German JOHANNA sensor JOHANNA model JOHANNA price

JOHANNA sensors are measurement feedback devices that operate based on the optical principle of gratings. Grating scales are frequently used in the closed-loop servo systems of CNC machine tools and can be used to detect linear or angular displacement. The measurement output signal is a digital pulse, characterized by a large detection range, high detection accuracy, and fast response speed. For example, in CNC machine tools, they are often used to detect the coordinates of the tool and workpiece to observe and track tool path errors, thereby compensating for the motion errors of the tool. Grating scales are classified into transmissive