And cheap it is. The Y is an old printer carriage, X is an old flatbed scanner. An arduino with homemade motor controllers is controlling everything. Hold on, I think he is using stepsticks…it seems to switch. The laser is from a DVD player. If you don’t count the arduino, everything was made from scraps.
http://davidegironi.blogspot.com/2015/12/a-diy-a4-laser-engraver-made-from.html#.VmHO6sv7s_t