Tig or Mig
TIG is the ultimate welding rig. The equipment is expensive, can be used to weld anything weldable (alum, steel, titanium, etc), is infinitely more controllable than any other method, and is also capable of doing the thinnest to the thickest pieces. But, it is difficult to master and fairly unforgiving. The prettiest welds are usually TIG.
I can personally get by with MIG, but have no hands-on experience with TIG. I have worked around and designed stuff for both systems. So...I prolly don't know squat.
your final decision on a welder should depend on its intended use... If you plan on doing primarily heavy welding (1/4" and up...farm equipment, heavy plate and angle iron) then a stick welder will serve you well, although a hi amp wire machine will work also. You're looking at the 200 amp and up work there
If you plan on light gauge projects, sheet metal work, body repair then I'd say a MIG machine would serve you better. Light gauge tubing, 1/8" plate... body repair... that type of thing..
thickenss will also determine the amperage you need.. for all light gauge work like body sheet metal and such you can do with a 110 volt machine 90-110 amp welding current. (up to about 1/8" with limited duty cycle ...at most 15 seconds of each minute can be spent welding)
For 1/4" and down anything between a 100 - 200 amp machine will serve you well. (ALTHOUGH you'll be pushing the duty cycle of a lower amp welder on thicker metal) Lots of car guys look in the range of 175-190 amp ...both lincoln and miller offer them.
Heavy stuff... 200 or better..
My opinion of Harbor Freight welders.....import junk.. although you can get good deals on name brand tools there sometimes, it's basically an outlet for low quality tools...
Stick with a name brand... Miller, Hobart, Lincoln... you can always get replacement parts...even on weekends and they have good service reps...
I have a Hobart "suitcase" welder, 100 amp 110 volt for light stuff and it does a great job using either gas or flux core. For larger material I have a Millermatic 200. A 200 amp 220 volt machine that will handle anything else I tend to stick together.. I normally run both on GMAW...(gas metal arc welding... with bare wire) only using flux core for outside windy conditions. (the wind blows the shielding gas away). Flux core wire needs more clean up than GMAW It tends to splatter more.
I also have a Lincoln 225 amp ac/dc stick welder that I haven't turned on for several years since I bought the wire machines..
I think wire welding is a lot easier to master than stick and much easier to see and control your weld puddle.
I bought both of my machines used.. from welding houses that had leased them out then refurb'd them and sold them... you can get some really good deals if you're patient (?). Check with some of the supply houses and watch the "Machinery and Equipment" column in the classifieds. Craiglist is also a source.
Anything over 175 amps will probably require 220 volt service so plan on that expense also (if you can't do it yourself. )
Safety equipment.. A good helmet with the proper shield.. You can get away with lighter gloves with wire welders... but with stick, get some good heavy welding gloves. A fire extinguisher close by and readily accessable is a must as well as a bucket of water for cooling your welds. Clamps, pliers, vice grips and a BFH are almost a necessity. Wear long sleeves and long pants that are not tucked into your boots.. no sneekers... hot metal goes thru them like...well hot metal !! and you get to do that original dance called the 'welder with hot metal in his shoe !!! every rendition is unique and dang funny...
Additional costs to add to the purchase price.... the purchase of or rental of a gas bottle with shielding gas... usually a 75/25 argon/co2 mix... size determines $$$$$... and the cost of a flow meter that actually regulates the shielding gas flow rate...
as for TIG... it's the fancy-smancy welders choice... does the very best, most critical, have to be perfect welds... the users are artists with many hours of practice time and walls full of certifications. The machines are expensive as are consumables... and they are dang persnickity about cleanliness and weld prep... this is what you use when there is an inspector coming around shortly with his portable x-ray machine... much more than the average home shop welder needs... unless you are like 49willard and steal them
.. BTW willard ??? I'd like two at that price, please...all these words add up to "Your Choice" , but MIG is the best all around machine IMHO
hope it helps
john
Last edited by jniolon; Mar 26, 2007 at 04:13 PM.
Thanks a bunch, I really value the advice of those on this forum because collectively, every thing has been seen, done, or screwed up and fixed (the most effective way to learn).
Most appreciated, Jim.
Jim.
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Last edited by ky509; Mar 27, 2007 at 12:30 AM.
I bought my Lincoln Mig some 5-6 years and it was supposed to be ideal for welding sheet metal. I've used it extensively in that time frame and found it to be much easier to weld than with my old stick welder, in fact, I only use the stick welder when I have to weld thicker than 1/4" material. I have over the last few years heard alot of negative comments regarding how much more brittle the Mig welds are compared to Tig welds. So with the knowledge of all the sheetmetal bodywork in front of me, about a month ago, I purchased a Lincoln Tig welder. In the paast month since I purchased it I've spent a little time practiceing with it. Let me tell you, welding with a Tig is much more difficult than with a Mig. At this point in time I can get better looking welds with the Mig. I expect this to change over time but I'm not there yet. One thing nice about the Tig is that there is next to no splatter unlike with the Mig. One negative with the Tig is that because you have to use both hands and one foot to weld the process lends itself more to what I would call bench top or jig setup welding. Whereas the Mig can be used in and around the chassis or body because all you need is to point and shoot with one hand. For me the jurys still out on the Tig, but, at this point in time I would have to recommend a 220V Mig by Lincoln or Miller as the best investment you could make in a welder.
For those with Tig machines, if you get the chance or the extra money buy a torch with the slide switch on the handle instead of the foot pedal, so you can stop trying to do the pat your head and rub your belly routine.
nothing at all wrong with gas welding sheet metal if you are proficient at it. Custom bodymen will often use it over Mig if they don't have access to a Tig. Biggest problem is it has a very steep learning curve. Have you welded aluminum with your Ox-Ac setup? with the right flux and rod it works great!












