The tracking of a steel belt is affected by non-uniform temperature distribution across the width of the steel belt, non-uniform product loading, operator errors and misalignments. If the steel belt is not tracking properly, an Electro Mechanical Belt Control will adjust the position of the drive pulley as required to make the belt track properly.
This device is normally installed on the drive end of the conveyor. If the edge of the steel belt moves beyond a desired point, an edge sensor sends a signal to a PLC in the control panel. The PLC uses preset logic that tells an electrically driven jack screw how far to move one of the drive pulley bearings. The movement of the bearing increases or decreases the tension on one side of the belt. A steel belt always tracks to the side with the lowest tension so moving the bearing in the proper direction forces the belt to track back to the center of the drive pulley.