| 摘要 |
PURPOSE:To perform fast cutting with high accuracy, by controlling an approximate route found for almost the same part of a travel route based on a pre-read NC command by the corrective instruction of an auxiliary route on which only an error due to the delay element of an NC control system is added when the route is moved. CONSTITUTION:When a circle shown in broken line is cut, the pre-read of a large number of blocks of the NC command are performed, and the approximate routes of almost the same part of the travel route are found, and the reduced quantity of a radius is estimated, and an moving instruction with a large radius is issued. In such a case, a correction quantity DELTAM in which the radius size of the approximate route after the reduction of the radius is set so as to be a commanded radius is found from a prescribed equation. In such a way, the NC command having a quantity larger by the correction quantity DELTAM is issued, and actual motion is controlled so as to picture the circle as shown in the broken line. Actually, since a micro difference due to an acceleration/deceleration pattern, speed, and a working radius, is generated, and appropriate correction coefficient is mutliplied.
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