MIG help, revised - Vintage Mustang Forums

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post #1 of 20 (permalink) Old 05-15-2017, 12:36 PM Thread Starter
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MIG help, revised

For those that offered advice on my initial, not enough heat to penetrate thread, thanks for the help.

I was able to swap my Lincoln 180 for another machine, which is working good. The only issue I have now is with the total inexperienced operator.

Once I got it hooked up, I wasted no time in messing around, I wanted to be sure it was the machine and not anything else. I went straight back to my discolored, unpenatrated quarter and burned in a quick hole to be sure I was good,....success.

I then laid down a bunch of tacks all over the quarter, wanting to see how the different speed / heat affected the tacks. I still don't have any info down, but the tacks ranged from flat, nippled, cut in half and other oddly shaped results.

Like everything, there's a lot to learn.

The first project is to cut my 2 x 1/8 square tube rotisserie down to a moveable cart, so I'll need to weld four 2 x 1/8 vertical braces to the existing horizontal base.

Then I'll be tacking in a new narrowed rear frame (back half), frame connectors, 14 point roll cage, 1/8" rocker supports, and bracing from the frame connectors to the rockers. Tacking on, certified welding to finish.


Help me out here:

What tour 75/25 flow settin?
What replacement .025 wire spool do you buy?
How thick is original and replacement quarter sheet metal?
Anyone use a tack nozzle for consistent tacks?

Wife,........."You drove how far for that thing?"
Daughter,..."Theres no inside and it stinks."
Friend,......."Dude, thats a rusted piece of sheet."
Son,.........."This old car is cool."

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post #2 of 20 (permalink) Old 05-16-2017, 07:22 AM
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Quote:
Originally Posted by Israel View Post
Help me out here:

What tour 75/25 flow settin?
What replacement .025 wire spool do you buy?
How thick is original and replacement quarter sheet metal?
Anyone use a tack nozzle for consistent tacks?
I'm no expert, I've only been welding for 5 years or so, all on the Mustang. Here are my answers, hopefully others will chime in.

1. It's been so long since I set this I have probably forgotten. I want to say mine is set to maintain 20 psi while the trigger is pulled.
2. I've used Lincoln, Miller, and Hobart with good results.
3. Most is 19 gauge, there is some variation
4. I have not
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post #3 of 20 (permalink) Old 05-16-2017, 08:00 AM
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1) Start very low on the air (think, nearly off!), lay a 1" bead. Keep adding air until you have no more porosity. I would personally then give it just a little more, but if you are in a garage, you wont need much. Crank it up when it's breezy, and leave it alone when it's not.
2) I'm of the opinion Hobart made some of the best consumables. Personal opinion. the big rolls i waaaaay cheaper in the long run.
3)No idea here
4) never have, get a solid 10 hours under your belt and you wont need one.
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post #4 of 20 (permalink) Old 05-16-2017, 08:21 AM
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I would suggest you watch this series of 4 videos. They answer most of the questions you might have.

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post #5 of 20 (permalink) Old 05-16-2017, 09:11 AM
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1. 20 with trigger pulled
2. Lincoln from Home Depot
3. ?
4. I haven't.
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post #6 of 20 (permalink) Old 05-16-2017, 09:25 AM
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What tour 75/25 flow settin?
Typically 15-20 unless outside and it's windy, then I'll crank it up some
What replacement .025 wire spool do you buy?
I prefer the Lincoln, but I'm biased- I have a Lincoln welder too..
How thick is original and replacement quarter sheet metal?
19ga typically, but as others have mentioned, there are some cheaper thinner terds on the market
Anyone use a tack nozzle for consistent tacks?
No need- after you've gotten used to your welder and have it set up correctly, you'll be able to write your name in cursive on plate steel. I think nozzles would be like using training wheels... on a trike.
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post #7 of 20 (permalink) Old 05-16-2017, 04:37 PM
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Unlike stick or flux core, MIG can be finicky as there are several things that can cause problems. I stick welded for 4 years when I graduated high school and then stopped welding for 18 years and then I started on my restomod in '99. First got a flux core welder and it worked fine for a while but it it's dirty and requires a lot of post-cleanup. It's really easy to use though. Then got a MIG and it was a different animal all together. MIGs are the highest maintenance of the 3 that i've done, because the gas shielding is not built into the rod or wire and voltage/wire speed takes a while to get dialed in. MIG welds great (once it's dialed in) and its very clean though.

Eventually you will want to weld and here are some things to keep in mind with MIG:

Clean nozzle and tip frequently. Spray some anti-spatter in the tip once in a while.
Replace tip periodically and use the correct size. It can wear and electrical contact with the wire can suffer
Replace Nozzle periodically. Taking it off to clean and back on after a while can distort it and wear the sealing surface out resulting in the nozzle not sealing and air can get sucked in around its base and mix with the gas and porosity will start to happen.
Clean air holes in the head periodically. You can unscrew the head and poke a wire through the holes to clean them.
Don't set voltage too high. Porosity can start to happen as the arc starts to get too violent.
Don't weld in the wind unless you have a wind breaker of some kind.
Gas outlet of 18-25 is a good range. Too high and porosity can happen due to turbulence.
Keep the stick out to about 1/4" to 1/2".
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post #8 of 20 (permalink) Old 05-16-2017, 08:18 PM Thread Starter
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For the Mustang only hobbiest, how big of a spool do you buy, and how long have you had it.

I'm not how sure big the sample spool was, but I went through that pretty quickly. More from bird nesting than use though.

Wife,........."You drove how far for that thing?"
Daughter,..."Theres no inside and it stinks."
Friend,......."Dude, thats a rusted piece of sheet."
Son,.........."This old car is cool."

USMC Security Forces, Kamiseya Japan, 0311

Build Thread: http://forums.vintage-mustang.com/vi...sted-pile.html

Last edited by Israel; 05-16-2017 at 08:22 PM.
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post #9 of 20 (permalink) Old 05-16-2017, 08:31 PM
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When they have them in stock...Lincoln Electric 12.5 lb. Spool Mild Steel MIG Welding Wire-ED023334 - The Home Depot

Otherwise, I get the 2lb spool.
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Regards,
Patrick
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post #10 of 20 (permalink) Old 05-16-2017, 08:33 PM
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For the hobbiest, how big of a spool do you buy, and how long have you had it.

I'm not how sure big the sample spool was, but I went through that pretty quickly. More from bird nesting than use though.
Israel, I am a hobbyist like you. I have a Miller 190 which is probably a lot like your Lincoln. When I built my rotisserie I went through 2 of the smaller rolls of wire. Probably more than I should have but being new to welding I was ok with it. After that I bought the big spool (10-12 lbs.). I figured why not. It doesn't go bad and I still have the trunk drop downs, outer wheelhouse and quarters on both sides to do, plus the outer fender apron and radiator core support to replace.

I figure that roll should get me through all of that with room to spare. And I won't have to worry about running out any time soon.
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post #11 of 20 (permalink) Old 05-16-2017, 09:04 PM Thread Starter
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Quote:
Originally Posted by patrickstapler View Post
When they have them in stock...Lincoln Electric 12.5 lb. Spool Mild Steel MIG Welding Wire-ED023334 - The Home Depot

Otherwise, I get the 2lb spool.

Yes, the 12.5 lb is $50 vs $12 for the small 2 lb.

How many 12.5'ers have you gone through?!

Wife,........."You drove how far for that thing?"
Daughter,..."Theres no inside and it stinks."
Friend,......."Dude, thats a rusted piece of sheet."
Son,.........."This old car is cool."

USMC Security Forces, Kamiseya Japan, 0311

Build Thread: http://forums.vintage-mustang.com/vi...sted-pile.html

Last edited by Israel; 05-16-2017 at 09:49 PM.
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post #12 of 20 (permalink) Old 05-16-2017, 09:08 PM Thread Starter
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-rgoniea, our cars look like twins,......at least they did before I started chopping mine up.

Wife,........."You drove how far for that thing?"
Daughter,..."Theres no inside and it stinks."
Friend,......."Dude, thats a rusted piece of sheet."
Son,.........."This old car is cool."

USMC Security Forces, Kamiseya Japan, 0311

Build Thread: http://forums.vintage-mustang.com/vi...sted-pile.html
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post #13 of 20 (permalink) Old 05-16-2017, 09:31 PM
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-rgoniea, our cars look like twins,......at least they did before I started chopping mine up.
Wow you're not kidding. I remember reading your build thread a while ago but didn't remember what your car looked like. I just went through it again and about the only difference was the distance I had to drive (2 hours) to pick mine up.
I won't be chopping mine up though, gonna keep it as a pretty basic DD.
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post #14 of 20 (permalink) Old 05-16-2017, 09:52 PM Thread Starter
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Quote:
Originally Posted by rgoniea View Post
Wow you're not kidding. I remember reading your build thread a while ago but didn't remember what your car looked like. I just went through it again and about the only difference was the distance I had to drive (2 hours) to pick mine up.
I won't be chopping mine up though, gonna keep it as a pretty basic DD.

Do you have a build thread,...what's the story with yours?

What did you pay and what did you trailer home?

Wife,........."You drove how far for that thing?"
Daughter,..."Theres no inside and it stinks."
Friend,......."Dude, thats a rusted piece of sheet."
Son,.........."This old car is cool."

USMC Security Forces, Kamiseya Japan, 0311

Build Thread: http://forums.vintage-mustang.com/vi...sted-pile.html
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post #15 of 20 (permalink) Old 05-16-2017, 10:29 PM Thread Starter
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How cool is this?


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Wife,........."You drove how far for that thing?"
Daughter,..."Theres no inside and it stinks."
Friend,......."Dude, thats a rusted piece of sheet."
Son,.........."This old car is cool."

USMC Security Forces, Kamiseya Japan, 0311

Build Thread: http://forums.vintage-mustang.com/vi...sted-pile.html
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