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hwingo
12-13-2008, 07:47 AM
Hi Guys,

I’m thinking on buying a welder. Miller is my preference.

It’s very unlikely that I would ever *weld metal* thicker than ½ inch although it would be nice to have the capability of “tacking” such thicknesses from time to time if so desired.

Main applications will be car body work (welding sheet metal into voids that would support body filler), welding steel plates, etc., and welding aluminum up to ¼ inch in thickness.

I have never been formally trained in welding and I have limited experience. Having said this, when I was a young man I did a “so-so” job using a stick welder. Later in life, in the late 80’s I purchased a new TIG welder made by Miller and looking back, because of my limited knowledge and experience, my purchase was a waste of money. I do not wish to repeat this. I do not remember the model but it weighed about 350 pounds. It had a high frequency foot control and also came equipped with a stinger, cups and various size tungsten rods. It could be changed from AC to DC with the flip of a switch and polarity was also easily changed. Settings were made by rotating a large knob.

I attempted to use this machine for filling pitted areas when restoring old firearms by using TIG. I was told that TIG used less heat and would be right for the job. Frankly, I did a poor job and reverted to torch welding using 3 ½% Nickel steel rod. I was never able to weld aluminum. My attempts at welding aluminum culminated in a mess.

Once again I have the “hots” to own a welder. I have absolutely no idea if I should consider purchasing a MIG or TIG. From my limited experience with a TIG, I am thinking a MIG (with the ability to attach a stinger) would be a better choice though admittedly I have zero experience with a MIG. When watching non-trained personnel use a MIG, it seems they have little problems as compared to those I experienced when attempting TIG. I desire to choose a system that’s “forgiving” requiring only a slight learning curve. TIG can be quite complicated though very handy if accomplished in the art of TIG welding.

Given my limited experience and desired applications as described above (with an emphasis on welding aluminum), what system should I be considering ….. MIG or TIG?

Shop space could be a problem so size of the welder is a consideration as well as the ability to easily relocate the welder if need be. I will have other questions regarding choice of metal spools for MIG.

Your wisdom would be greatly appreciated.

Harold

radkins
12-13-2008, 09:32 AM
A MIG is generally easier to use but a TIG is not exactly hard to master so I would suggest you make the choice based on what intend to use it for, I assure you that you can learn to use either one.

Phil McCrackin
12-21-2008, 09:13 PM
MIG or TIG?

Doesn't matter, because once you get the bug, you will end up with both. LOL

I love my TIG. It's a Thermal Arc 185 and it has been great. I really like TIG welding, so I am biased. TIG also requires patience and a learning curve.( and in my case, classes at the local college). I would have gone Blue, if I could have afforded it(Dynasty 300DX)

I do have a Miller-Matic 180 and I have only run about 20 feet through it. Its nice, but I hate the smoke it produces. I do most of my stuff in the basement.

TIG does not use less heat though. There is actually a larger "heat affected zone" compared to MIG.

You mentioned car body panels and then Aluminum.

For general automotive/sheet metal use, the MIG would be your best choice, but for Al,SS, Ti the TIG is generally the best choice. Although some migs can be retrofitted to use an Aluminum 'gun'.$$$$$$$

If I were stuck on a desert island I would choose the TIG, (but what would you need a welder on a desert Island for????)

Also my TIG is an inverter type machine and is very small(35 lbs), compared to a transformer machine(200 lbs).


Decisions...decisions...

macona
12-21-2008, 10:00 PM
I would get a mig machine before I would buy a tig machine. For auto body the hot welder is the Millermatic 350P. It is in fact the welder that is recommended for doing the new aluminum bodies cars. The pulse feature works great. But this is a real expensive machine!

Best machine then would be the Millermatic 252. Real good machine. has a connection on the front that a spoolmatic 15/30 spool gun plugs into. Nothing to switch over between using the regular gun and the spool gun. Hitting the trigger on either gun will switch the last settings for that gun.

Tig is precise but ungodly slow. And you need a good sized machine to do 1/4" aluminum. But with a spool gun you can really move along welding aluminum.

hwingo
12-22-2008, 02:24 AM
Hi Guys,

I have resigned to purchasing a Miller Passport Plus MIG. That will give me the biggest bang for my buck. There are a few accessories that I will add, e.g., a spool gun for aluminum. Will also need to buy a regulator and hose for Argon. Other than that, I should be "good to go" ...... for a little while.;) As I learn, I will likely require more "bells & whistles" but I will cross that bridge when I come to it.

Thanks for taking time to comment.

Harold

macona
12-22-2008, 03:44 AM
The passport is a neat little machine. I had a customer that business was to do work inside cargo ships while they were in dock. The drug the larger miller DVIs through the ship to do the welding. I turned them on the the passport and they loved it.

Cheapest place to fill the bottle will probably be a paintball supply shop. It is the same bottle as they use for paintball markers. The machine has a V/A curve designed for 100% CO2 so you might give that a try before getting 75/25. A little 5lb cylinder of CO2 is equivalent to about 40 cubic feet of AR/CO2.