Over the last year I've been designing and building Domo, my cnc milling machine. He's currently on rev 4 and I'm finally satisfied with the design (my inner ocd disagrees but whatever).
I determined the following constraints given my lack of metal working skills
Leverage existing components (8020 aluminum, pre-made linear rails, etc)
Minimal manual milling (only 3 parts require high precision)
Easy to adjust and align
Below is the latest. Perhaps I'll post some of his previous forms in the future.
A few features
Workspace: 55" x 29" cutting surface with 6" travel on the z axis