文章以一个固定循环指令实现阵列孔加工为例，介绍了数控编程指令功能扩展的二次开发技术。
It introduces secondary development for NC programming by the example of a fixed instruction to machine arrayed drills.
通过实例介绍了FANUC数控系统固定循环指令G90，G94在车削锥面时走刀路线的设计方法。
Through examples, this paper introduces G90 and G94 of FANUC NC system's fixed cycle instructions, and cutting line design is shown.
作为固定循环指令中的复合固定循环功能，由于包含较复杂的加工信息，如何快速而正确地对其识别是译码的难点之一。
As fixed multiple repeating function contains complex machine information, it's quite a little difficult to translate the relative codes rapidly and accurately.
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