Agricultural machine with a conveyor and a foreign object detector

It is an agricultural machine, in particular field chopper or the like, with a conveyor for conveying the harvested material and with a foreign body detector, in particular metal detector for detecting foreign body information of a foreign body, in particular metal element in the crop and of the superimposed interference information, wherein the foreign body detector comprises at least one compensating unit for comprises at least partially compensating for the interference information with the aid of compensation information being provided for storing compensation information comprises at least a compensating memory, wherein a speed sensor is provided for detecting the conveying speed and / or speed of the conveying mechanism, proposed / which ensures a higher reliability, in particular also at a change of the conveying speed and / or rotational speed or at a positive or negative acceleration of the conveying mechanism. This is inventively achieved in that the compensation memory is a memory for storing speed compensation information with an associated conveyor speed and / or speed of the conveying mechanism.