First, the shutdown of the spindle during strong cutting may be caused by the loose transmission belt between the spindle motor and the spindle. The too small transmission torque of the spindle makes the torque insufficient during strong cutting, resulting in the automatic shutdown of the NC machine tool. At this time, the tension of the spindle drive belt can be readjusted to eliminate the stalling problem.

Second, there is oil on the surface of the transmission belt connected between the motor and the spindle, which may also lead to the slip of the transmission belt during spindle transmission, resulting in insufficient torque of the spindle during strong cutting and automatic shutdown of the machine tool. At this time, you can wipe it with alcohol or gasoline to eliminate the problem.

Third, the failure of the transmission belt after being used for too long may also lead to the problem that the torque of the spindle motor cannot be transmitted. In the process of strong cutting, the insufficient torque leads to automatic shutdown. At this time, the problem can be eliminated by replacing the old spindle drive belt.

Fourth, the excessive torque transmission error of spindle motor may also be caused by the coupling connection or clutch wear in the transmission mechanism. The spindle vibrates strongly during strong cutting, resulting in automatic shutdown. The treatment of this problem can adjust or replace the clutch or coupling.

Therefore, if the motorized spindle stops running, you can check the root cause of the problem in turn according to the above steps, find the root cause of the automatic shutdown of the machine tool, and then take effective measures to solve the existing problems.