I have the chance to get a Multiprocess 200 at discount, used.
What I do:
Lots of steel furniture fabrication, lighter wall tube typically. Right now I use my Miller Passport and its been great. But I would like the ability to start doing TIG welding on both steel and other metals (mostly Al, maybe SS).
So... should I get a Miller Multi 200 to start my TIG learning and expand my fab envelope, or should I wait and get a dedicated TIG machine that isnt a compromise later?
The price might be around $600 for a used machine w/ basic package and good shape. No TIG gun or accessories.
If I do decide to jump into TIG my starter budget would be $1000+/-...
NO... separate tig machine....
I was in a similar boat about 10 months ago. I wanted a tig to weld alum, because the first DC tig machine I bought wouldn't do it. (bought a cheap no name on a whim). helium and DCEP can be done, but it is not practicle or affordable to a hobbiest.
I weld a lot of aluminum intakes and aluminum blowers that are cast. a 200 amp machine will weld quite a bit of stuff that is out there and is probably the most common sized unit sold. I have always been a red and blue fan. welded production sprayarc and dual shield flux core with a miller 451 and a 325 for years.
I've owned a Lincoln 225 AC/DC tombstone stick welder since the 90's and have welded aluminum with it. I don't recommend it. its not clean, its very time consuming, appearance is hideous at best, and its very expensive. (25-30 bucks a pound). the flux is a complete nightmare for multiple passes.
anyways, I have a Lincoln 185 mig and have basically abused it without issues so I went right to the local welding shop and started poking around. the squarewave 200 "seems" like a decent welder for 1449 on sale. until you start researching some of its features. then the crappy pedal it comes with, then the regulator that needs changed to a flow meter. a new person leaning tig welding doesn't need a bunch of negatives right off the bat.. then.... you find out the duty cycle is only 25% and it isn't made in the USA.
so you go over to the miller store and check theirs out. the closest thing you get is the diversion 185 for more money than the Lincoln 200 squarewave. then you find out it also isn't made in the usa and the duty cycle on this one ***** also. duty cycle is important when you're welding 1/4" and bigger aluminum without preheating...so you look at the Dynasty 200... the prices goes way up.....
so you step back and research some more. you try out a couple offshore units. you realize that red and blue fans hate green and yellow welders. "made in china junk" no parts availability" they ****, blah blah blah.
so that aside... I talked to some local aluminum welding shops to see what they ran. MAC trailers in ohio.... EAST manufacturing in ohio. both make high end ALUMINUM semi trailers. you know what brand they use? you know what brand gives them the least amount of issues? the Green ones.
So I take a step back and do some more research. I'm a red blooded, god fearing, gun toting American. "I'm not buying a Chinese welder"
Unless you are spending 8K on a welder, its not American made. you are paying for a name, and getting a lesser quality of a machine than you can elsewhere. sure, some are assembled here out of chinesium parts
Two car fab shops I know run everlast 200's daily. have for 3-4 years. lots of SS and heavy aluminum welding. its cheaper than the red and blue... it comes with better accessories, like upgraded pedal, GOOD flowmeter, better superflex torch and torch hose covers, better warranty, and twice the duty cycle.
The eastwood got knocked off the list right away. a lot of circuit board issues, low duty cycle, some pretty poor reviews when they were used for more than a weld here and a weld there.
I looked hard at the AHP200 and the everlast 200DV. I decided on the everlast due to a lot of the features. the starting amps goes way lower on the everlast. not so much for aluminum, but welding thin SS, it helps, a lot. it comes with better accessories, when you figure in the add ons to the AHP, the everlast is cheaper and its a commercially built unit. its meant for commercial use, not a weekend warrior.
since I was welding aluminum primarily with this... I decided to step up to the 255DX. Same controls, same basic machine but more amperage and the ability to add a water cooler down the line. Only downfall was 208 only (vs 208/110 on the 200DV for portability) I couldn't be happier. Blue fans hate them, red fans hate them. I like green anyways.
Couple features I think is needed on these newer inverter machines when welding aluminum is balance and freq. Not all units have these features, and when dealing with different types of aluminum, especially dirty cast. 2t/4t and upslope downslope most people wont mess with, but they are handy when you start tinkering with pulse, which is another beauty once you figure it out. sorry for the long rant, but picking one out is hard, learning to weld without any kind of guidance or instruction is harder. I'm so glad now I didn't settle for an older transformer machine.
Take a class or get some starter lessons from someone that welds will put you light years ahead of the learning curve. watching videos helps, but is nothing like having someone there to tell you what you are doing wrong . the ahp or 200dv everlast would make a great machine for you. obviously I prefer the green. not sure on current prices but they should be 12-1300 range. call them directly for a better price and get upgrades thrown in.