backstepping

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what is the reason for doing this? - thanks, ed
Reply:I was taught to weld cast like that.  One inch, then start an inch ahead and go back to the last bead.  Its supposed to be less stress and run cooler.DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:Backstepping (Tig) is where you start the bead..You start it and instead of proceeding forward..You go backwards for one dip and then continue in your usual fashion....It makes the "Horseshoe" effect at the start dissapear.. ...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:backstepping is a method for reducing distortion. skip welding is a similar process. basically you don't run one long continuous bead. instead weld for a set length (say the run out length of an electrode if using stick), move and repeat until the seam is finished.google 'backstepping welds' and you'll find some much better diagrams than this poor example and more in depth explanations of distortion control
Reply:It also gives a better looking weld that requires no grinding if you have long welds that will be visible to the public.  You can lap cleanly onto the old weld making it almost seamless.  Starting from the same point you stopped at will leave a bulged out area or an indentation depending on where you start at.Here are some pics I posted in another thread today.  They show how a backstepped weld can make a bunch of welds seem like one big single weld.
Reply:thanks all!