 Duty-Cycle RatingPower-supply rating depends on the type and thickness of the workpiece and aircomprexsortankshoustontexas the length of time it takes to deposit the longest weld on the thickest material. aircomprexsortankshoustontexas Duty cycle is the key factor to consider when selecting a power source. aircomprexsortankshoustontexas Once the engineer has determined the current and voltage needed to accomplish the weld, he then reviews duty cycle requirements.Duty cycle rating is the percentage of time during a 10-minute period a power supply can operate at rated output amperage without overheating. A 300 A machine at 60-percent-duty aircomprexsortankshoustontexas cycle can weld for six minutes at 300. A during aircomprexsortankshoustontexas a 10-minute period. Alter six minutes, the welder must rest the machine for the next four minutes aircomprexsortankshoustontexas and aircomprexsortankshoustontexas to avoid overheating the unit. Production vs. repair applications In general, production applications require high-duty-cycle power supplies, and repair applications can use low-duty-cycle portable aircomprexsortankshoustontexas units.Lift-arc GTAW Many DC power supplies are equipped with a list-start feature for, a variation of scratch starting, GTAW welding. When the welder touches the tungsten electrode to the workpiece, a small amount of current--15-20 A--flows. When he lifts the electrode from the work, the arc starts softly and the machine switches to the set weld-current value. This low-current starting minimizes weld contamination caused by touching the tungsten to the workpiece and eliminates the need for high-frequency aircomprexsortankshoustontexas starting. Searching for accessories for your air compressor? We offer the best selection of cheap air compressor accessories on the internet. Check out our website for great deales on all of our air compressor accessories!
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