激光焦点误差解析与实时合成补偿的新方法

Study on the Compensation Method of the Focus Location Error by Means of Resolution of Vector and Superimposition for Three Dimensional Laser Cutting

提出一种数控五轴激光切割机焦点位置的检测与误差补偿新方案 ,把电容传感器检测激光聚焦头光轴方向的焦点误差 ,矢量解析到x、y、z三个坐标轴上 ,构造同步双端口桥式存取系统 ,将误差补偿量实时动态地叠加在数控插补值上 ,合成输出位置指令 ,控制伺服单元同时完成数控插补和误差补偿。

Briefly commencing with the independent compensation method of focus location error for 2-dimensional laser cutting, the paper sets out to develop a new superimposing compensation for 3-D laser cutting. The focus location error which is detected by a capacity sensor in the optical head direction will be resolved to x, y and z axis, so that these quantities could be superimposed on the NC interpolation. Thereafter the servo drivers of the machine could simultaneously execute the interpolation and error compensation.