First, the spindle can be cut when the strong cutting may be the spindle motor and the spindle connected to the drive belt is too loose due to the spindle drive torque is too small to make strong cutting torque, resulting in automatic shutdown of CNC machine tools. In this case, the tension of the spindle belt can be readjusted to eliminate the stop problem.

Second, the motor and the spindle connected to the surface of the belt with oil may also lead to the spindle drive when the belt slip phenomenon, resulting in the spindle in the strong cutting torque when the machine automatically shut down. At this time you can use alcohol or gasoline to wipe it to rule out the problem.
 
Third, the use of long drive belt failure may also cause the spindle motor torque can not drive the problem, in the strong cutting process, resulting in insufficient torque shutdown. At this time only need to replace the old spindle belt can rule out the problem.
 
Fourth, the spindle motor torque transmission error is too large may be the transmission mechanism in the coupling or clutch wear caused by the spindle in the strong vibration when the strong vibration, which led to automatic shutdown. The handling of this problem can be adjusted or replaced by a clutch or coupling.
 
Therefore, if you encounter electric spindle stop, you can follow the above steps in turn to troubleshoot the root causes of the problem, looking for the root cause of machine downtime, can take effective measures to solve the existing problems.