基于PMAC运动控制卡的数控试验台设计.doc

基于PMAC运动控制卡的数控试验台设计 [摘要]本论文课题的主要内容是设计一个利用工控机和运动控制器对X,Y，Z,A,B五个坐标进行控制，采用位移检测装置对数控装置执行件的位移进行检测的开放式数控技术试验台，本文采用“Pc机+可编程运动控制器”的方式来构造该数控试验工作台。本设计把PMAC运动控制卡及其扩展卡放入控制箱，通过上位机——工业控制机（IPc）标准串口通讯，再配上交流伺服电机和步进电机、伺服驱动器、编码器和直线光栅尺等，构成一个模块化的数控系统。在对试验平台机械结构进行设计的过程中，主要对滚珠丝杠螺母副、滚动直线导轨副和蜗轮蜗杆式转台进行了计算、校核和选用，确保了机械传动部件的精度和刚度，使之满足系统的要求；通过计算，选择了电气驱动部件，包括交流伺服电机和步进电机及其伺服驱动器、编码器和直线光栅尺。基于Ｗindoｗs操作系统，利用Visual Basic建立了控制软件界面，应用PMAC的Ｇ代码解释程序、M代码解释程序和Ｔ代码解释程序编写了试验台的运动程序，实现了工作台的加、减速等控制和直线、圆弧等动作。 [关键词]试验平台　运动控制卡　结构设计　软件设计  DESDINE THE MACHINE STRUCTURE OF THE NC TEST-BED BASED ON PMAC ee (ee) Tutor: ee Abstract: The important content of this thesis is using Motion Control Card and IPC for the controlling of the five directions X, Y, Z, A and B. It is an ONC test-bed which detects the displacement of numerical control by its displacement detecting device. It adopts the “IPC+PMAC” mode to establish the test-bed. This design puts PMAC Motion Control Card and its development card into the controlling case and communicates with IPC through serial—port. Then, it matches AC servo motors, step motors, servo drivers, encoder and grating rulers to form a modular NC system. In the process of the designing of the mechanical structure of this test-bed, the ball screw assembly, roll linear guide way assembly and worn gear pair turntable are firstly main devices to calculated, checked and attached, as it Can ensure the high precision and rigidity of the mechanical transformation devices, as well as fulfill the requirement of the NC system. Secondly, it selects electrical components through calculation, including AC servo motors, step motors, its servo drivers, and encoders and grating rulers. Thirdly, basing Oil Windows Operating System, it establishes the software interface by Visual Basic. The motion program of the test-bed which is applied to carry out the acceleration and deceleration control, as well as linear and circular movement of the test-bed, has been developed by G code explanation program, M code expl