Operating principle: the “ROBOTRONIC” gantry has been specifically designed for the fully automatic handling of the piece-holder baskets in the different treatment phases. The system consists of a motorized unit that moves on two axes: horizontal and vertical. During the horizontal movement it carries out the sequential movement of the baskets, while during the vertical movements it introduces and removes the baskets from various tank positions. Runways manufactured of highest materials quality and reliability over time, intended for pick-and-place handling. They consist of extruded bars with special profiles and hardened by oxidation to resistance over time. The carriage and the vertical bar slide within very high precision guides consisting of supports with inclined rollers with five-year lubrication.