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位置检测元件(装置)是数控机床的重要组成部分。它采用直接或间接的方法将数控机床的执行机构(如电动机、刀架等)或工作台等设备的速度和位移检测出来,并发出反馈信号,与数控系统发出的信号指令相比较,构成闭环(半闭环)系统,补偿执行机构的位置误差,从而提高数控机床加工精度。当执行机构的位置误差超过数控装置内参数所设定的允差值或检测元件出现故障时,会在显示器上发出报警信号。通常情况下,如果运动着的执行机构坐标轴实际位置与给定位置之差超过设定的允
Position detection element (device) is an important part of CNC machine tools. It uses direct or indirect methods to detect the speed and displacement of CNC machine tools’ actuators (such as motors, tool carriers, etc.) or workbenches, and sends out feedback signals, which are compared with the signals sent by CNC system to form a closed loop (Semi-closed loop) system to compensate the position error of the actuator so as to improve the machining accuracy of the CNC machine tool. When the position error of the actuator exceeds the tolerance set by the parameters in the numerical control unit or the detecting element is faulty, an alarm signal will be sent out on the display. Under normal circumstances, if the movement of the actuator axis position and the actual position of a given location difference exceeds the allowable