人们不得不采用数字逻辑电路“搭”成一台机床专用计算机实作为数控系统，被成为硬件连接数控，简称未数控(NC)。

People have to use the digital logic circuit "build" into a special computer numerical control machine tool real as a system, the hardware connecting numerical control, or not numerical control (NC).

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实践证明，在应用PLC进行技术改造后，该控制系统的硬件电路得到了简化，工作更加可靠，提高了机床工作效率。

Practice has proved that the hardware circuit of this control system has been simplified, the work is more valuable, and the working efficiency is so improved after PLC technological transformation.

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机床电力拖动系统采用集成电路实现脉宽调制方式调速用IGBT管驱动电动机。

This article presents the application of IGBT-PWM regulating speed system in machine tool's electric drive.

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