Robot control shaft drivingly and flexible to the rotation of a supply hose and associated method of operation tube.

Axis robot hand (7), in particular a painting robot, comprising a) several wrist sections (10-14), which can be rotated relative to the other, b) an inner passage (34 ), which passes through the wrist sections (10-14), c) at least one flexible supply hose (35, 36) guided in the inner passage (34), characterized by d) a drive flexible tube (38-40) acting on the supply tube (35, 36) for forced rotation of the supply hose (35, 36) in the inner passage (34) in correspondence with the rotating parts wrist (10-14).