I made a 5x10 foot cnc out of the parts I bought on this site. It's been upgraded and tinkered with ever since. The end goal is to learn enough to learn to build a large 10x10 foot 3d printer.

This is a C-Beam based router with V-rails used for the bed, a Sherline spindle with Jacobs chuck, closed loop stepper motors on every axis and an offline 4-axis CNC controller. A U-channel was created to guide the drag chain on the X-axis.