Abstract: An electrical discharge machine with a machine is shown bed, a work tank filled with a dielectric fluid and vertically adjustable in which a work table is arranged, a generator and a control unit. All units of the machine are surrounded by a metal structure. Additional units can be integrated into the metal structure.

Abstract: A device comprising an element mounted on the frame 1 and having a microswitch 8 that can be actuated by a mechanical part 9 and which causes the machining current to be cut off when this part 9 arrives opposite it when the machining head 5 moves up.The mechanical part 9 is movable along the guide rod 10 mounted on the machining head 5 and can be fixed at a given height at the start of machining. This height is such that the distance h between the part 9 and the microswitch 8 is less than the distance H between the surface of the workpiece 4 and the level of the machining liquid.The part 9 moves as one with the machining head 5.