Electromechanical engraving uses an electronically-controlled diamond-stylus to cut the the cells into the surface of the gravure cylinder. The original copy is scanned into a computer and digitized. Each scanned and digitized image is converted to halftone-like dots, each having an electronic signal, ranging in intensity from 0:100%, depending upon the darkness or lightness of the image. The image is then converted back into an analog signal which then drives the engraving head , telling it how deep to carve the cell on the cylinder.