基于PLC的双轴伺服随动绘图系统

针对机电一体化实验教学,开发了一种双轴伺服随动绘图系统。该系统跟踪一个可变转速的转盘,通过x-y伺服运动机构控制画笔并在转盘上绘制图形。控制部分由模块化PLC实现,配置了CPU模块、定位模块,数字量输入/输出模块、模拟量输出模块、高速计数模块、人机界面模块。开发了含有转盘位置跟踪、轨迹插补及坐标变换算法的PLC控制程序,可实现高速随动绘图功能。基于PLC的双轴伺服随动绘图系统综合运用了机电控制类各课程的基础理论和工程知识,使学生掌握复杂运动控制系统的设计与实现方法,满足相关课程实验教学和工程创新能力培养的需求。

Double axis servo drawing system based on PLC

In view of the experiment teaching of mechatronics, a double axis servo drawing system is developed. The system tracks a rotating disc with variable speed, controls the brush through X-Y servo mechanism and draws a graph on the rotating disc. The control part is realized by modular PLC(programmable logic controller), which is equipped with CPU (central processing unit) module, positioning module, digital input/output module, analog output module, high-speed counting module and man-machine interface module. A PLC control program with the algorithm of turntable position tracking, trajectory interpolation and coordinate transformation is developed, which can realize the function of high-speed follow-up drawing. The double axis servo drawing system based on PLC integrates the basic theory and engineering knowledge of electromechanical control courses so that students can master the design and implementation method of complex motion control system, which meets the needs of experimental teaching and engineering innovation ability training of related courses.