I-Power manipulator on a motorized base for polygonal tapered towers SAW. Height adjustable, non-retractable boom. The motorized carriage moves along the boom a 1200 mm. stroke vertical diving slide, the carriage and the vertical slide deliver x/y axis of the IG tactile joint tracking system. The power source, the flux feed (with heating resistances) and the electrical recovery systems are located on the base. The tower shells are laid on an OBY15 rotator to perform from 2 to 4 longitudinal welds and to prefabricate half towers assembled later-on to finish the job. OBY15 idle section height can be adjusted to keep the joints parallel to the floor level.