Device for displaying markings

A marker (15, 16) display device associated to the physical magnitudes linked to each other, and relative to the operation of a plurality of devices cooperating as an assembly, characterised in that the display device comprises a controller device in electrical communication with at least a first measuring device, a second measuring device to continuously register the values of a first physical magnitude, a second physical magnitude, originating in the first measuring device and second measuring device;

• and a third referencing device adapted to provide a reference value relative to the mathematical relationship between the first and second physical magnitude;
• the controller device being in electrical communication with a first indicator (13), a second indicator (14) to generate and transmit positioning signals to the first and a second indicator (13, 14), respectively, to indicate markers (15, 16) belonging to the first graduated scale (11) and the second graduated scale (12) such that the first and a second indicator (13, 14) are aligned during normal operation of the elements of the assembly.