A laser machining device can be used to direct two independent laser beams onto the same machining field in a single machining process. Next to the open ends of at least some of said holes, a clearance of the linking member is provided, preventing any contact at said point between the latter and said links. The charge circuit is set on the circuit board. The sleep transistor circuitry is coupled to the first circuitry and receives a sleep signal that has a negative voltage.