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I'm in the process of mig-welding in some rust repair patches. (That spot aft of the rear wheel arches, where innner fender, outer wheel arch, rear quarter panel, and spare-wheel well all come together is really cute!) Because I'm still learning to handle the welder, I'm sticking to the less visible, inside bits for the moment. The results are nothing to brag about, but I think I'm improving - I hope.
Question: There is caulking in the joints where the flanges of the panels are spot-welded together. Caulking between panels that are bolted together, like the inner and outer front fenders, makes sense. Actually, caulking between welded panels does too, but how do they manage to spot-weld the two pieces of sheet metal together through the insulating layer of caulking? Do industrial spot welders apply so much pressure at the spot to be welded that the caulking is squeezed out and conductivity is re-established? Can anyone clear up this mystery for me? I can't even get a decent tack weld unless both pieces of metal are shiny clean!
Bob S.
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Your guess is right, the caulking is still wet/soft and the pressure is
great enough to squeeze the metal together and squeeze the stuff out.
Can't do this with MIG- gotta weld first and then caulk which limits the
efficacy (how d'ya like THAT one??) the caulking coverage in grooves, etc.
--
George Downs, Bartlesville, Oklahoma, Central US
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George, I figured you'd have the answer, thanks. And "efficacy" is one of my favorite words, along with "pernicious." I just never seem to be able to get both of them into the same sentence.
Bob S.
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I spent some time in spot/seam welding tech support in the aircraft overhaul
industry.
A vocabulary sufficiently broad and deep is of great efficacy against the pernicious usage of clichés in lieu of cogent verbiage.
(I could probably do better if I thought about it a bit more.)
--
George Downs, Bartlesville, Oklahoma, Central US
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posted by
someone claiming to be mjamgb
on
Mon Aug 30 07:48 CST 2004 [ RELATED]
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lol
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I spent some time in spot/seam welding tech support in the aircraft overhaul
industry.
A vocabulary sufficiently broad and deep is of great efficacy against the pernicious usage of clichés in lieu of cogent verbiage.
(I could probably do better if I thought about it a bit more.)
--
George Downs, Bartlesville, Oklahoma, Central US
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Oh, that was splendid. I wouldn't dare venture to top that. I'll just sit here, stunned with admiration, and applaud deferentially.
Bob S.
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Lay it on any thicker and I'll get a swollen carapace!
--
George Downs, Bartlesville, Oklahoma, Central US
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Hey George! If that carapace turns out to be Hawkbill let me know ... I need some new mandolin plectrums!!!!
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My favorite instrument! Let me know if you are coming this way and we'll
chop a little wood! (Bring your axe!)
--
George Downs, Bartlesville, Oklahoma, Central US
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Walrus: I've been wondering for years--where is Bartlesville in geographic relation to Ft. Sill? Notwithstanding having dug entirely too many sets of trailspade holes, I thought Oklahoma was a great place. Never did get really cozy-feeling around scorpions and tarantulas, though.
--
We have met the enemy and they is us. [Pogo] S70 T5 cop car : Rough Rider tires& suspension, Walmart fog lights, eBay speakers, ambiance by Pall Mall, trim by Le Duc d'Tape, 8-channel THD by OEM amps
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Possibly not hard enough to check your map....
Bartlesville is on the 96th meridian 17 miles south of the Kansas line,
pretty much across the state both N/S and E/W from Lawton/Ft. Sill, where I
too dug many a trail spade hole. I was in artillery training there from
Feb-May 1961 and went on to be chief of section on an 8" Howitzer in
A and B batteries, 4th Howitzer Batallion, 30th Artillery (of which NOBODY
seems to know the current location, not even the 5th Batallion!)
Bartlesville is also 40 miles north of Tulsa and pretty close to the
middle of the country being on both US 75 (Galveston to Winnipeg)
and US 60 (Norfolk to LA). And if you are on the ½ mile where the two
run together it only takes ONE turn to get to my house.
--
George Downs, Bartlesville, Oklahoma, Central US
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Hey George! If that carapace turns out to be Hawkbill let me know ... I need some new mandolin picks!!!!
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completely off the original topic, but while we're in the general neighborhood of stringed instruments: I've had for a number of years, but never gotten around to learning to play, an instrument with the body of a small banjo, but the head and 8 strings of a mandolin. 1. What the hell is it?
2. How is it tuned? (I'm recovering from some neck surgery and need something besides this keyboard to build back the lost manual dexterity) 3. It's presently strung with sets of identical pairs of strings, rather than the one-high, one-low that I recall on the pairs of bass strings of the twelve-strings of my misspent youth. Is this an option, or a brain fart?
3. Since I also now enjoy the lost high frequencies associated with having played with cannons in an earlier incarnation, and with miscellaneous sidearms in the recent past, I expect that I'll need to buy one of those newfangled electronic tuning forks. Any suggestions?
--
We have met the enemy and they is us. [Pogo] S70 T5 cop car : Rough Rider tires& suspension, Walmart fog lights, eBay speakers, ambiance by Pall Mall, trim by Le Duc d'Tape, 8-channel THD by OEM amps
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It is a mandolin banjo and is tuned like a mandolin or violin, pairs of strings
in unison G D A E from biggest to smallest, 7 frets apart.
Mandolin strings will work if they are long enough. Bridge position may be
off (usually is). It can be adjusted by comparing the chimed and fretted
notes at the 12th fret. Should be exactly the same. If not, move the bridge
closer or further and get them to coincide. When they are the same then
you can go ahead and tune it up and probably should then check again as there
may be some flex or give in the instrument and placement is fairly critical
to good intonation.
There is a good variety of electronic tuners available in a number of different
brands. I prefer chromatic ones because then you can tune anything with them.
For bass and autoharp I use a clip-on pickup with my tuner. They can be gotten
from places that sell hammer dulcimers. Tuners continue to get cheaper and
cheaper, like some other electronic equipment.
--
George Downs, Bartlesville, Oklahoma, Central US
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