I have the Linksprite engraving machine[1], there are a bunch of companies selling the same design if you search for "CNC 1610" on any of the major e-tailer sites. It's called 1610 because the build area is 16x10cm, there are larger versions called 2418 and 3018.
At the price point it's obviously the bargain basement model of the CNC world and the quality is not great. But it works fine for PCBs as long as you don't need super narrow traces, the backlash is surprisingly not terrible thanks to the preloaded nuts.
I use FlatCAM to generate gcode from the PCB gerber files. Then just load up a copper clad board on the machine and let it cut away the copper until only your traces are left.
At the price point it's obviously the bargain basement model of the CNC world and the quality is not great. But it works fine for PCBs as long as you don't need super narrow traces, the backlash is surprisingly not terrible thanks to the preloaded nuts.
[1] http://store.linksprite.com/diy-cnc-3-axis-engraver-machine-...