What's wrong with the foot grinder not working?

1. Power supply problem
First, check whether the power of the foot grinder is turned on or whether the power plug is loose. If the power supply is normal, you can use a voltmeter to check whether the voltage of the power supply is normal. If the voltage is too low or too high, the foot grinder will not operate normally.
2. Motor problem
If the foot grinder does not rotate after being powered on, it may be caused by motor failure. Check whether the motor makes any abnormal noise or heat. If so, the motor may need to be replaced or repaired.
3. Transmission system problems
If the transmission system of the foot grinder is not smooth, it may cause the foot grinder to fail to rotate when power is turned on. It is necessary to check whether the transmission belt is cracked or loose, and whether the transmission gear is worn or stuck.