A conveyor system comprising: a conveyor belt comprising a conveying surface , wherein the conveyor belt is adapted to convey material on the conveying surface ; and a separator system comprising a separator below the conveying surface , wherein the separator is configured to apply a separating force onto the material on the conveyor belt such that at least one piece of the material is lifted off of the conveying surface , wherein: the separator comprises a plurality of electromagnets and the separating force is a magnetic field applied by each of the plurality of electromagnets (120A-H), and the conveyor system further comprises: a sensor upstream from the separator ; and a controller communicatively connected to the sensor and the separator , wherein the sensor is adapted to detect at least one piece of material of the material on the conveyor belt , characterized in that the controller is adapted to classify the detected piece of material into a predefined classification, and wherein the controller is adapted to selectively control the separating force from at least one of the electromagnets (120A-H) of the separator based on the classification of the detected piece of material. a conveyor belt comprising a conveying surface , wherein the conveyor belt is adapted to convey material on the conveying surface ; and a separator system comprising a separator below the conveying surface , wherein the separator is configured to apply a separating force onto the material on the conveyor belt such that at least one piece of the material is lifted off of the conveying surface , wherein: the separator comprises a plurality of electromagnets and the separating force is a magnetic field applied by each of the plurality of electromagnets (120A-H), and the conveyor system further comprises: a sensor upstream from the separator ; and a controller communicatively connected to the sensor and the separator , wherein the sensor is adapted to detect at least one piece of material of the material on the conveyor belt , characterized in that the controller is adapted to classify the detected piece of material into a predefined classification, and wherein the controller is adapted to selectively control the separating force from at least one of the electromagnets (120A-H) of the separator based on the classification of the detected piece of material. the separator comprises a plurality of electromagnets and the separating force is a magnetic field applied by each of the plurality of electromagnets (120A-H), and the conveyor system further comprises: a sensor upstream from the separator ; and a controller communicatively connected to the sensor and the separator , a sensor upstream from the separator ; and a controller communicatively connected to the sensor and the separator , wherein the sensor is adapted to detect at least one piece of material of the material on the conveyor belt , characterized in that the controller is adapted to classify the detected piece of material into a predefined classification, and wherein the controller is adapted to selectively control the separating force from at least one of the electromagnets (120A-H) of the separator based on the classification of the detected piece of material. <EOS>