V groove uphill questions

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Right now in school they are having us doing uphill stick v groove with 1/8 7018 they say put 2 passes in for the root. I always thought it was 1 pass. Is this correct? They also don't teach howto weave they say is bad and traps slag. My other school taught us to weave so I don't know who to believe.
Reply:Isn't the first pass the only one that is considered the root?Root, fill, cap is the progression isn't it?Weave vs straight is an issue that has strong support on both sides.  I like to weave uphill (after the root) personallyDave J.Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:A lot will depend on the  joint prep. Open root or backing bar? With a backing bar I've usually seen it done in 2 passes. Open root, usually 1 because the gap is much smaller. As far as the "weave" goes, depends greatly on how large you do your weave..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:If the gap is big enough for a 2-pass root, that is child's play! Less chance of wagon tracks!Far as weaves, remember the 3 x the rod diameter rule?Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Originally Posted by DSWA lot will depend on the  joint prep. Open root or backing bar? With a backing bar I've usually seen it done in 2 passes. Open root, usually 1 because the gap is much smaller.
Reply:It has 1/4" gap with backing
Reply:Originally Posted by smilexelectricIt has 1/4" gap with backing
Reply:Originally Posted by CEPPiece of cake! The more room you have to move, the easier to keep the bead flat.
Reply:at my school our bevel plate class was just open butt 6010 root 7018 fill and cap. After having a company come in and talk to us our instructor decided to add backing bars to the project list on top of open root. I havent got to doing backing strips yet, but if I remember correctly he said to weave on the root? pausing on the edges to make sure you break it down? just going off memory here.
Reply:They want me to shoot 1 stringer in the bottom of the bevel of one plate but not touch the other, then shoot one in the other bottom of the bevel plate, then fill to the top. I always thought you just weld 1 pass in for the root not 2.
Reply:Originally Posted by smilexelectricThey want me to shoot 1 stringer in the bottom of the bevel of one plate but not touch the other, then shoot one in the other bottom of the bevel plate, then fill to the top. I always thought you just weld 1 pass in for the root not 2.
Reply:V Groove Up Hill, Sideways, Upside Down.... Oh hell your talking about welding Huh?
Reply:So what do I do 2 passes or 1 pass. Or learn them both. And what is wagon tracks and what causes them.
Reply:You have to do what ever is written in the WPS, or what your instructor says. Sure learn both ways, see which way works best for you.Wagon tracks are when the weld is too high in the center. Attached ImagesDon’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Either technique, stringers or weave, can be used on the root provided you get good penetration and melt the edges of your base plates.  With a 1/4" root and backing plate it is certainly possible to run 2 stringers for the root pass.  Learn the technique so that you can use either stringers or a weave when the situation calls for it in the future.
Reply:Originally Posted by CEPYou have to do what ever is written in the WPS, or what your instructor says. Sure learn both ways, see which way works best for you.Wagon tracks are when the weld is too high in the center.
Reply:Wagon tracks= undercut?Ranger 305gMillermatic 140 AutosetDewalt Chopsaw2 grindersMy Fists
Reply:Stringers are stronger because it puts less heat in the metal and has less tendency for slag inclusion...at least thas the way I was taught.I did the exact same test and I just bumped the sides on the root pass and then after that ran stringers.For me it was easier to turn the machine down to 99 amps for the root and also stop in the middle to let it cool. Otherwise I would start getting arc blow and stalagtites. After a couple passes I would bump it up to 105 and around pass number 20 I would bump it up to 110 for the rest. (1 inch unlimited thickness bend test)Clean the heck outta your toes! If there is any slag left it will fail and it seems like it likes to get caught at the toes. Especially if you have a little undercut!Remember the surfacing exercises. Its the same exact thing. Each bead overlaps half of the last one.
Reply:Originally Posted by smilexelectricSo what do I do 2 passes or 1 pass. Or learn them both. And what is wagon tracks and what causes them.
Reply:Originally Posted by rschreckI would assume it would make more sense to do what your instructor tells you to do. Obviously he/she knows what they are talking about or they wouldn't be teaching a welding class at a college/tech school. Just my $.02.EDIT to say I don't mean for this post to sound rude, mean, that sort of thing.
Reply:Well he's got one thing going for him. Your instructor knows that multipass stringers are better practice than big weaves. Dude you don't wanna be weaving an inch side to side on a bend test. It will make your HAZ 10X bigger and if you don't know what your doing, your plate will bust apart in the bender. If you care enough about a weld to make it bend test quality take your time and do multipass stringers and let it cool down inbetween welds.That's just my opinion, I could be completely wrong, but his technique worked for me all the way through 4G unlimited certification. When it comes down to the nutcut what works for an instructor might not work for you. The only thing that will actually help you is time in the welding booth.
Reply:Originally Posted by jamesyarbroughWell he's got one thing going for him. Your instructor knows that multipass stringers are better practice than big weaves. Dude you don't wanna be weaving an inch side to side on a bend test. It will make your HAZ 10X bigger and if you don't know what your doing, your plate will bust apart in the bender. If you care enough about a weld to make it bend test quality take your time and do multipass stringers and let it cool down inbetween welds.That's just my opinion, I could be completely wrong, but his technique worked for me all the way through 4G unlimited certification. When it comes down to the nutcut what works for an instructor might not work for you. The only thing that will actually help you is time in the welding booth.
Reply:Originally Posted by smilexelectricIf you came to my school you would realize the teachers are complete garbage. The instructor sits around talking on his phone and playing games on his phone. The adviser thinks he is a welding god, but have yet to see anything from him that makes me think so as well. They don't teach weaving stick welds, but I learned at my old school. It is really hard to get info out of them.
Reply:I bet you go to arclabs dont you?
Reply:I've always done a one pass root two sets of fillers and 3 or 4 stringers for a cap