Poor motor wiring connection: Check if the motor wiring is secure. If there is any looseness or poor contact, try replacing the motor wiring;
Sensor position or obstruction: The material auto-loading sensor might be improperly installed or blocked. You can temporarily disable the ""Material Auto-loading"" option in the settings to see if the motor still keeps running;
Motor failure: If wiring and sensor issues are ruled out, the motor itself may be faulty. Try replacing the motor.