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Electroimpact has developed a second generation of mobile robots with several improvements over the first generation. The frame has been revised from a welded steel tube to a welded steel plate structure, making the dynamic response of the structure stiffer and reducing load deflections while maintaining the same weight. The deflections of the frame have been optimized to simplify position compensation. The caster mechanism is very compact, offers greater mounting flexibility, and improved maneuverability. The mechanism uses a pneumatic airbag for both lifting and suspension. The robot sled has been improved to offer greater rigidity for the same weight, and dual secondary feedback scales on the vertical axis further improve the rigidity of the overall system. Maintenance access has been improved by rerouting the cable and hose trays, and lowering the electrical cabinet.

The versatility of the accurate robot has been increased by coupling it with a mobile platform with vertical axis. The automation can be presented to fixed aircraft components such as wings, fuselage sections, flaps, or other aircraft assemblies requiring accurate drilling, inspection, and fastening. The platform accommodates a tool changer, ride along coupon stand, fastener feed system, and other systems critical for quality automated aircraft assembly. The accurate robot's flexibility is increased by a floor resynchronization system. The indexing system is replaced by an automated two-camera onboard vision system and miniature targets embedded in the factory floor, with accuracy comparable to cup and cone alternatives. The accurate robot can be deployed by casters, curvilinear rail, or air bearings.