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.
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