The arithmetic of linear interpolation is analysed, the interpolation flow chart and part of the VB program codes are provided, and the simulation example is presented.
分析了全象限逐点比较法直线插补的算法，给出了插补流程图，并提供了部分VB程序代码，并给出了仿真实例。
The corresponding some basic formulas and the interpolation arithmetic are given in this paper.
给出了相应的基本公式和插补算法。
The interpolation arithmetic will effectively improve the efficiency and precision in the special spiral rod machining, and it provide a new method of the special spiral rod machining.
本文提出的插补算法将有效地提高异形螺杆加工的精度和效率，为异形螺杆的加工另辟新径。
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