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众所周知,逐点比较法每计算一次只有一个座标进给,不能两个座标同时进给,因此加工一条曲线或一条非平行于座标轴的直线时,阶梯现象很明显,我们想到,如果我们改为x座标与y座标同时进给一步,则在插补计算与座标轴成45°斜线时,则进给方向与45°斜线完全一致,它的平面误差为零。因此我们想到如果对逐点比较法进行改进,即每计算一次,不仅能单独进给x座标或y座标,还能x座标y座标同时进给,即有三种进给方式,并能在这三种进给方式中选取误差最小的方向进给。
As we all know, the point-by-point comparison of the calculation of each time there is only one coordinate feed, can not feed both coordinates, so the processing of a curve or a non-parallel to the axis of the straight line, the ladder phenomenon is obvious, we think that if We changed to x coordinate and y coordinate while feeding one step, then interpolation calculation and coordinate axis into 45 ° oblique line, then the feed direction and 45 ° oblique line exactly, its plane error is zero. Therefore, we think that if we improve the point-by-point comparison method, that is, for each calculation, not only the x coordinate or y coordinate, but also the x coordinate and y coordinate can be fed at the same time. There are three feeding modes In the three feeding methods can choose the smallest error in the direction of feed.