Adopting ac servo motor as the driving device, can the dc servo motor and a high precision, high performance as the half closed loop or closed loop control system.

采用交流伺服电机作为驱动器件，可以和直流伺服电机一样构成高精度，高性能的半闭环或闭环控制系统。

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Adopting ac servo motor as a drive device, can and dc servo motor as a high precision, high performance and a half closed loop or closed loop control system.

采用交流伺服电机作为驱动器件，可以和直流伺服电机一样构成高精度，高性能的半闭环或闭环控制系统。

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A master slave mode of CNC system with a half closed loop control in the numerical control transformation of a machine tool was designed and implemented.

介绍了一个半闭环主从式数控系统在普通机床数控化改造中的设计及实现。

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