Robert
I do now understand. You helped a lot and with understandable input. You understand that software and the relations quite well.
In my mind, I thought 1 unit would always be 1mm as UCCNC is in MM. I did not think about those different setups around in the world which UCCNC needs to address.
That is the reason I did not make the connection on the 1000/2.5. I feel bit stupid now but happy
UCCNC must have an Mill setup with an ball screw size where 1 unit is 1mm as a standard. And every other must be scaled up or down to get 1mm per unit.
I understand now.
You were of great help Robert. So thank you very much!
Karl