This paper deals with the theoretic design process, methods and procedures of machine tools' step speed drive system.
阐述了机床有级变速传动系统的理论设计过程与设计方法，简要介绍了其设计步骤。
The control principle of step motor is exposed, drive control of feed system is carried out by use of motion controller, meanwhile, dot motion control of step motor is also carried out by use of PLC.
阐述了步进电机控制原理，利用运动控制器实现了进给系统的联动控制，利用PLC实现了步进电机的点动控制。
The overall architecture of the system consisted of code interpreter, modeling module, feature database of turning based on STEP-NC and simulation drive is established.
讨论了仿真系统的译码器、基于特征的加工数据库、实体建模以及仿真驱动等组成模块实现的关键技术和方法。
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