Abstract
In ECM process, since the machining takes place in the wide-area where the machining current flows, it is difficult to confine the machined area. Additionally, in order to feed the tool electrode appropriately during the machining, the gap-width detection is necessary. In this research, in order to confine the machining area and detect the gap width, the tool electrode which is capable of not only circulating electrolyte beneath the tool electrode but also detecting the gap width by measuring the suction pressure was proposed. It is found the suction pressure indicates the gap width and the pressure signal can be used to control the tool electrode feed.
