Duty Cycle question

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On my Craftsman AC 30-230 the duty cycle is rated at 100% at the lower current settings and decreases to 20% at the high end. I get the concept.My Lincoln AC/DC225125 lists 20% duty cycle at all settings. That I don't get.I'm used to not focusing on clock watching or keeping this in mind at the lower settings on ol' Crafty. Typically chipping and such in between welds is a break in weld time, but generally not 2min on / 8 min off.Thanks ahead.Lincoln AC/DC 225/125 and WP17. 75A AC is for pipe thawing!HH 140 - new addtion 9/2012.I didn't agree, but hoped for Hope and Change.I got change for myself and my family: for the worse.This is the reality of: Barackalypse Now. Again.
Reply:I don't get the Lincoln AC/DC 225/125 rating either.  Where did you see that?I have a couple of those welders; all they say on the front panel is:"225 amp AC or 125 DC at 25 volts, 79 V max OCV at rated input, 20% duty cycle"To me that means:Duty Cycle...AC Amps...DC Amps20%.............225...........12530%.............183...........10240%.............159............8850%.............142............7960%.............130............7270%.............120............6780%.............113............6390%.............106............59100%............101...........56That's general rating for all users.  Now for those guys in 120F+ in Texas summer maybe it's less.  It sure as heck is more me in a Canadian winter - no danger of overheating soon when all components start at below zero!If concerned, put you hand in front of the outlet vents - hardly ever seems warm to me.Last edited by Rick V; 10-31-2011 at 04:41 PM.Reason: spell errosRick V 1 Airco Heliwelder 3A/DDR3 CTC 70/90 amp Stick/Tig Inverters in Parallel1 Lincoln MIG PAK 151 Oxy-Acet
Reply:Duty cycle is how long you can weld in 10 minutes. 20% duty cycle, means you can weld 2 minutes, and the machine cools for 8 minutes, 40% duty cycle, 4 minutes welding, 6 minutes cooling and so on. My little machine automatically shuts down after welding for to long to keep it from burning up. My SA 200 (which is a stick machine) has a 60% duty cycle and has never stopped welding because it got hot. Hope this helps.
Reply:Hi RickHere:http://www.lincolnelectric.com/asset...ln3/imt237.pdfPage 10: Duty Cycle(For Codes 11604 and below). The 60 Hz welders are rated20% duty cycle and the 50 Hz welders are rated 15% dutycycle for the welding current shown on each switch position.Odd, that implies 20% across the board.Where is your chart from? Like I said that makes sense to me and jives with what is on ol' Crafty.I'm working on a name for the Lincoln. Maybe Abe, I dunno yet.Hi Cajun:Thanks, I'm familiar with the concept, hence the 2 min on / 8 min off statement in my OP. I usually see the % rating listed at a specific amperage. It's just plain wierdLast edited by jtcnj; 10-31-2011 at 06:51 PM.Lincoln AC/DC 225/125 and WP17. 75A AC is for pipe thawing!HH 140 - new addtion 9/2012.I didn't agree, but hoped for Hope and Change.I got change for myself and my family: for the worse.This is the reality of: Barackalypse Now. Again.
Reply:Originally Posted by jtcnjI'm working on a name for the Lincoln. Maybe Abe, I dunno yet. It's just plain wierd
Reply:Originally Posted by jtcnjPage 10: Duty Cycle(For Codes 11604 and below). The 60 Hz welders are rated20% duty cycle and the 50 Hz welders are rated 15% dutycycle for the welding current shown on each switch position.Odd, that implies 20% across the board.I usually see the % rating listed at a specific amperage. It's just plain wierd
Reply:I do believe 20% duty cycle limit on all settings is correct.The reason is, all the wires going to the range switch are different sizes.If the wires were all the same size then Rick's chart would be right.Changed a few of these range switches, even the switch has different size contacts and conductors. Every thing is sized to have a 20% duty cycle rating.
Reply:Might be worth an email to Lincoln...Lincoln Handy mig Longevity Stickweld140Hobart Handler 210
Reply:I'm thinking that on a multi-tap type machine(lincoln),if the selector switch is moved to alower current setting,it puts more windings in secondary circuit.More windings gives you lower current ,higher voltage,same wattage(watts=voltsxamps),same duty-cycle.Miller a/c-d/c Thunderbolt XLMillermatic 180 Purox O/ASmith Littletorch O/AHobart Champion Elite
Reply:Originally Posted by ccawgcI do believe 20% duty cycle limit on all settings is correct.The reason is, all the wires going to the range switch are different sizes.If the wires were all the same size then Rick's chart would be right.Changed a few of these range switches, even the switch has different size contacts and conductors. Every thing is sized to have a 20% duty cycle rating.