BLADE EXCHANGE UNIT

(Task) To provide a blade exchange unit that can easily obtain the position of a mount on which a cutting blade is mounted. (Solution means) The blade exchange unit includes a blade chuck for holding a cutting blade， a moving unit for moving the blade chuck， and a control unit for controlling the moving unit. The blade chuck has a plurality of conductive claws that hold the cutting blades. The control unit detects the conduction of the claw and the boss portion. The control unit controls the moving unit to contact the claw to at least three points of the mount to determine the position of the axis of the mount from the coordinates that detect the conduction， and the axis of the blade chuck to the axis of the mount calculated by the calculation unit. It includes a detachable control unit for attaching and detaching the cutting blade accordingly.