|
|
 Duty-Cycle RatingPower-supply rating depends on the type and thickness of the workpiece and the length of time it takes to deposit the longest weld on the thickest material. Duty cycle is the key factor to consider when selecting a power source. Once the engineer has determined the current and voltage needed to accomplish the weld, he then reviews duty cycle requirements.Duty cycle rating is ColemanPowerjatePortable5 the percentage of time during a 10-minute period a power supply can operate at rated output amperage without overheating. A 300 A machine GallonAirTank at 60-percent-duty cycle can weld for six minutes at 300. A during a 10-minute period. Alter six minutes, the welder must rest the machine for the next four ModelC5 minutes to avoid overheating the unit. Fused fluxes are melted ColemanPowerjatePortable5 in a furnace, chilled, then GallonAirTank crushed and screened ModelC5 for size. These pickup little moisture and recycle without alterations in particle size or composition. Bonded fluxes are powdered materials mixed dry and bonded together with ColemanPowerjatePortable5 a silicate, pelletized, baked, broken up, and screened for size: the process permits easy addition of deoxidizers and alloying elements. Bonded fluxes allow thicker flux layers when welding and can GallonAirTank be identified quickly ModelC5 by color. Disadvantages of bonded fluxes are their absorption of moisture and alterations ColemanPowerjatePortable5 during handling in panicle size and composition due to particle segregation. GallonAirTank Agglomerated fluxes are similar to bonded fluxes except that they use a ceramic binder. They require higher ModelC5 baking temperatures during manufacture, which ColemanPowerjatePortable5 limits GallonAirTank additions of deoxidizers and alloying elements. Mechanically mixed fluxes are combinations of two or more bonded or agglomerated fluxes. They allow special flux mixtures for critical welds, but they may separate during storage, use, and flux recovery. Saw ModelC5 Uses CV or CC Power Supplies,... 200 to 1,500 A, 28 to 44 V, at 60- to 100-percent-duty cycle. Automatic units commonly use up to 1,500 A on one wire. Cv welding machines that offer variable-slope control give the welder extra adjustability, and can extend the usefulness of the machine to weld a range of material thicknesses and types.Selection ColemanPowerjatePortable5 of Power SourcesWhen choosing a power source, start by checking NEMA specs. NEMA Class I arc-welding power sources deliver rated output GallonAirTank at 60-, 80-, or 100-percent-duty ModelC5 cycle: Class II units, 30-, 40-, or 50-percent; and Class III, 20 percent. First consider capacity and kind of current needed for the job. Rely on the manufacturer''s rating as being conservative: don''t buy more capacity than needed. Choose low--duty-cycle machines only for maintenance or for intermittent welding. If portability is important, consider inverter units. 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!
|