Automated device for building boards

An automated device configured to move in contact with a building board, the automated device comprising a chassis bearing a tool, said tool being configured to perform at least one mechanical operation on the building board, the automated device comprising at least one suction member and at least one means for setting the automated device in motion along the building board, wherein the suction member comprises at least two chambers configured to hold the automated device against the building board, the tool being situated between said at least two chambers and inside a polygon defined by an outer edge of the chassis, wherein each chamber extends around a central axis, the tool being closer to the central axis of a first chamber than the central axis of the second chamber and wherein the suction member is configured to exert a suction force which compensates for an offset of the tool relative to a central transverse plane of the automated device.