Here is a mod to a 3D printer to turn it into an EDM machine.
hackaday.com
Just look at some of the metal parts made..
Powercore Aims To Bring The Power Of EDM To Any 3D Printer
The desktop manufacturing revolution has been incredible, unleashing powerful technologies that once were strictly confined to industrial and institutional users. If you doubt that, just look at 3D…
hackaday.com