Pulsers, etc

--Had Ernie in my shop yesterday; great fun! There were 5 of us,
pretty much hangin' on every word: every time he comes by I learn a fistfull
of new hacks. One thing he mentioned is that, even though they've been
around for a while nobody seems to have written anything in the way of a
comprehensive tutorial on what you can do with a pulser. He did a few of
what he calls "stupid welder tricks", but boy they surprised the heck outta
me! I've been trying to weld some 1/8" wire thingys and he comes over and
welds some 1/16" welding rods together, using the pulser and some insanely
high amperage. IIRC he had the pulser set around 500 cycles per second and
maybe 10% peak power. Interesting sound and impressive results. I can see
I've got a ways to go on my learning curve!
--Always good to have Ernie visit and point out blindingly obvious
things that shoot right over my head too. I'd been having trouble lately
getting a stable arc started with my welder; I just assumed I wasn't as
skilled as I thot I was. Turns out that the aluminum tank of argon that the
counter guy from Praxxair gave me last month was, in fact, full of CO2 and
mislabeled! I never would have known this but Ernie sez that argon is never
stored in aluminum tanks, due to the pressure limit on them being half
what's needed. (That's the third time Praxxair's fucked up on gasses I've
bought from 'em; the others were easier to spot: empty tanks marked 'full'
were the previous mishaps. Time to get an account elsewhere methinks!)
--Oh, and I found out why my earlier attempts at TIG brazing failed so
miserably: Praxxair sold me the wrong rod, even tho I had explained the
application B4 they ordered it special for me! I managed to get the correct
stuff from another company before 'class' and, with that and real argon (I'd
gotten a spare bottle (fortunately not mislabeled) in case we ran low with
all the welding we'd be doing) I finally got the hang of a process I've
always wanted to learn.
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I'm not sure if I've ever seen an aluminum tank for any kind of shielding or cutting gas. Isn't there a color code that's painted on the tanks? I've never welded outside of PSNS, so I don't know if our (PSNS) regulations are different from the real world!
The Praxxair place here in Bremerton isn't bad, but I have yet to try getting any gases from them. Any "stupid welder tricks" for making sure you're getting what you need?
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I've only seen AL tanks with CO2 for beverage stuff (and of course AL SCUBA tanks).
They're colored, but as far as I can tell it isn't very consistent. I've had Argon in both teal and maroon tanks and both seemed to be correct.
So far the two Airgas branches I've dealt with (pre and post move) have been good.
Read the label on the tank, and if something doesn't seem right when you try to weld, don't assume your skills have gone down the crapper since your last welding project.
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Pete C.
All my argon tanks are brown. With the exception of the green one.
Indeed. Ive gotton C25 on more than one occasion. When my tig electrodes start evaporating I know that they screwed up.
"Pax Americana is a philosophy. Hardly an empire. Making sure other people play nice and dont kill each other (and us) off in job lots is hardly empire building, particularly when you give them self determination under "play nice" rules.
Think of it as having your older brother knock the shit out of you for torturing the cat." Gunner
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Gunner Asch
Did your supplier replace your tungsten?
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Actually, yes they did, when I leaned on them a little.
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