A method of manufacturing a jointed device of a medical instrument includes providing a machining fixture on a wire electrical discharge machine having an electrical discharge wire. The fixture includes member holes each adapted to accommodate at least one workpiece, the workpiece being adapted to form a portion of the jointed device of the medical instrument. At least two workpieces each include a first workpiece and a second workpiece, accommodated within at least two member holes of the member holes. The fixture is associated with the wire electrical discharge machine so that the electrical discharge wire can cut at most one workpiece at a time. The machining fixture is rotated around a fixture rotation axis at a predetermined angle, which is chosen to provide that the electrical discharge wire can cut only one workpiece at a time. The workpieces are cut by the electrical discharge wire.

A device for the electrochemical processing of a metal workpiece, including a plurality of electrodes that by way of respective linear drive units are movable in a linear manner relative to the workpiece from an initial position to a terminal position, the electrodes having a reproduction face that is directed toward the workpiece, wherein at least three electrodes are provided, the electrodes being disposed so as to be offset around the circumference of the workpiece and by way of the reproduction faces of the electrodes during the entire readjustment movement from the initial position to the terminal position engaging across one another in portions so as to be in contact, and by way of the reproduction faces of the electrodes delimiting a fluid duct that in a closed manner encircles the circumference of the workpiece.

A wire electrical discharge machine includes: a wire electrode cumulative moving time calculator for calculating a value correlated to a wire electrode cumulative moving time as a cumulative value of time for which a wire electrode has moved in each of multiple wire electrode moving regions which are defined by dividing a movable range of the wire electrode moving relative to a worktable; and a display control unit for displaying on a display unit the information on values correlated to the wire electrode cumulative moving time for respective wire electrode moving regions.

A method of manufacturing a jointed device of a medical instrument includes providing a machining fixture on a wire electrical discharge machine having an electrical discharge wire. The fixture includes member holes each adapted to accommodate at least one workpiece, the workpiece being adapted to form a portion of the jointed device of the medical instrument. At least two workpieces each include a first workpiece and a second workpiece, accommodated within at least two member holes of the member holes. The fixture is associated with the wire electrical discharge machine so that the electrical discharge wire can cut at most one workpiece at a time. The machining fixture is rotated around a fixture rotation axis at a predetermined angle, which is chosen to provide that the electrical discharge wire can cut only one workpiece at a time. The workpieces are cut by the electrical discharge wire.

A device .[.(340, 440, 540).]. is connected to an output terminal of a controller.[.(330).]., having a single input terminal connected to a first power terminal of an external power source .[.(305).]. which outputs an AC voltage between the first power terminal and a second power terminal. The device includes a bleeding circuit.[.(342, 442, 542).]., and a switching arrangement .[.(344/346, 444/446, 544/546).]. to detect whether the controller powers a load .[.(320.]. or disables the load. When the controller is in an OFF state, the switching arrangement connects the bleeding circuit between the output terminal of the controller and the second power terminal to provide a current path between the output terminal of the controller and the second power terminal. When the controller is in an ON state, the switching arrangement disconnects the bleeding circuit between the output terminal of the controller and the second power terminal.

A method of manufacturing a jointed device of a medical instrument includes providing a machining fixture on a wire electrical discharge machine having an electrical discharge wire. The fixture includes member holes each adapted to accommodate at least one workpiece, the workpiece being adapted to form a portion of the jointed device of the medical instrument. At least two workpieces each include a first workpiece and a second workpiece, accommodated within at least two member holes of the member holes. The fixture is associated with the wire electrical discharge machine so that the electrical discharge wire can cut at most one workpiece at a time. The machining fixture is rotated around a fixture rotation axis at a predetermined angle, which is chosen to provide that the electrical discharge wire can cut only one workpiece at a time. The workpieces are cut by the electrical discharge wire.

A machining program creation apparatus for a wire electrical discharge machine for creating a machining program for cutting a predetermined machining shape in an object to be machined includes a first unit defining the machining shape; a second unit defining a shape of the object to be machined; a third unit designating a reference position to be used when the machining shape is machined; a fourth unit for generating a first machining path for cutting the machining shape based on the machining shape, the shape of the object to be machined, and the machining reference position; a fifth unit for generating the shape of the object to be machined as a second machining path based on the shape of the object to be machined and the machining reference position; and a sixth unit for drawing the first and the second machining paths on the same screen.

A wire electrical discharge machine machines a workpiece so as to have different machined shapes on a top surface and a bottom surface of the workpiece. The wire electrical discharge machine includes: a distance measuring sensor for moving within a machining area of the wire electrical discharge machine and measuring a distance between the distance measuring sensor and an object to be measured; and a vertical position calculating unit for calculating a distance between a reference surface and the top surface and a distance between the reference surface and the bottom surface, from a distance between the reference surface and the distance measuring sensor, a distance between the top surface and the distance measuring sensor, and a distance between the bottom surface and the distance measuring sensor, measured by the distance measuring sensor.

A wire electric discharge machine, configured to determine whether or not electrical discharge machining of a workpiece can be performed, includes a determination unit for determining that wire electrical discharge machining of the workpiece can be performed when a wire electrode is moved toward the workpiece and a contact detection unit detects contact, and for determining that the wire electrical discharge machining of the workpiece cannot be performed when a breaking detection unit detects the breaking of the wire electrode before the contact detection unit detects the contact.

A measurement program for sequentially measuring measurement points, which are to be measured with a touch sensor, is created on the basis of a machining program, which is read in, for machining a turning tool. Then, the rake face height is measured on each of the measurement points and the measurement data is stored. Subsequently, a calculation method of a correction amount is selected so as to calculate the correction amount, and whether or not the calculated correction amount is smaller than a regulation value is determined. The machining program is modified on the basis of the correction amount when the correction amount is not smaller than the regulation value, while the machining program is modified on the basis of the correction amount in accordance with the selected method when the correction amount is smaller than the regulation value.