(quoted from post at 01:00:48 11/11/18) I want a wire feed, so looks like a Mig.
(quoted from post at 15:42:20 11/12/18) David G; Several here have noted that MIG is much easier to learn and to use than TIG. That's not incorrect, but it's not the whole story, either. MIG welding is easy to do, but it's less easy to do well. By its nature MIG welding makes it easy to lay down good looking welds that have little penetration and therefore little strength. Besides getting yourself a good capable MIG welder, there are a couple of other things you should consider getting. One would be plenty of steel scrap (if steel is going to be the main metal you work on) of different thicknesses so that you can do a lot of practice welding and destructive testing. Spend time cutting test welds apart so you can see what you're getting, and beating them apart so you get a real feeling for how strong they are. The other thing I suggest that you get is a good video about MIG welding and study it. I would recommend one by Wall Mountain Welding which is both simple and comprehensive, but it's hard to find. I thought it was featured in its entire length on YouTube but it's mis-titled. It says MIG welding, but it's the one from the series about flux core welding.
I hope you find what you're looking for.
Stan
(quoted from post at 14:52:56 11/14/18) Bret4207; Your point that MIG requires clean metal is important. The metal should be bare and bright (if possible) where it's going to be welded and also where the ground clamp is placed. One thing that always puzzles me is what you bring up about the thickness of metal that a welder can weld in a single pass. It's a useful reference for comparison of different machines and different processes, but it's often treated as if it's an absolute limit. In a commercial setting, or in production, being able to complete the weld with a single pass is important. As a tool for occasional use in a home shop or on a farm it shouldn't be seen as so limiting if you have to make a second weld (or more) to complete the repair. I'm not familiar with every welding certification test, but the ones I've seen require multiple passes to completely join the test pieces. That's one of the uses where MIG outperforms stick. Every pass of stick has to be carefully chipped and wire brushed before the next one can be applied over it. There's no such requirement with MIG---each pass can go right on top of the previous one as soon as you're ready to do it. That's why it's also about fifty times as easy to patch a hole using MIG as it is using stick.
Stan
(quoted from post at 15:10:58 11/14/18) To say mig gets less penetration is
missleading at best, and
missinformation at worst. Penetration
is achieved by the welders setting and
is limited by the welders max output.
If he buys a 200+ amp welder it will he
perfectly capable of welding 1/2"
material. Most who have trouble with
penetration have bought a low output
welder. And the concern over needing
clean material for a mig is way over
blown. Just because you can burn
through rust and paint with stick does
not mean that the weld isn't
contaminated. Poor prep is poor prep
and the results are similar with just a
small advantage to stick. Where weld
strength is not critical I have welded
lots of dirty metal, including burning
through paint with mig.
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