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.

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. The measured amount of displacement of the sidewall is stored as displacement data. Based on the stored data, 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 wire electrical discharge machine includes: a mounting table having a placement plane on which a workpiece can be placed; a first guide portion and a second guide portion for stretching a wire electrode therebetween. The first guide portion is integrally equipped with a probe. The relative position in the placement plane between the probe detecting its abutment with the workpiece and the first guide portion before moving the relative position between the first guide portion and the second guide portion is stored as an offset. This offset is corrected based on the tilt information indicating the tilt state of the workpiece relative to the placement plane. Thus, it is possible to obtain the corrected offset in accordance with the tilt state of the workpiece after changing the relative position between the first guide portion and the second guide portion.

A wire electric discharge machining apparatus includes a machining unit that forms a product part by cutting off an outer frame portion from a workpiece and a control device that controls the machining unit. The machining unit machines a first boundary region in a boundary between a member to be the outer frame portion and a member to be the product part to leave an uncut portion, cuts off the product part from the outer frame portion by machining a second boundary region, which is the uncut portion, and repeats machining for the first/second boundary regions. The uncut portion has a side crossing a machining direction in machining the second boundary region, and when machining the second boundary region, the control device controls the machining unit to start the machining from the crossing side.

A wire electrical discharge machine obtains position error information indicating a position error in a planar direction in a workpiece placed on a mounting table after relative positions between a first guide unit and a second guide unit are changed, and calculates a position of the workpiece with the corrected position error in the planar direction in a state where a wire electrode is inclined according to an inclined state of the workpiece by using this position error information.

An electrical discharge machine includes: a machining power supply having a plurality of different circuit states, and configured to be capable of being set to one circuit state of the plurality of circuit states by switching at least one of electrical connection and electrical setting; a state determining unit configured to, when each of the plurality of circuit states is set as the circuit state of the machining power supply, determine whether or not the set circuit state is normal; a failure portion specifying unit configured to specify a failure portion of the machining power supply based on a determination result with respect to each of the plurality of circuit states obtained by the state determining unit; and a reporting unit (a display unit or the like) configured to report the failure portion specified by the failure portion specifying unit to an operator.

In wire-electrical discharge machine and a numerical control apparatus thereof and a numerical control apparatus for controlling a machine tool, optional minute blocks are automatically created in front of and behind a connecting point, i.e., a joint of a block to which an offset command is instructed, and an offset value is exchanged between the minute blocks so that a correct offset value is set in a desired block.

In wire-electrical discharge machine and a numerical control apparatus thereof and a numerical control apparatus for controlling a machine tool, optional minute blocks are automatically created in front of and behind a connecting point, i.e., a joint of a block to which an offset command is instructed, and an offset value is exchanged between the minute blocks so that a correct offset value is set in a desired block.

Provided is a machining time prediction device including a predicted machining speed table where predicted machining speeds are registered in association with shape groups used for classification based on a shape of a machining path, a machining path generation unit generating machining path data including the machining path based on the program, a shape group determination unit determining which shape groups partial machining paths belong to, a path length addition unit adding and summarizing path lengths of the partial machining paths for the respective shape groups, a predicted machining time calculation unit calculating predicted machining times of the respective shape groups on the basis of a predicted machining speed table and the path lengths of the respective shape groups, a predicted machining time summation unit calculating a predicted machining time of the machining path by adding the predicted machining times of the respective shape groups, and a display unit displaying the predicted machining time of the machining path.

A wire electric discharge machining system according to the present invention includes: a wire electric discharge machine that relatively moves a wire electrode and a workpiece to be machined according to a program, and subjects the workpiece to be machined to electric discharge machining by the wire electrode; at least one hand; a robot which mounts the hand on a head of an arm, and operates an object to be operated; and a visual sensor that detects a position of a machined workpiece in a machining tank, which has been cut from the workpiece to be machined by the electric discharge machining, wherein the robot performs an operation of removing the machined workpiece from the machining tank, based on the position of the machined workpiece, which has been detected by the visual sensor.