Methods for controlling the surface profiles of wafers sliced from an ingot with a wire saw include measuring an amount of displacement of a sidewall of a frame of the wire saw. The sidewall is connected to a bearing of a wire guide supporting a wire web in the wire saw. Based on the measured amount of displacement of the sidewall, a pressure profile for adjusting a position of the sidewall is determined by a computing device. Pressure is applied to the sidewall using a displacement device according to the determined pressure profile to control the position of the sidewall.

A controller for controlling a wire electric discharge machine is configured to monitor the remaining lifetime of a wire electrode and calculates an electric discharge machining time, thereby determining the timing of replacement of the wire electrode, so that it can recognize the timing of interruption of electric discharge machining. Consequently, a program operation can be suspended and the wire electrode can be cut and automatically replaced at that timing. After the replacement of the wire electrode, moreover, the wire electrode can be connected and the program operation can be restarted.

The disclosure provides a machining program generating device of a wire discharge machine, a machining program generating method, a wire discharge machining system and a machined object manufacturing method. The machining method of the wire discharge machine of the disclosure includes: a processing of forming and machining a claw part on at least one of a machining path of a machining groove and a machining path of a dividing line for dividing a core that forms an inner part of a workpiece separated by the machining groove; and a processing of separating the core from the workpiece by dividing at the dividing line.

A wire electric discharge machine with tension monitoring function comprising a tension generation unit configured to generate tension in the wire electrode, a first tension measurement unit set on the wire electrode and configured to measure tension, and a tension control unit configured to feedback tension value measured by the first tension measurement unit and output tension command value to the tension generation unit such that the tension value is equal to a target value, wherein a warning signal is configured to be generated when the tension command value output by the tension control unit is not within a set range corresponding to the target value of the tension.

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 wire electrical discharge machine and a wire electrical discharge machining method are provided. The wire electrical discharge machine is equipped with a core position recognizing unit configured to recognize the position of a core which is fixed by a core fixing function, a core removal unit configured to remove the core, which is in the recognized position, from a workpiece on which machining has been performed, and a core removal determining unit configured to determine whether or not the core in the recognized position has actually been removed.

A wire electrical discharge machine includes a wire feeding hole position acquisition unit configured to obtain a position of a wire feeding hole that allows for insertion and feeding of a wire electrode. In this wire electrical discharge machine, when the position of the wire feeding hole obtained by the wire feeding hole position acquisition unit is deviated from a wire feeding position defined by a machining program, a wire feeding control unit controls a machine main body to move the wire electrode to the position of the wire feeding hole and feed the wire electrode there, and a machining control unit controls the machine main body to perform electrical discharge machining on a workpiece with the wire electrode while moving the wire electrode on a path segment between a position where the wire electrode has been fed and the wire feeding position defined by the machining program.

The wire electric discharge machining device includes a wire bobbin configured to wind and hold a wire electrode, a wire delivery means configured to draw the wire electrode from the wire bobbin and deliver the wire electrode continuously toward a work-piece, a load applying means configured to apply a load to the wire bobbin in a direction against the drawing of the wire electrode, rotation speed detection means configured to detect a rotation speed of the wire bobbin, an emptiness determination means configured to determine that the wire bobbin reaches an empty state based on a rapid change in the rotation speed of the wire bobbin detected by the rotation speed detection means, and a drive control part configured to stop the drive of the wire delivery means when the emptiness determination means determines that the wire bobbin reaches the empty state.

A wire electrical discharge machine includes: a supporting member for relatively moving a wire electrode relative to a measurement target; servomotors for moving the supporting member; a setting changer for changing the setting of a directive speed; and a motor controller that controls the servomotors in performing move-and-contact detection for detecting contact between the wire electrode and the measurement target by moving the two relative to each other, so that the wire electrode is moved relative to the measurement target based on the directive speed changed and specified by the setting changer.

In a wire electric discharge machine of the present invention, a control variable detection apparatus is an inter-pole voltage detection apparatus and detects an average inter-pole voltage as a control variable correlating with an inter-pole distance. The wire electric discharge machine comprises a machining feed speed calculation apparatus determining a machining feed speed on the basis of a deviation between target voltage set by a target value setting apparatus 7 and the average inter-pole voltage so as to eliminate the deviation. The wire electric discharge machine further comprises a feed speed distribution apparatus and a relative movement apparatus. The inter-pole distance can be kept constant by the relative movement of a wire electrode and a workpiece made on the basis of a command of thus determined machining feed speed.