What machine to start with

By Digger1799 Date 11-06-2005 02:40

Hi All,

I am new to this. I haven't welded in years, but want to learn Tig welding as I have a lot of aluminium projects I'd like to do. In my job I would need an Arch welder so from what I am learning a TIG welder will do both for me.

My question: Where do I start, which machine is best for me. My requirements are to be able to weld 1/20" up to 1/4" aluminium and up to 1/2" steel. I don't see a need to weld anything as thin as a tin can, but welding Stainless steel sheets would be nice to do for hobby stuff.

The alu welding I need to do is for tool rack on my trailer and in my shop. Ladder Racks, Trailer Toung boxes, parts bins etc.

SO I just keep getting more and more confused as to which machine or what my actual requirements are. I plan on taking classes at a local trade school to learn the basics, but want a machine at home to practice with.

So what would you recommend?

By tool_man (*)

Date 11-06-2005 15:42

Hi Digger.I can only speak from personal experience but,I would suggest a squarewave tig.They are smoooth,have a wide range of adjustment capability,and can be connected to power sources ranging from 110v to 460v 3 phase without changing links.I recently purchased a Miller Dynasty 200 DX. but Lincoln also makes an inverter that I am told is pretty much equal to the Miller.The nice thing about the squarewave inverters for aluminum is you don't grind a ball on the end of the tungsten.Instead...you grind a truncated point,or just sharpen using chem sharp and flatten the point.This gives you a more focused arc.Really does a nice job on aluminum.Expect to pay about $3000 for a complete set up.I don't know if that is out of your price range.If so,you might want to look for a used tig on E-bay.Pay close attention to the amp range.Some don't adjust below 20 amps.This will limit your ability to weld thin metals.Also pay attention to the duty cycle.Some are pretty low.
Just my 2 cents.I invite opposing views.

By Cat Mechanic (*)

Date 11-06-2005 22:56

For doing 1/4" alum, I'd look for something in the 250 amp range at least. I've got a Lincoln Squarewave 175, it's a good machine but it's a little light for 1/4". I have welded 1/4" but I've also overheated my welder doing it. I thought the 175 would be perfect but I find it to be a bit small. Better to have more capability than what you need instead of wishing you had more(like me!).
Hope this helps,
Jim