Abstract: A vertical calibration method for a wire cut electric discharge machine includes selecting a known altitude for a reference point, marking down four different positions of the upper wire guide of the wire cut electric discharge machine at three different altitudes and reptitively moving the wire of the wire cut electric discharge machine being in contact with the reference point, measuring four different displacements of the upper wire guide when being in contact with the reference point, establishing an equation by using a principle of trianglation, and completing calculation of positions of the upper wire guide and the lower wire guide to finish calibration.

Abstract: A vertical calibration method for a wire cut electric discharge machine includes selecting a known altitude for a reference point, marking down four different positions of the upper wire guide of the wire cut electric discharge machine at three different altitudes and repetitively moving the wire of the wire cut electric discharge machine being contact with the reference point, measuring four different displacements of the upper wire guide when being contact with the reference point, establishing an equation by using a principle of triangle, and completing calculation of positions of the upper wire guide and the lower wire guide to finish calibration.

Abstract: A wire cutting discharging machining device and the method thereof are disclosed. The method includes the steps of feeding a wire to be machined to a plurality of guide blocks; detecting one end of the wire and positioning the end; driving the plurality of guide blocks and a parallel device which is connected to the plurality of guide blocks and is operated synchronously so as to vertically guide the wire to an upper guide; and feeding the wire continuously to a workpiece, and a lower guide to a drawing roller. When in the process of machining, if a wire is broken abruptly or a machining path is to be updated, then a wire end detecting device, a wire cutting means, a wire end clamping device and a wire pressing device are used to achieve the object of wire modification.

Abstract: A method for solving the problem that the machining accuracy in a corner part or in a circular arc is reduced by the line flexure during the wire-cut electric discharge machining. In the method, the controller of the wire-cut electric discharge machine with a built-in function of measuring error of wire flexure, after the machining, a detection voltage of the machine detects the machined groove. If the wire electrode comes into contact with the workpiece, the short-circuit caused by the wire flexure in the corner part or in a circular arc is detected, and then the compensation value of the wire flexure is gradually changed to continue the groove detection until the wire electrode and the workpiece are not short-circuited and the groove detection stops. Then the wire flexure value in the corner part or in the circular arc is obtained to establish the machining parameter data of the machine to automatically compensate the wire flexure value in the following machining.

Abstract: An apparatus and method is provided for generating an electric discharge in an alternating direction on a workpiece for line cutting of the workpiece. In particular, the apparatus and method allows the benefits of preventing the workpiece from being cut apart due to excessive power and also preventing electrolysis that can degrade the surface quality of the workpiece. The apparatus includes a negative ignition voltage source, a positive ignition voltages source, a discharging voltage source, and a pulse generator, which are constructed on an all-transistor architecture.