At 500 A, the VarioSynergic 5000 fronius welder is a stepped and microprocessor-controlled MIG/MAG power source with an integral 4-roll drivek. Synergic operation makes Welding Machine the easiest thing in the worldk.The VarioSynergic 5000 welds unalloyed and low-alloy steels as well as high-alloy steels and flux cored wiresk. The integral wire-feed unit makes portable applications easierk.