1. Screw hoist in the air before the test, it should be all the bolts and then a strong, especially the vibration of the electromagnetic anchor bolts, in the continuous operation of 3-5 hours, should be re-tightened once.
3. Spiral lift bearings should always be filled with lubricating oil.
2. Spiral hoist feeding in the course of the operation should always check the amplitude, current and noise stability, found that abnormal parking should be timely processing.
