利用可编程序控制器脉冲输出指令控制步进电机的转速、方向和移动距离，从而实现精确定位。
PLC used Pulse Output Function to control the stepper motor speed, direction and distance of movement, accordingly realizing the purpose of exact orientation.
通过使用可编程控制器中的专用脉冲输出指令和高速计数器，实现了对辐照仪步进电机的精确控制。
The accuracy control of the motors in Gamma-ray irradiation of blood is realized by means of the inner pulse output code and the high-speed counter in PLC.
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