1.Somethingwrongwithelectricalwiringor
electricalwiringdamaged
2.Electricalmotordamaged
3.Overloadedtoobigorbearingdamaged
1.Checktheelectricalwiringorchangeit.
2.Maintainelectricalmotororchangeit
3.Slowerthefeedingspeedorchangethebearing；
Thecapacitynot
uptostandard
1.Shortageofrawmater