Working station for deposition of elementary semifinished products for building green tyres

A working station for deposition of elementary semifinished products for building green tyres, said working station comprising:

• at least one feeding apparatus for feeding an elementary semifinished product;
• a forming drum;
• an anthropomorphic robotized arm associated with said forming drum;
• a control apparatus configured for sending movement commands to said anthropomorphic robotized arm in order to move said forming drum in a working zone, said working zone being defined at an outlet area where said elementary semifinished product exits said feeding apparatus, said forming drum being moved in said working zone while said feeding apparatus is feeding said elementary semifinished product, so that said elementary semifinished product is laid on said forming drum in coils arranged side by side or at least partially overlapping each other for making at least one component of the green tyre of a given tyre model;
• and
• a calibration device for calibrating said anthropomorphic robotized arm, the calibration device comprising:
• a base plate,
• a support rotatably mounted on said base plate, and
• a reference element translatably mounted on said support, the reference element comprising a cursor and a tip;
• wherein the support is positionable in a plurality of first positions relative to the base plate and the reference element is positionable in a plurality of second positions relative to the support and is fixed into one position of the plurality of second positions by inserting at least one pin or screw into one slot of a plurality of slots on the cursor;
• and
• wherein said control apparatus is also configured for executing the following operations:
• determining target coordinates, associated with said at least one component of said green tyre, for said anthropomorphic robotized arm in order to move said forming drum in said working zone;
• retrieving from a memory area a correction function associated with said anthropomorphic robotized arm and said working zone;
• modifying said target coordinates by means of said correction function, thereby obtaining processed coordinates;
• using said processed coordinates for sending said movement commands.