EDM machine tool's zero system of returning

The utility model discloses a EDM machine tool's zero system of returning, the system includes the industrial computer, including motor drive, the motion control card, movement module, the rotary encoder, photoelectric switch and motor, industrial computer control action control board, motor drive is connected respectively to the motion control card, rotary encoder and photoelectric switch, motor drive passes through the motor control shaft motion, drive movement module, the rotary encoder feeds back the card to motion control with axle motion information in real time, photoelectric switch accepts signal feedback to motion control card. The zero -bit highly uniform nature of this system is guaranteed repeated coordinate system uniformity of cut -offfing electric back lathe and is guaranteed repeatability, has guaranteed to avoid processing or operation to programme and bump, prevents to cause the work piece damage, scraps to descend with precision of the machine to reduce the lathe and shut down the loss, red