G92 or G32 for screw thread not working
The CNC controller is not working on G92 or G32, the X and Z axis are even not moving, but G99 is normal to turn the end face and excircle of the workpiece under AUTO mode.
It could be several causes:
1- Encoder wiring problem of the AC servo motors.
2- Encoder hardware problem of the AC servo motors.
3- I/O board problem of the CNC controller.
4- Clutch slipping.
In this case we found there is a cold solder joint on Zero signal cable of the Z axis encoder, fix it then everything is fine.