Fake tig beads

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I was foolin around with the 'spot' timer thing and used it to 'weld' a cap on a leg of my mig table. Attached Images"after a long day of doing nothing...its gooood to kick back" Pumbaa
Reply:How long was the weld time set to?
Reply:Originally posted by Hickey How long was the weld time set to?
Reply:I had heard that a stack of dimes was the preferred dimension for a TIG weld, so here's my sample weld. Attached Images
Reply:I am thinking that this was how they did this weld... with a timer..
Reply:Originally posted by Planet X Fairly sure it was something less than 1 sec. Sorry, thats all I have, not really familiar with the thing-just screwin around with it when I took that pic.
Reply:Originally posted by Hickey I am thinking that this was how they did this weld... with a timer..
Reply:Good point on the cover weld. the pic is of a desert prerunner, and yes, they take a hell of a beating.
Reply:I tell you,seems like if one can afford to use chromoly one can afford some real welding education. Course when these coilovers rip off the owner will think he was 'really gettin it' and not bat an eye when he throws a few more bills this shops way to 'upgrade'....  Assuming the failure is not catastrophic."after a long day of doing nothing...its gooood to kick back" Pumbaa
Reply:Originally posted by motordoctor I had heard that a stack of dimes was the preferred dimension for a TIG weld, so here's my sample weld.
Reply:Originally posted by Hickey I wonder how well it penetrates in comparison with a standard weave or stringer bead.
Reply:Ahhh motordoctor, thanks for that pic. that made my night.
Reply:Originally posted by Planet X I tell you,seems like if one can afford to use chromoly one can afford some real welding education.
Reply:I was going to post that picture every time somebody talks about "stack of dimes" weld beads, but I finally got around to taking the picture tonight.
Reply:I tell my nephew's with the welding shop when they ask me how my welding is going, "I'm just making dimes" is what I usually say.  I like your pic, thanks and yeah, my stick beads look just like that!!
Reply:Originally Posted by Planet XWell it sure looks like  mig spot welds to me; no heat affected zone seen, mini-crater from electrode on each spot. Very good looking, but very poor fabbing practice. Seems to me something like this application would have a real root pass and use the spot welds for a cosmetic wannabee tig beads.Mig spot welds on metal of any thickness should be consider no stronger than tack welds.
Reply:I've done some destructive testing using a tack and move techinique on my mig vs. standard SST. For sheet and exhaust tube, its great and had no difference in strength. With thicker items, if you crank the heat up it was not noticably weaker. Problem with that is wire burnback. Granted, my testing techniques are not exactly scientific, but the destructive testing and cutting a cross section was enough to convince me its acceptable for non-cert work. Its not going to pass xray but if you can deal with the burn back I think its fine for more general fab.Some people would rather ever weld they make be like they were doing a coupon. In the real world, you have to do what works and this style of pulsing mig does the trick in certain circumstances IMO.