1st time at 6G with miller 150stl 6010p open root who says it cant be done

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sort of a long title but there have been a few other posts that have indicated that open root on pipe with the 150 stl wouldnt work or that 6010 wont work with that weldor either so my Son and I went ot to set some up and this is the 1st time at it for both so pick away.ThanksRon Attached Images
Reply:So what does the root look like?  Thats how you tell if a machine has the balls to run open root.Have we all gone mad?
Reply:it was done with esab 6010-10P plus 1/8 inch rod machine set at 90 Attached Images
Reply:Looks to me like you just proved yourself wrong.  Thats a terrible root pass.  Now it could probably be argued that a more talented weldor can put a root in there with that machine.  I have put a few in with a maxstar before.Have we all gone mad?
Reply:I would hope that a more talented person could do better this was his 1st try at it, but I think the machine has the cajones to do the job and in time I am sure he will to.
Reply:Ah missed that part.  Well for a first time its not bad at all.  I do think those little 110v inverters have more omph then people give them credit for.  But those are the same guys who think you need a '72 SA-200 to weld pipeline. Have we all gone mad?
Reply:I've got a test joint just like that, which I hate to see destroyed when I try to weld it. I just need more 6010 practice first. City of L.A. Structural; Manual & Semi-Automatic;"Surely there is a mine for silver, and a place where gold is refined. Iron is taken from the earth, and copper is smelted from ore."Job 28:1,2Lincoln, Miller, Victor & ISV BibleDanny
Reply:I dont understand this thread. Miller maxstar 150 and open butt root? Whats the problem, other than you think you should be running open butt roots at 90 amps. Bevel, face, gap? What are the specs on this experiment?At 90 amps, you dont have much for penetrations inside at all. Only flux on the inside of that pipe.UA Local 598
Reply:Originally Posted by WHughesI dont understand this thread. Miller maxstar 150 and open butt root? Whats the problem, other than you think you should be running open butt roots at 90 amps. Bevel, face, gap? What are the specs on this experiment?At 90 amps, you dont have much for penetrations inside at all. Only slag on the inside of that pipe.
Reply:I've made the comment that the Maxstar is not a good machine for 6010 root passes.  Your pictures prove my point.  My comments stem from the fact that the Maxstar has an automatic 'hot start' built in that you can't turn off.Post number 1, picture 4 shows some huge divots in the root pass.  I'm guessing those huge pits are from the hot start feature vaporizing the root pass and surrounding bevel during a restart.  I saw this during my own personal attempts at root pass welding on 2" sched 40 pipe using the Maxstar I used to own.The root side lack-of-fusion and insufficient reinforcement defects are more about machine settings and technique than they are about the machine itself.  Given the pictures are of a first attempt, those issues aren't surprising.  The hot start feature is OK for E7018 or E60XX when running fillets or groove welds with a backer.  But for open root joints it does more harm than good.  You need an adjustable dig or arc force control for root pass welding with E6010.  Even a way to shut off the hot start would be a big improvement with the Maxstar 150 if you want to stick weld pipe.Last edited by A_DAB_will_do; 07-13-2010 at 08:54 AM.Benson's Mobile Welding - Dayton, OH metro area - AWS Certified Welding Inspector
Reply:lets not forget the safety issue i spy a gas can not 4 ft away from where hes weldingmiller maxstar 150   hobart handler 210 w mig conversion hobart 250 arc force plasma cutter    boston ind cutting torch miller performance auto darkening helmet milwalkee 14in chop saw 10,000 watt generator huge drill press and industrial band saw
Reply:The Maxstar 150 just plain sucks running 6010, you cant long arc it, and it dose'nt have enough balls to keep it lit. For 3/32" 7018 and TIG it great.Disclaimer; "I am just an a$$hole welder, don't take it personally ."
Reply:The automatic hot start would cause a large keyhole that you would have to fight all the way. The pics above show the opposite. No penetration. Im not completely familiar with the 150 but have used the 200 plenty with no 6010 root issues.UA Local 598