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光栅检测位移量的伺服控制系统已广泛应用在高精度数控车床中.而加工自行车曲柄的工艺特点是,数量大、精度低、工序简单、切削量小,如果使用高精度数控车床是资源的浪费.现在大多采用的是步进电机驱动丝杠+单片机的开环控制系统,由于这类系统有着易“丢步”的自身缺陷,易造成加工产品质量不稳定.为此,笔者研制出准16位单片机+光栅尺(普通精度)的,“准”二维的专用车床伺服控制系统.一、系统组成系统由四大部分组成(见图1),它们分别是中央控制处理器(单片机)、位移检测电路(x、z方向位移量检测),执行器(x、z方向伺服电机驱动电路)、人机对话接口(键盘、显示器).
The grating control of displacement detection servo control system has been widely used in high-precision CNC lathe processing bicycle crank is characterized by a large number, low precision, simple process, cutting a small amount, if the use of high-precision CNC lathe is a waste of resources Nowadays most of them adopt the open-loop control system of stepping motor driven screw + single-chip microcomputer.As a result of such system has its own defects of “losing step” easily lead to instability of processing product quality, Bit microcomputer + grating ruler (ordinary precision), “quasi” two-dimensional dedicated lathe servo control system. A system composed of four major components (see Figure 1), they are the central control processor Displacement detection circuit (x, z direction displacement detection), the actuator (x, z direction servo motor drive circuit), man-machine dialogue interface (keyboard, display).