CNC GSK980TA1 User:

We are making thread with G92 on GSK980TA1 CNC lathe machine.

Tool offset U-0.2, Z axis thread has error in negative way about 1/3 pitch, then we use U0.2 to make compensation, but still not solved.

1. The tool post positioning is correct.
2. The coupling of Z axis is working fine.
3. Backlash of the ball screw is fine.
4. Encoder is working fine, even we change another encoder, there is same error.

What could be the problem?

CNCmakers Support:

If all the thread teeth are average, then the encoder lines setting on the CNC GSK980TA1 might not matching with the spindle encoder, normally it is 1024 lines.