为克服传统数控雕刻机加工复杂二次曲线时用大量直线或圆弧拟合所导致的拟合误差,研究设计了基于PC+PCI-1750控制卡的开放式三维雕刻机数控系统,开发了能直接进行直线、圆弧、椭圆、抛物线、双曲线插补的差分插补控制程序,并用MasterCAM和差分插补理论研究开发了汉字、复杂三维图形的三维数控雕刻机控制系统,使得加工任意二次曲线、汉字和复杂三维图形的插补程序简捷统一,加工二次曲线的程序段极大减少,有利于提高加工质量,试验加工效果很好.%In order to overcome the fitting error of the traditional CNC engraving machining complex quadratic curve with a large number of linear or circular arc ,designed an open 3D engraving machine CNC system based on PC + PCI - 1750 control card, developed a difference interpolation control program can interpolate linear, arc, elliptical, parabolic and hyperbolic directly, and developed 3D carving machine control system of Chinese characters, complex 3D graphics with MasterCAM and difference interpolation theory, made the interpolation procedures simple and unified when processing any quadratic curve, Chinese characters, and complex 3D graphics, the procedures section processing quadratic curve reduced significantly, helpful to improve processing quality, the experimental results very well.
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