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  #11  
Old 06-13-2018, 01:43 AM
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That is an Airco miget spool gun. Should be lots of info out there, i believe they are still in production.
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  #12  
Old 06-13-2018, 09:09 AM
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Thanks for the reply Robb. As it turns out, I can't get the little Airco to lay a bead. I spent a half day messing with it, no joy.

At first, the gas solenoid was stuck closed, a small "laying on of mallet" fixed that. messing with wire speed, gas flow and amp setting on the old Thunderbolt just didn't seem to make much difference, nor did changing contact tip and shielding tube. I even Teflon taped the tube and checked for the gas flow/leaks

I'm no stranger to small spool guns, but this old girl just dosen't want to play nice with the little Thunderbolt CC power supply. Again, I was told that it ran fine last time it was used (story of my life)

Any helpful hint, past experiences or, as usual, cast aspersions are welcomed. All I'm getting now are soot covered dingle balls...

Help, I'm right on the edge of paying somebody to weld up the flatbed.

RED
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  #13  
Old 06-13-2018, 09:49 AM
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Quote:
Originally Posted by RED caddy View Post
I'm no stranger to small spool guns, but this old girl just dosen't want to play nice with the little Thunderbolt CC power supply. Again, I was told that it ran fine last time it was used (story of my life)
You are on the DC side, gun (+) correct? There might only be one "sweet spot" in the settings the gun will function adequately at.
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  #14  
Old 06-13-2018, 10:26 AM
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What gas are you using? Maybe they were using helium?

Getting that to work on a CC machine versus a CV machine will be tricky.



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  #15  
Old 06-13-2018, 01:02 PM
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Well DUH, I just took for granted that aluminum would be AC. I'll try it in DC, gun+ There is no hi-freq start so I really don't expect much. Would it reach spray transfer in DC ?

It came to me with a full tank of Argon, so I have to "assume".

Way too hot right now to close all the doors and weld. (It's summer in SW Floriduh. 79° 75% humidity @ 0730, 99° 98% humidity @ 1430. Waiting for the 1600 rain, to cool off a bit ) cotton sleeves and a T shirt is too hot...

In most of my other excursions into the world of spool guns, I plugged everything in, set the amps a bit higher than I thought prudent, started with the wire speed on zero, pulled the trigger and turned up the wire feed speed until I got something resembling a bead. Slight adjustment of amps until the puddle quieted down and played nice.

Is this an acceptable method?

RED
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A 160 MPH drive, down a 2 lane blacktop, all by yourself, is NOT anti-social behaviour... I drag race because football, baseball, and golf only need ONE ball. Paul.


What I really need to know is, WHEN DOES THE SHOOTING START?

Last edited by RED caddy; 06-13-2018 at 01:11 PM.
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  #16  
Old 06-13-2018, 02:26 PM
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Quote:
cotton sleeves and a T shirt is too hot...
Hell Red, even Tom Z welds nekid. lol

Press on Red, press on
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  #17  
Old 06-13-2018, 03:50 PM
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It may very well come to that, but we're gonna have to 2 bag the dog so he don't howle...Now I know why there are no winders in the shop.

Bright red RED.
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What I really need to know is, WHEN DOES THE SHOOTING START?
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  #18  
Old 06-15-2018, 11:05 AM
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Quote:
I just took for granted that aluminum would be AC
So, any headway?
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  #19  
Old 06-15-2018, 12:18 PM
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Well, I plugged it up DC + and maxed out the amps (250) by playing with the wire speed, I got 2 sorta beads about 3/8ths of an inch long, but no penetration. They both came off with the wire brush.

After an hour of futzing and fuming, I turned her off, unplugged and neatly wound up all the cables.(did I mention that's it's WAY too hot for messing around with crap that won't work?)

About all I can hope for now is a local welder that won't bend me over too far...

wet RED
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A 160 MPH drive, down a 2 lane blacktop, all by yourself, is NOT anti-social behaviour... I drag race because football, baseball, and golf only need ONE ball. Paul.


What I really need to know is, WHEN DOES THE SHOOTING START?
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  #20  
Old 06-15-2018, 12:28 PM
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Quote:
Originally Posted by greywynd View Post
Getting that to work on a CC machine versus a CV machine will be tricky.
Chief,

Ummm, yeah... MIG welding without the use of a voltage sensing feeder
and using CC machine will be damn near impossible.

But yeah DCEP is what you want to run for solid steel or aluminum wire
and pure argon for shielding gas, 20-25 cf/h flow on the gas.

Clean up all your aluminum with a clean stainless steel brush right before
welding.

Good luck, because you are going to need all you can get.
Ron
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Last edited by Shade Tree Welder; 06-16-2018 at 07:45 AM.
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