CNC系统中提高回原位精度的实现

提高回原位精度是计算机数值控制ＣＮＣ系统开发中的关键技术问题之一，本文在指出了以往回原位算法的缺陷并分析了引起数控系统回原位误差因素的基础上，提出了引入回原位国界参数和最终逼近原位方向参数，从而提高数控系统回原位精度的算法，并提出了在闭环或半闭环数控系统中利用检索脉冲输入从而消除原位开关激活边界位置误差的思想，提出了适用于闭环或半闭环数系统的全新的高精度的回原位算法。

Implementation of High Accurate Homing in CNC Systems

To improve the accuracy of homing is one of the complicated key problems in computer numerical control system development.On the basis of pointing out the defect of former homing algorithm and analysing the causes which produce homing errors in numerical control systems,this paper presents a new algorithm,which introduces two concepts:the edge of homing; the last direction of homing approach to improve the accuracy of homing.The authers advance a method which uses index pulse input to perish the affect of the active edge position error of the homing sensor,obtaining a high accurate algorithm suitable for close loop or semi close loop numerical control systems.