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  #11  
Old 03-23-2010, 08:10 PM
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jamlit jamlit is offline
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Well you are off to a good start. When using a 110 volt welder, you will find that it works much better on clean metal. It does make a big difference.

Glad to see you got the welder fixed to.

Have fun.
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  #12  
Old 03-23-2010, 10:31 PM
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Don't try welding chrome moly with that ER 4043. That wire is aluminum alloy. You may find that welding aluminum may be difficult with your mig setup. My experience has been less than gratifying. Feeding aluminum wire through the gun is sort of like pushing a rope. The wire birdsnests between the roller and the end of the cable liner. At least that has been my experience with the Hobart unit that I have. I haven't tried with the Miller unit that I have. I had a plastic liner for the Hobart that was made for aluminum wire to keep it from contaminating I suppose. They make spool guns for mig welding aluminum which pulls the wire through the liner.

Last edited by mr.c; 03-23-2010 at 10:33 PM.
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  #13  
Old 03-23-2010, 10:37 PM
Charley Davidson Charley Davidson is offline
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I was told by the guy I got the wire from it was aluminum but was going on his word. Thanks.

i think hooking a spool gun to my 140 is a lot easier and cheaper than the older units like the 135.

I was out welding in the dark, didn't want to stop after I got things going right.
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  #14  
Old 03-23-2010, 10:40 PM
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Joe Hartson Joe Hartson is offline
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Mr C you are correct on both counts. The wire is for aluminum not chrome moly my error.

Welding aluminum with Mig is not the best choice. If you do use a spool gun set up and push the weld don't pull it. You have to have the argon flowing over the weld.
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  #15  
Old 03-23-2010, 10:57 PM
Rod S. Rod S. is offline
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Charlie, What polarity are you running? With the solid wire you should be running electrode positive. With all the spatter balls on the sheet it looks like you may be running electrode negative?

Rod S
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  #16  
Old 03-23-2010, 11:01 PM
Charley Davidson Charley Davidson is offline
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It's hooked up the right way, checked it a couple times to be sure.
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  #17  
Old 03-23-2010, 11:05 PM
Charley Davidson Charley Davidson is offline
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Forgot to ask or maybe I did earlier and it got missed. What is the proper flow for the 75/25 mix and mild steel I'm using? Also what should the pressure gauge be set at?

I'm sure I've wasted a ton of gas already with the leak.
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  #18  
Old 03-24-2010, 04:10 AM
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I normally run about 24 - 30 depending on some conditions. Make sure you don't run to high of flow rate as it can cause the same problems as low flow rate. Porosity is caused in high flow rates from turbulence at the cup.
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  #19  
Old 03-24-2010, 08:34 AM
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Kerry Pinkerton Kerry Pinkerton is offline
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Charlie, I just recalled that you're working outside. In my experience it doesn't take much of a breeze to blow the shielding gas away. My shop has openings all over and if I'm welding and it's breezy, I usually have to shut some doors or the welds suck.

If you get some clean metal, you'll notice a big difference in the look of the welds. The rust will contaminate the puddle.
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  #20  
Old 03-24-2010, 08:42 AM
Charley Davidson Charley Davidson is offline
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Thanks guys, Those are factors I did not consider or even really know.

Gotta go pay a bill then back to playing with the welder and a fun little project I'm working on.
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