The brake function of the spindle motor is not working.

Causes could be:

1-      Brake circuit problem or strong current components broken.

Solution: Check if there is bridge rectifiers, fuse, AC contactor broken or not? Or open circuit of the strong circuit?

2-      Brake time not enough.

Solution: Adjust the CNC or inverter’s brake time parameter.

3-      CNC no brake signal output.

Solution: replace the defect components or send back for repair.

4-      Parameters of the inverter are not correct.

Solution: Set the parameters right of the inverter with the user manual.

Spindle motor specification:

http://www.cncmakers.com/cnc/controllers/Spindle_Motor_Driver/AC_Asynchronous_Servo_Spindle_Motors.html