... then the cable is released,at this time,the motor of cable drum stop working and skid institutions begin ... side,then cable is released,at this time,the motor of cable drum go on working,skid institutions ... of power-supply wiring for cable reel drum's motor.MAINTAINING1,The constant tension cable reel drive box ... new oil.2,If the slip ring was be electrical corroded ,burned ,it should be polished by thin ...