Hi Clive thanks for the reply,
In the case of my SZGH CNC1000TDb it uses: set P16 on User parameters,diameter or radius programming.
The stepper pulses need to be matched at 10,000 on the stepper drive and in Axis Parameter No.17 Numerator of X Electron gear also set to 10,000.
I will set the No18 moved distance in diameter (P16) and see if that is correct.

Regards
Colin