mig questions, sample pics added |
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mig questions, sample pics added |
jimkelly |
Aug 21 2013, 10:29 AM
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#1
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
my original argon valve was bent up and leaked, so I ordered a new one. it had again, different sized threads, jeez.
so I went to ace ( r towel advice) and went with barbed fitting at both ends since the new argon valve came with a 1/4 barb already. question - when you are done welding and want to purge the lines of argon, after shutting the valve on the tank, do you have to waste wire or is there a way to purge without wasting wire? also, I expected the bead to stay at 15 psi when i turned the brass valve open, but it only rises to 15 psi or what ever I set it at, when I pull the red trigger on the mig - is this normal? also - I prepped some of my old real estate signs for practice : ) jim Attached image(s) |
Andyrew |
Aug 23 2013, 04:36 PM
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#2
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
That's a great way to learn what the settings do.
To be honest 2.5b looks like the best setting for that metal. Its definitely about 20 ga if it reacts like that. Your optimum weld is one where you jave your bead up top but just a tiny bit of metal coming on the back side. You see that with 2.5b 3c looks more like its putting a lot of metal down. There is almost as much weld above the metal ad below it. This will cause metal warpage as you see a lot of heat being thrown around. Now do 10 lines of 2.5b and 10 of 3c. And post the pic. We need to work on your form. Be aware you can weld with any of these settings and lots of times you will as your metal is never the perfect thickness while working on cars.. sometimes its geound down or really thin, ext. After you did the 20 lines cut the signs in half and lay them over each other with about 1" of overlap. You'll be doing a lap weld. Use the 3c setting for this on 1/2 the pannel and 2.5b setting on thr other half. Weld a 2" line, skip an inch and wait 10 seconds contemplating and adjusting your techique (not settings). After that do a butt weld with no gap same thing Then when your done with all that drill some 1/4" holes and weld them up. Use the a 2.5b setting or even 3b (c will make to much heat). Work in tacks around the hole till you have tacks all the way around it, then lay a quick bead over those tacks and a small bit in the middle to join it. This will teach you how to prevent form just burning through the metal when you hit thin or rusty spots. Go up to 3/4" holes when your confident. When you can do all that you'll be able to really handle welding on the body. Good luck and keep us posted! |
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