Device for automatically controlling an electroerosion cutting machine

A device for automatically controlling an electroerosion cutting machine, comprising:

• a coordinate follow table with a drawing placed thereon;
• an optical reading head;
• coordinate drive motors which move coordinate-wise said optical reading head relative to said drawing and an electroerosion tool relative to a workpiece;
• a first amplifier having an input connected to the output of said optical reading head, and four outputs;
• a second amplifier having an input connected to the erosion gap, and two outputs;
• a unit for setting initial conditions of electroerosion working having outputs;
• a unit for selecting directions of rotation of said drive motors in the course of said electroerosion working and having inputs and outputs;
• a reversible ring shift register of said unit for selecting directions of rotation of said drive motors and having inputs and outputs, inputs of said reversible ring shift register being connected to outputs of said unit for setting initial conditions of electroerosion working intended for a signal of initial rotation directions, said outputs of the unit for setting initial conditions of electroerosion working being intended for a signal of shift speed of said reversible ring shift register, and said first and second outputs of said first amplifier being intended for signals for reversing the shift direction of said register;
• a coincidence circuit in said unit for selecting directions of rotation of said drive motors and having inputs and outputs, inputs of said coincidence circuit being connected to said third and fourth outputs of said first amplifier, said outputs of said reversible ring shift register, said outputs of said second amplifier, and outputs of the unit for setting initial conditions of electroerosion working being intended for a signal of preset rotation speeds of said drive motors;
• a third amplifier having three inputs connected to the said three first outputs of said coincidence circuit, and two outputs connected to said drive motors for moving said optical head relative to said coordinate table and said electroerosion tool relative to said workpiece along the first coordinate;
• a fourth amplifier having three inputs connected to said three other outputs of said coincidence circuit, and two outputs connected to said drive motors for moving said optical head relative to said coordinate table and said electroerosion tool relative to said workpiece along the second coordinate.