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数控机床插补计算方法主要有逐点比较法、数字积分法、时间分割法及角度逼近法等,这些插补算法中,因逐点比较法算法简单而广泛应用于经济型数控系统。逐点比较法是以折线来逼近给定轨迹,只要将脉冲当量取得足够小,就可达到精度的要求。逐点比较插补法在脉冲当量为0.01mm,系统进给速度小于3000mm/min时,能很好地满足要求。但当脉冲当量为0.005～0.01mm,系统进给速度大于3000mm/min时,插补点急增,CPU大部分时间忙于
The main methods of NC machine tool interpolation are point-by-point comparison method, digital integration method, time segmentation method and angle approximation method. These interpolation algorithms are widely used in economic numerical control system because of the simple and direct comparison algorithm. Point by point comparison method is based on the broken line to approach a given trajectory, as long as the pulse equivalent is made small enough, you can achieve the accuracy requirements. Point by point comparison interpolation method in the pulse equivalent of 0.01mm, the system feed rate is less than 3000mm / min, can well meet the requirements. However, when the pulse equivalent of 0.005 ~ 0.01mm, the system feed rate is greater than 3000mm / min, the interpolation point increased sharply, CPU most of the time busy