Not quite sure what you mean but from the 3dprinter.png drawing the axies would be defined as:
X: left to right - Max size from "Printer geometry.PNG" is 200mm
Y: front to back - Max size from "Printer geometry.PNG" is 200mm
Z: down to up - Max size from "Printer geometry.PNG" is 180mm
Is this what you mean??
Play Bonny!
Soadyheid