The Hackerspace Kraków in Poland hosts a weekly event on Fridays called NightHack. The idea is simple. It’s late Friday night, all the stores are closed — something needs to be hacked.
Just this past Friday night, they decided to try making a CNC machine using only what they had in the space. And gosh darn it, did they ever succeed! The build makes use of an Arduino Mega, broken Playstation 3 drives, a few spare L293D ICs, some hot glue, and wood. The resulting CNC machine is an awesome example of what can be done in a night with the right group of people working together.
It might not be powerful enough to do milling, but works quite well as a small CNC drawing plotter with its massive 5x5cm work area, with a resolution of 0.16mm. Next week they hope to modify it to allow for PCB drilling, which at the right feed rates, might just be possible!