A conveyor system comprising: a conveyor belt comprising a conveying surface, wherein the conveyor belt is adapted to convey material (102, 104) 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 (102, 104) 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.