Worldwide, the Viessmann Group relies on innovative production technologies . At their premises in Berlin, a new CLOOS robot system takes over welding and also the handling of the heating boilers. The positioner picks and clamps the boilers fully-automated to always position the complex workpieces perfectly for welding and loading/unloading. When welding is completed at one side, the positioner turns the boiler fully-automated to weld the other side. The new system is able to process different types of boilers flexibly. As the boilers are turned fully-automated in the system itself and the workpieces tolerances are compensated directly during welding, the set-up and cycle times and thus the production costs reduce considerably.