A wire electrical discharge machine comprises: an average inter-electrode voltage calculation unit that calculates an average inter-electrode voltage between electrodes; a correction unit that calculates a corrected average inter-electrode voltage, in accordance with a machining speed of a wire electrode with respect to a workpiece; and a motor control unit that makes a dimension between the electrodes during machining constant by controlling an X-axis motor and a Y-axis motor on the basis of the corrected average inter-electrode voltage. The correction unit calculates the corrected average inter-electrode voltage, on the basis of a formula with the average inter-electrode voltage as a numerator, and a value obtained by multiplying a coefficient by the machining speed as a denominator.

A wire electrical discharge machine comprises: an average inter-electrode voltage calculation unit that calculates an average inter-electrode voltage between electrodes; a correction unit that calculates a corrected average inter-electrode voltage, in accordance with a machining speed of a wire electrode with respect to a workpiece; and a motor control unit that makes a dimension between the electrodes during machining constant by controlling an X-axis motor and a Y-axis motor on the basis of the corrected average inter-electrode voltage. The correction unit calculates the corrected average inter-electrode voltage, on the basis of a formula with the average inter-electrode voltage as a numerator, and a value obtained by multiplying a coefficient by the machining speed as a denominator.

A control device includes: a control unit configured to control a main processing machine by replacing a machining shape on a machining surface of a workpiece specified in a program with a shape corresponding to an enlargement/reduction ratio and replacing a fixing distance for a core specified in the program with a distance corresponding to the enlargement/reduction ratio for the machining shape of the workpiece and a plate thickness ratio between the workpieces.

A control device includes: a control unit configured to control a main processing machine by replacing a machining shape on a machining surface of a workpiece specified in a program with a shape corresponding to an enlargement/reduction ratio and replacing a fixing distance for a core specified in the program with a distance corresponding to the enlargement/reduction ratio for the machining shape of the workpiece and a plate thickness ratio between the workpieces.

An electric discharge machining (EDM) system includes an electrode set having a plurality of electrodes. Each electrode is electrically-isolated from the other electrodes. The EDM system includes a power supply configured to generate an electric discharge between a workpiece and the electrode set to remove material from the workpiece. The power supply includes a multi-loop driver system and an AC-to-DC component that outputs DC electric power. The multi-loop driver system includes a plurality of power loop circuits coupled to an output of the AC-to-DC component. Each power loop circuit is electrically-isolated from other power loop circuits and is coupled to at least one electrode. The multi-loop driver system includes a drive controller coupled to the power loop circuits. The drive controller is configured to transmit at least one control signal to at least one power loop circuit to drive the AC-to-DC component to generate the electric discharge.

An electric discharge machine includes an electrode, a shaft-feed driving unit that, a voltage/current applying unit, a shaft-feed control unit that causes the shaft-feed driving unit to perform a jump operation, and a machining-condition setting and changing unit that sets a voltage applied between the electrode and a workpiece and an electric current flowing between the electrode and the workpiece. The machining-condition setting and changing unit determines whether the electric discharge between the electrode and the workpiece stabilizes after the jump operation ends and, in at least a part of a period before determining that the electric discharge stabilizes, sets at least one of the voltage and the electric current to a condition in which electric discharge more easily occurs than in the condition in applying the electric discharge machining.

An electric discharge machine includes an electrode, a shaft-feed driving unit that, a voltage/current applying unit, a shaft-feed control unit that causes the shaft-feed driving unit to perform a jump operation, and a machining-condition setting and changing unit that sets a voltage applied between the electrode and a workpiece and an electric current flowing between the electrode and the workpiece. The machining-condition setting and changing unit determines whether the electric discharge between the electrode and the workpiece stabilizes after the jump operation ends and, in at least a part of a period before determining that the electric discharge stabilizes, sets at least one of the voltage and the electric current to a condition in which electric discharge more easily occurs than in the condition in applying the electric discharge machining.

A program generating apparatus includes a machining program generating unit configured to generate a machining program for controlling a wire electrical discharge machine so as to machine a workpiece in accordance with a machining shape of the workpiece input by a user and so as to fix a core which is produced when the workpiece is machined, to the workpiece. In the program generating apparatus, a core handling program generating unit generates a core handling program for controlling a robot so as to remove the core from the workpiece by applying an impact to the core in accordance with the input machining shape of the workpiece.

A program generating apparatus includes a machining program generating unit configured to generate a machining program for controlling a wire electrical discharge machine so as to machine a workpiece in accordance with a machining shape of the workpiece input by a user and so as to fix a core which is produced when the workpiece is machined, to the workpiece. In the program generating apparatus, a core handling program generating unit generates a core handling program for controlling a robot so as to remove the core from the workpiece by applying an impact to the core in accordance with the input machining shape of the workpiece.

An electrical machining method comprises machining a workpiece by an electrical machining device comprising an electrode; increasing a feedrate of the electrode at a first acceleration if a discharge current passing through the electrode and the workpiece is lower than a discharge current reference; and decreasing the feedrate of the electrode at a second acceleration if the discharge current is higher than the discharge current reference, wherein the second acceleration has an absolute value higher than that of the first acceleration.