Hi,
I have a small chinese miller (x travel 400mm, y 150mm, z 85mm) that I converted some years ago to CNC using unipolar Compucut system plus ballscrews. I am currently converting to bipolar using DIYCNC System4, Mach3 plus Kflop usb interface.
I am considering building a gantry router with a bed size of about 1200mm x 600mm.
Searching this forum has proved very useful in solving any problems that I have had.
Cheers
Rob