OK this is a few years old of a build, buts its an interesting one. I like how the sliders are down instead on the sides. I can’t tell if the author used 3D printed parts in some of the nut holders. And the ond axis looks like the the nut was welded to brackets? Also the drill bit is stationary with this build vs most of the ones I see have a moving gantry.
http://www.instructables.com/id/Building-a-drawer-slide-CNC-machine-for-under-200/