A wire electrical discharge machine includes: a determination unit that determines whether or not a first route and a second route, each including an approach path, a machining path and an escape path in this order, are set in this order as a movement route of a wire electrode; and a wire movement control unit that, when the first route and the second route are determined to be set in a machining program in this order as the movement route of the wire electrode, causes the wire electrode to transition from the machining path of the first route to the machining path of the second route without moving the wire electrode along the escape path of the first route and the approach path of the second route.

A wire electrical discharge machine includes: a determination unit that determines whether or not a first route and a second route, each including an approach path, a machining path and an escape path in this order, are set in this order as a movement route of a wire electrode; and a wire movement control unit that, when the first route and the second route are determined to be set in a machining program in this order as the movement route of the wire electrode, causes the wire electrode to transition from the machining path of the first route to the machining path of the second route without moving the wire electrode along the escape path of the first route and the approach path of the second route.

The invention relates to a method and device for wire electrical discharge machining (WEDM), in which a first voltage UCH1 is measured between a first current feeder and the workpiece, and a second voltage U.sub.CH2 is measured between a second current feeder the workpiece, whereas said first- and second voltage U.sub.CH1, U.sub.CH2 are measured when current of the machining discharge pulse is zero, for instance at the end of the of the machining discharge current pulse, and a voltage difference of said measured voltages ΔU.sub.CH=U.sub.CH1−U.sub.CH2 is determined, and a discharge position of said machining discharge pulse is determined in real time, as a function of said voltage difference ΔU.sub.CH.

The invention relates to a method and device for wire electrical discharge machining (WEDM), in which a first voltage UCH1 is measured between a first current feeder and the workpiece, and a second voltage U.sub.CH2 is measured between a second current feeder the workpiece, whereas said first- and second voltage U.sub.CH1, U.sub.CH2 are measured when current of the machining discharge pulse is zero, for instance at the end of the of the machining discharge current pulse, and a voltage difference of said measured voltages ΔU.sub.CH=U.sub.CH1−U.sub.CH2 is determined, and a discharge position of said machining discharge pulse is determined in real time, as a function of said voltage difference ΔU.sub.CH.

There is provided a wire electrical discharge machine that includes a temperature detection unit, an actual position correction amount calculation unit, a correction amount calculation unit, a correction amount adjustment unit, a position correction amount adjustment unit, and a corrective movement amount calculation unit. The actual position correction amount calculation unit calculates an actual position correction amount for an upper/lower guide section in accordance with reference position coordinates at a reference temperature and with actual position coordinates at a temperature different from the reference temperature. The correction amount calculation unit uses a prepared correction amount arithmetic expression. The correction amount adjustment unit calculates a correction amount adjustment value from the actual position correction amount and the position correction amount.

There is provided a wire electrical discharge machine that includes a temperature detection unit, an actual position correction amount calculation unit, a correction amount calculation unit, a correction amount adjustment unit, a position correction amount adjustment unit, and a corrective movement amount calculation unit. The actual position correction amount calculation unit calculates an actual position correction amount for an upper/lower guide section in accordance with reference position coordinates at a reference temperature and with actual position coordinates at a temperature different from the reference temperature. The correction amount calculation unit uses a prepared correction amount arithmetic expression. The correction amount adjustment unit calculates a correction amount adjustment value from the actual position correction amount and the position correction amount.

The disclosure provides a wire electric discharge machine and a wire electric discharge machining method capable of detecting concentrated electric discharge in real time by a discharge position obtained from a preliminary discharge current, and calculating an accurate discharge position for use in measuring a plate thickness or the like. The wire electric discharge machine according to the disclosure includes a discharge position calculation circuit calculating a discharge position from the preliminary discharge current respectively detected through a current detector during a first period from a time when a waveform of the preliminary discharge current supplied to a machining gap, formed by a wire electrode and a workpiece, rises to a time when the preliminary discharge current reaches a constant current value, and a second period after the time when the preliminary discharge current reaches the constant current value to a time when a main discharge current is supplied.

The disclosure provides a wire electric discharge machine and a wire electric discharge machining method capable of detecting concentrated electric discharge in real time by a discharge position obtained from a preliminary discharge current, and calculating an accurate discharge position for use in measuring a plate thickness or the like. The wire electric discharge machine according to the disclosure includes a discharge position calculation circuit calculating a discharge position from the preliminary discharge current respectively detected through a current detector during a first period from a time when a waveform of the preliminary discharge current supplied to a machining gap, formed by a wire electrode and a workpiece, rises to a time when the preliminary discharge current reaches a constant current value, and a second period after the time when the preliminary discharge current reaches the constant current value to a time when a main discharge current is supplied.

The invention relates to a method for electrical discharge machining of workpieces by electrical discharge pulses generated by a power module of an electrical discharge machine. The invention is characterized in that firstly the discharge voltage of a number N1 of electrical discharge pulses is acquired and stored, secondly a front discharge voltage (63) is determined out of this amount of N1 acquired discharge voltages and thirdly, the voltage Uhps (64) of the electrical discharge pulses produced by the power module for machining the workpiece (17) is adjusted in function of the determined front discharge voltage (63).

The invention relates to a method for electrical discharge machining of workpieces by electrical discharge pulses generated by a power module of an electrical discharge machine. The invention is characterized in that firstly the discharge voltage of a number N1 of electrical discharge pulses is acquired and stored, secondly a front discharge voltage (63) is determined out of this amount of N1 acquired discharge voltages and thirdly, the voltage Uhps (64) of the electrical discharge pulses produced by the power module for machining the workpiece (17) is adjusted in function of the determined front discharge voltage (63).