Abstract: A metal-cutting machine comprising a base on which are mounted a table for clamping the workpiece being machined, and longitudinal ways for the carriage, including a longitudinal guide-bar which runs through a longitudinal open-end passage in the carriage and held in position by its ends to the machine base. The carriage has its own drive, and provision is made therein for a transverse open-end passage whose axis lies in a plane parallel with that of the axis of the aforesaid longitudinal passage, the transverse passage serving as the transverse ways for the cross guide-bar fitted therein, one of the ends of the guide-bar carrying the power head with the cutting tool, while its other end is kinematically associated with the other individual drive. The self-contained drives of the carriage and cross guide-bar are controlled from a program-copying device.

Abstract: A device for automatically controlling an electroerosion cutting machine in which a unit for selecting a direction of rotation of drive motors in the course of erosion working, includes a coincidence circuit and a reversible ring shift register whose outputs are connected to inputs of the coincidence circuit, whereas the latter's outputs are electrically coupled to coordinate drive motors which move an electroerosion tool relative to the workpiece, and an optical head relative to a coordinate follow table. The optical head is electrically connected to the register and coincidence circuit via a first amplifier having four divided outputs, two of which are connected to respective inputs of the ring shift register, whereas the remaining two are connected to the inputs of the coincidence circuit.