| 摘要 |
<p>A method of evaluating an accuracy in which an operating accuracy of a machine can be easily evaluated on the side of a numerically controlled system without using a special measuring device. For example, during execution of a circular arc processing program (14a) for evaluating an accuracy by the processor (11) of a numerically controlled system (10) with numerically controlled machine (30) idly operated, machine operating positions in directions of an X-axis and a Y-axis are periodically measured in response to position feedback signals output from pulse coders provided on servo motors of the X-axis and the Y-axis of a machine tool, and stored in a memory (13). Upon completion of the execution of the program, a radius of an operating path and an error with respect to a specified radius on the X-Y plane of the machine tool are calculated by the processor based on the measured positions in the directions of the X-axis and the Y-axis. The machine operating path is displayed on the display unit (16a) together with the specified path and allowable external and internal paths for the accuracy evaluation by the operator in accordance with image signals produced by a graphic control circuit (16) based on the calculated path or the calculated radius error, the radius specified by the program and allowable upper and lower limit radii.</p> |
