Control device, calculation device, and control method

A calculation device comprising:

• a dimension acquisition unit configured to acquire a measured dimension of a test workpiece that has been machined with a wire electrode inclined at a given angle with respect to a running direction of the wire electrode;
• a first computation unit configured to calculate, based on the measured dimension, first actual information indicating an actual holding position of the wire electrode at which the wire electrode is actually held at a first die guide configured to guide the wire electrode to a workpiece;
• a second computation unit configured to calculate, based on the measured dimension, second actual information indicating an actual holding position of the wire electrode at which the wire electrode is actually held at a second die guide configured to guide the wire electrode sent from the workpiece;
• and
• an output unit configured to output the first actual information and the second actual information to a control device of a wire electrical discharge machine that has machined the test workpiece.

A control method for controlling a wire electrical discharge machine that machines a workpiece by causing electrical discharge at an electrode gap between the workpiece and a wire electrode that runs along a given running direction, the control method comprising:

• a reading step of reading from a storage unit, first information indicating a holding position of the wire electrode at a first die guide configured to guide the wire electrode to the workpiece, and second information indicating a holding position of the wire electrode at a second die guide configured to guide the wire electrode sent from the workpiece;
• a movement control step of relatively moving, using the first information and the second information, at least one of the first die guide and the second die guide relative to a test workpiece being the workpiece so that the wire electrode inclines at a given angle with respect to the running direction;
• a dimension acquisition step of acquiring a measured dimension of the test workpiece that has been machined with the wire electrode inclined;
• a computation step of calculating, based on the measured dimension, first actual information indicating an actual holding position at which the wire electrode is actually held at the first die guide, and second actual information indicating an actual holding position at which the wire electrode is actually held at the second die guide;
• and
• a compensation step of rewriting the first information to the first actual information if the first information and the first actual information differ from each other, and rewriting the second information to the second actual information if the second information and the second actual information differ from each other.