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Quote:

Originally Posted by Sieg (Post 543926)

Is anyone using this CK Rotary Amperage Control?

http://www.ckworldwide.com/images/rac.jpg

http://www.ckworldwide.com/amperage_controls.htm

I have it and use it often. It's great when you are not bench welding.

Quote:

Originally Posted by coolwelder62 (Post 549774)

I have some .375 alum. and Miller 200DX just won't getter done.

Get some helium and it will ;)

Quote:

Originally Posted by 358Mustang (Post 565482)

Get some helium and it will ;)

200 DX is only capable of .250 aluminum on Argon. And you're right - with Helium you could probably get it done. I got a tank once - talked like Donald Duck for a week.... didn't get much welding done. LOL

careful greg, too much of that will stunt your growth and make you walk funny.

Quote:

Originally Posted by GregWeld (Post 565494)

Hah, we do lots of very thick aluminum welding at my work. And we actually use DCEN with straight helium gas... The gas is expensive, but it is an option if you want to weld thicker aluminum on a small machine..

Quote:

Originally Posted by Vince@MSperfab (Post 565555)

careful greg, too much of that will stunt your growth and make you walk funny.

TOO LATE!!!!

Quote:

Originally Posted by GregWeld (Post 545506)

If it was easy --- your buddy RobW could do it.....
.

Hey GW, not sure what you meant by that, but, I found a shirt for you!

http://hoodratswelding.com/products/...iant=932985299

Maybe change the "and" to "I'm"...... :)

Quote:

Originally Posted by GregWeld (Post 474078)

So Sieg and I were texting back and forth.... regarding TIG welding.
.

First I cut a bunch of 5" long 1" square .50 wall tubing.... deburred it -- cleaned it with NON chlorinated brake cleaner - and scuffed it quickly with a 3" roloc disc.

The rule of thumb is ONE amp per ONE THOUSANDTH material thickness.... and since I'd been telling Sieggy the weld master to cut his amperage I figured I'd stick to that rule - so 50 amps it is....

Well.... I could hardly get a puddle going - and by the time I could get puddle and try to move it along and dab --- #1 my auto darkening helmet kept lighting up! Which blinds you momentarily - and trying to weld at this low amperage was just so SLOW.... and not a good puddle at all! It was like REALLY DUDE! YOU SUCK!!

http://i919.photobucket.com/albums/a...NG/file-16.jpg

http://i919.photobucket.com/albums/a...NG/file-11.jpg

I only held a TIG torch 3 days a week for about 9 mo. way back in 1990 so I know less than everybody here. That said ,and I'm sure I'm late to this , the problem with the puddle at 50amps was you where not welding .050" tubing together you are welding TWO EDGES of 1" .050 wall sqaure tubing. The 2 edges butted together are closer to .100 thick each and then have nice heat sinks running away from the weld (2 on each side of the weld) did you try to weld the tubes together end to end?

It's the same as doing a T weld in the middle of a plate, the "leg" acts thinner because the base has more area cooling the bead area.

Just a thought from out on the edge.

Sorry I started reading this thread then realized it was 3 years old .

Cyclone ---

I've read your post about 5 times and have yet to comprehend what you're saying. My initial thought was that you're telling someone they should add up the thickness (gauge/dimension) of both pieces you're trying to well and then set your machine accordingly. I.E., a butt weld joint - of two .125" square tubes - should be welded at 250 amps.

Dude! Couldn't be further from correct.... So I don't know what your post is trying to say because I must have missed something there.