Here is a question i havn't ever seen asked

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Just for the fun of it i wanted to put this question out there. I already know the answer but would like to see who else does so maybe we can teach people maybe just one new thing. How come in the consumable arc (SMAW,GMAW,FCAW, ext...) DCRP provides maximum penetration into the base material Vs. the non consumable arc (GTAW,PAW,ext...) DCSP provides maximum penetration into the base material? --Gol'
Reply:I think I've got a pretty good answer, but I'll wait for some other folks to take a stab it.
Reply:The answer can be found in the ARC young grasshopper.  I dunno...Build a Barstool Racer at BarFlyRacers.com!
Reply:I dunno, how come we can't get a decent presidential candidate?pro-level dumpster diver                                     Hobart 125EZ
Reply:Now that I have finished the crawfish and Shiner Bock and have looked up DCSP/DCRP since I haven't seen either term used in years. DCSP = DCEN, electrons flow from the electrode into the work creating considerable heating in the workpiece and resulting in a narrow deep penetrating weld, the opposite is true for DCRP also known as DCEP with the electrons flowing from the work into the electrode, thus heating the electrode and leaving the workpiece relatively cool (it will also practically vaporize tungsten at high amps, guess how I know, lol) when using dc-tig. That is why dc-tig works so well on heavy aluminum. The 6010, and 7018 (7018 will sputter if used in DCEN, and get you fired) electrodes are DCEP as is gmaw. Fcaw is dcen, that's why you get all that splatter when you forget to switch polarity on your mig when going from gmaw to fcaw. The specific characteristics of the electrodes gets more complicated when moving to gas shielded wire and covered electrodes. Arc shape and penetration to a great degree are governed by the properties of specific shielding gases and the coatings of the stick electrodes. This information (considerably condensed and simplified here) is for the most part taken from "The Procedure Handbook of Arc Welding" and personal observation. In short changing polarity changes weld characteristics. That's the basics, and the actual material covers several pages in a couple of different chapters.Last edited by Jolly Roger; 02-25-2008 at 08:45 PM.Reason: rewordingThe difference between art and craft is the quality of the workmanship. I am an artist.
Reply:I dunno..I failed math and sandbox miserably as a kid too.....zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Originally Posted by Jolly RogerNow that I have finished the crawfish and Shiner Bock and looking up DCSP/DCRP since I haven't seen either term used in years. DCSP = DCEN, electrons flow from the electrode into the work creating considerable heating in the workpiece and resulting in a narrow deep penetrating weld, the opposite is true for DCRP also known as DCEP with the electrons flowing from the work into the electrode, thus heating the electrode and leaving the workpiece relatively cool (it will also practically vaporize tungsten at high amps, guess how I know, lol). The 6010, and  7018 (7018 will sputter if used in DCEN and get you fired) electrodes are DCEP as is gmaw. Fcaw is dcen, that's why you get all that splatter when you forget to switch polarity on your mig when going from gmaw to fcaw. This information is from "The Procedure Handbook of Arc Welding" and personal observation. In short changing polarity changes weld characteristics. that's the basics, don't feel like getting more in depth.
Reply:With FCAW (self or gas shielded) maximum performance and thus maximum penetration is acheived with whatever polarity as listed by the manufacturer of that particular wire. Reversing the polarity from the manufacturers recommendations makes a mess and acheives nothing.
Reply:Originally Posted by Go1lumi think you need to go back to the books. look in the lincoln book again FCAW is dc+ or dc-, actually all of the prequalified proceedures for FCAW-G are DC+, and FCAW-S is both. DCEP in stick mig flux core gives max penetration compared to dcen. DCEP the electrons are flowing from -to+ so the work gets most of the heat and the electrode stays cooler. But it is different in gtaw and paw and dcen gives max penetration and i'm wondering if you can tell me why one polarity gives max penetration for the consumable arc and another gives max penetration for the non consumable arc.
Reply:Originally Posted by Jolly RogerPerhaps you should go back to the book. I regularly use an all-position fcaw-g wire specified by the manufacturer for dcen (don't know what it is, go find out). Yes you are correct, but nitpicky as h@ll, of 18 different FCAW-S electrodes 4 are DCEP and all 4 are limited to 1G, 2G, and 2F. Not terribly versatile are they, about like 7024, and if you use them in any other position your welds are suspect. But I got you figured out already. All you were doing was looking for someone to F@CK with and a chance to try and show off what your college teacher told you yesterday weren't you. Now tell me how much welding you have actually done, oh that's right, not much, 19 and going to school. By the time I was your age I had 11 years at it. And in the now 40 years I have been doing it never once has the question you have posed ever been an issue. Who cares about electron flow and what it does to the electrode and the base metal, worry about what goes into doing it right, and use the polarity the manufacturer specifies like true welders do. Now go back to school, learn to weld, and quit trying to be a smart@ss. It doesn't earn you any respect or friends. And since you are all knowing regarding electron flow and weld characteristics get to explaining for us lesser mortals instead of looking for someone to squawk at. But be advised I will check you on it, and never ever let me catch you making a mistake or oversimplification because I will cut you no slack. Deguello. And learn to spell, it makes you look bad.
Reply:Originally Posted by Go1lumYears of experiance doesn't mean your better than me. I'm not scared to go head to head against anyone in a welding competition. I've took first place in several welding competitions. I'm not squacking at anyone. I'm coming here trying to help people and maybe teach them something new and if you don't like that you can sucka ma **** Your not to jolly maybe you should change your name to D!ckhead Roger
Reply:This thread is locked.I have a lot more to say, but better not DavidReal world weldin.  When I grow up I want to be a tig weldor.