There are several cases of abnormal noise when the servo motor is running:
The first case:
The first and end wiring of the stator winding is wrong, there is a low roar, and the speed also drops. Inspection is correct.
The second situation:
When the bearing is seriously short of oil, a "hissing" sound can be heard from the bearing chamber. Bearings should be cleaned and new oil added. The wind blades hit the shell or have debris, making a crashing sound. The fan blades should be calibrated and debris around the blades should be removed.
The third situation:
The Panasonic servo motor runs out of phase and the roar is extremely loud. You can cut off the power and then close it again to see if it can start normally again. If it cannot start, one phase fuse may be broken, and one phase of the switch and contactor contacts may not be connected, which will also cause phase loss operation.
The fourth situation:
When the stator and the rotor rub against each other, a harsh "chacha" sound will be produced, which is mostly caused by bearing failure. The bearings should be inspected and damaged ones replaced. If the bearings are not damaged and the bearings are found to be running on the inner or outer rings, the bearings and end caps can be inserted or replaced.
The fifth situation:
When the cage rotor guide bar is broken or the wound rotor winding joint is disconnected, there will sometimes be a high and sometimes low "buzzing" sound, and the rotation speed will also slow down. , the current increases and should be checked and dealt with. In addition, the lengths of the rotor and stator of some Panasonic servo motors do not match well. For example, if the length of the stator is too much longer than the length of the rotor, or the bearing hole of the end cover is too worn, the rotor will move axially, which will also produce a "buzzing" sound. .