CNC Engraving
From DT Online
Engraving is the practice of incising a design on to a hard, usually flat surface, by cutting grooves into it.
Traditionally it was a hand process using small cutting tools called Burin and was how copper printing plates used to be made. Hand engraving is still used today be artist/craftsmen but most is now done using a CNC engraving machine.
CNC Engravers can be used as a mini-router or milling machine for small scale work in acrylic, close-grained timbers, manufactured board, or softer metals. Models are available specifically designed for engraving electronic circuits using copper-clad board and some have a limited 3D capability.