ELECTRIC DISCHARGE MACHINE

摘要

PURPOSE:To uniformly process the work of machining of a work, by finely changing the amount of relatively shifting speed between electrodes and the work. CONSTITUTION:A controller 16 controls a rotary drive device 5 for a roll-shaped work 3 not to keep constant but change a fine amount of rotational speed of the work 3, permit electrodes 11 to process an electric discharge machining on circumferential faces of the work 3 thus obtain an uniformity in the surface roughness of its satin finish.