Fagor open grating ruler is widely used in CNC machine tools, measuring instruments, automation equipment and other fields. In CNC machine tools, it is often used to detect the coordinates of the tool and the workpiece to observe and track the cutting tool error, and to compensate the cutting tool motion error. In measuring instruments, it can be used for high-precision displacement and dimensional measurements. In the automation equipment, it can be used with PLC, PC and other control equipment to achieve accurate displacement control of the automation mechanism.