Miller's Trailblazer engine-driven welder/generators, Nos. 275 and 325, feature technology that reduces fuel use by about 35 percent, increasing run times as much as 50 percent. Smart-Cor technology provides independent weld and generator power, ensuring no interaction between the welding arc and other tools. Welder/generators without this capability can cause fluctuations in the welding arc when a load is simultaneously applied to the generator. Auto-Speed technology automatically adjusts the engine speed to run at lower speeds determined by the load applied to the machine. Whereas other comparable welder/generators operate at 3,600 rpm at all times, the Trailblazer series varies its output based on demand.