synchronous rotation. 8. Due to the speed being proportional to the pulse frequency, there is a relatively wide range of rotational speeds. Compared to ordinary motors, stepper motors can achieve open-loop control, which controls the angle and speed of the stepper motor through the number and frequency of pulses input from the driver signal input end, without the need for feedback signals. However, stepper motors are not suitable for long-term operation in the same direction, as they are prone to burning out the product. Therefore, it is usually better to operate frequently over short distances during use. Compared to servo motors, feedback control is achieved through the installation of a rotary encoder inside the servo motor. The torque that the servo motor can achieve is higher than that of the stepper motor, but the price is relatively high. Therefore, it is recommended to use a stepper motor when the torque can be met. Stepper motors are used in conjunction with drivers, and many drivers support subdivision function, which achieves very small step angles and more precise control.
Gilbert
Mar 29The stepper motor itself is used for position control, especially when the speed is not very high. The torque and accuracy are both quite good, the control is simple, and it is also cheap.