A rotary table apparatus includes a rotary table body, a table rotor supported on the rotary table body and configured to be rotatable, a driving unit for driving the table rotor, a seal mechanism including a sealer disposed between the rotary table body and the table rotor, and a first supply unit configured to supply clean fluid for use in machining to the seal mechanism.

Electrode for an electro-erosion process, includes a shaft, a body coupled to the shaft, a plurality of machining-inserts, an insulated layer, and a flushing cover disposed on the body and coupled to the shaft. The shaft includes a channel, a plurality of first openings and second openings, where each opening is connected to the channel. The body includes a plurality of main-flushing channels, where each channel is connected to a corresponding first opening. The plurality of machining-inserts is spaced apart from each other along a circumferential direction and detachably coupled to a peripheral end portion of the body. Each machining-insert includes at least one third opening connected to a corresponding main-flushing channel. The insulated layer is disposed on top and bottom surfaces of the body. The flushing cover includes a plurality of side-flushing channels and a plurality of fourth openings, where each channel is connected to a corresponding second opening.

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.

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.

A filter outer cylinder container is a hollow container, and a filter medium is mounted in the container. Fluid passage holes, opened in a side surface member of the filter outer cylinder container, are located at or above a fixed height from a bottom portion of the filter outer cylinder container, whereby a machining liquid is stored in the filter outer cylinder container, so that the filter medium can be always submerged in the machining liquid.

A filter outer cylinder container is a hollow container, and a filter medium is mounted in the container. Fluid passage holes, opened in a side surface member of the filter outer cylinder container, are located at or above a fixed height from a bottom portion of the filter outer cylinder container, whereby a machining liquid is stored in the filter outer cylinder container, so that the filter medium can be always submerged in the machining liquid.

A wire-cut EDM machine in which the position of the liquid level of machining fluid is adjusted at the time of automatic wire threading includes a shape information acquisition unit for acquiring information on the shape of an object to be machined, a wire-threading position information acquisition unit for acquiring information on a wire-threading position of a wire electrode based on relative positions of upper and lower wire guides, and a liquid level position adjustment unit for acquiring the height of the object to be machined in the vicinity of the wire-threading position based on the information on the shape of the object to be machined and adjusting the position of the liquid level of the machining fluid at the time of automatic wire threading.

A wire-cut EDM machine in which the position of the liquid level of machining fluid is adjusted at the time of automatic wire threading includes a shape information acquisition unit for acquiring information on the shape of an object to be machined, a wire-threading position information acquisition unit for acquiring information on a wire-threading position of a wire electrode based on relative positions of upper and lower wire guides, and a liquid level position adjustment unit for acquiring the height of the object to be machined in the vicinity of the wire-threading position based on the information on the shape of the object to be machined and adjusting the position of the liquid level of the machining fluid at the time of automatic wire threading.

A wire electrode storage device for a wire electrical discharge machine is provided with a used wire electrode storage box configured to recover a used wire electrode and a dielectric fluid suction unit into which a fluid is poured to produce a negative pressure based on a Venturi effect so that a dielectric fluid accumulated in the storage box can be drawn in through an outlet of the storage box.

A wire electric discharge machine includes a mechanism for adjusting the level of a machining fluid in a machining tank. This mechanism includes a machining fluid intake opening provided in the machining tank so as to be vertically movable, an exhaust valve for adjusting an exhaust amount of the machining fluid taken from the machining fluid intake opening, and a machining fluid outlet portion that guides the machining fluid taken from the machining fluid intake opening to the exhaust valve. The mechanism controls such that the level of the machining fluid in the machining tank becomes uniform by adjusting the exhaust valve.