The two sensors are respectively fixed secured on both sides of the rolled material. When the passing rolled material deflects, the amount of deflection will be equally divided by two for web guiding of each edge. The DC servo motors drives the web guiding device so that the rolled material is aligned to the center line all the time. The maximum deflection of the rolled material depends on the detection area covered by the sensors. For LIKE Web Guiding Control Systems, the maximum detection travel of the sensors is 23mm, an unrivaled detection coverage among its commercially available peers.