The causes of stepper motor heating are as follows:
1. The current set by the driver is larger than the rated current of the motor.
2, the motor speed is too fast.
3. The inertia and positioning torque of the motor itself are large, so even medium-speed operation will generate heat, but the life of the motor will not be affected
The demagnetization point of the motor is 130-200℃, so the motor is normal at 70-90℃. As long as it is less than 130℃, there is generally no problem. If you really feel overheating, set the current of the driver to about 70% of the rated current of the motor or reduce the speed of the motor.