一个完整的数控进给系统包括指令输入、编释、信息处理、功率驱动及伺服进给系统。在自动控制理论中,对闭环伺服系统进行了深入的研究,但是,随着微电子技术应用的普及,用微型计算机控制机床,特别是设计制造的各种经济型的数控车床日益增多;另外,许多单位用微机改造旧机床时, A complete CNC infeed system includes command input, compilation, information processing, power drive and servo infeed. In the automatic control theory, the closed-loop servo system has been studied thoroughly. However, with the popularization of the application of microelectronic technology, the control of the machine tool by the microcomputer, especially the economical CNC lathes designed and manufactured, is increasing. In addition, Many units use the computer to transform the old machine,