Apparatus for operating and controlling machines cleaning thin metal or metal coated sheets and boards

An operating and control apparatus for board-cleaning machines of the type comprising at least one horizontal cylindrical brush (17) as well as means (19) for feeding the boards (14) to be cleaned, characterised in that it comprises a reading member (1) capable of detecting the presence of the incoming board (14), a device (3) designed to control the forward movements of the board (14), a memory for storing the dimension (A) of the board (14) which is parallel to the direction of the movement of the latter, a motor unit (7) for driving said at least one brush (17) in the same direction as the feeding direction of the board (14), as well as a processor (5) designed to collect and process the signals output from the said member (1) and device (3) and to compare them with the data stored in the said memory so as to operate, by means of a special power unit (6), the said motor unit (7), so that it causes said at least one brush (17) to rotate, when the latter is engaged with the rear end part of the board, at a velocity having absolute values greater than or equal to zero and in the opposite direction to the direction in which the board (14) is fed, in accordance with a predetermined method of operation.