The shaft on the sewing machine motor ran out.

What you want to ask is why the shaft on the sewing machine motor runs out. There are the following reasons:

1. Belt slack: The motor of sewing machine is usually driven by belt. If the belt is slack or worn, the output torque of the motor will be insufficient and the shaft on the motor will run off.

2. Wear of motor bearing: After long-term use, the motor bearing of the wrapping machine will be worn or damaged, resulting in uneven rotation of the motor, thus causing the shaft to run off.

3. Improper motor adjustment: Improper motor adjustment during installation or maintenance, such as eccentric motor and inaccurate positioning, will also cause shaft deviation.

4. Unstable power supply voltage: Unstable power supply voltage connected to the sewing machine or poor contact of the power supply wire will also affect the normal operation of the motor and make the shaft run off.