SPEED UNSTABLE

1、Use voltmeter to test the power make sure its in the range of 220V±15%.

If the grid are beyond the range,please ask for professionals.

Change the invertor to a normal one and check the error is be excluded.

3、OTHER PROBLEMS:

Ø  The running belt too tighten；

Ø  The running belt is loose；

Ø  The friction between belt and board gap too big；

Ø  The drive motor was damaged.