[Goldhawg]

aluminum plate practice.jpg (48.45 KiB) Viewed 2346 times

I am trying to learn Tig on Aluminum and I just got a new Miller Synchrowave 210. I'm trying to start out w/Jodie's recco to get a piece of plate and just run beads. But I'm having a heck of a time getting the aluminum to quickly make a puddle, and then when I let it keep pumping in it just makes the whole sheet tend to melt. I don't have any 1/8" plate, but what I have seems slightly thicker than the 14 gauge on my measurement. My prep has been to simply wipe with acetone and wire brush manually. If you look at the pic, the small circle was a quick shot at 125A; didn't want to puddle, but it was definitely penetrating through to the other side. Right below it I went the other direction, down to 90A, and let it get hot (but never got the nice shiny puddle) and then started forcing rod into it and go. But still ugly. I am using a 3/32 Lanthanated rod, 75% balance with no pulse. I don't have a balled tip; just ground about 30 Deg per Jodie's recco. Using #7 glass lens cup w/~3/8 stickout.

Reading on other posts suggests going hotter than the 1A/.001 rule; let it shine quickly and then outrun the heat. But I just can't seem to get the initial puddle right. Should I be hotter or colder to get it started?

[Oscar]

First off have you tried to tig on steel, and if so does it give a clean, shiny puddle using the 1A/1-thou rule? If not, you may have a shielding gas issue.

If yes, then you need to use more amperage. Lo' and behold. 16ga.






14ga is thicker than 16ga obviously, so the answer should be obvious.

[xwrench]

The pic looks like a gas flow problem to me. I know it's obvious but most (all?) of us have forgotten to turn the gas on at some point. Hope this helps.
Cheers.
-Eldon

[AKweldshop]

Are you sure your on AC?

[AKmud]

If he's playing with balance, he's on AC. I agree on a gas issue. Low flow, poor coverage. Are you using pure argon??

[Goldhawg]

Well, I just got back to the plate. Still can't get it to do right. I increased the CFH to 20; I had only been using 15 with the gas lens thinking that was enough. Didn't seem to change much. In the pic in the lower "bead", I started at 125A, and could never get the "shiny face" so I just finally tried to outrun the heat across without adding any filler (going from right to left). I then waited only a half minute or so (plate was still hot) and lowered to 90A. This is the horizontal weld across right above the first. Still couldn't get initial weld "shiny", so I started going across and just left the wire in the puddle as I ran across.

Turned it over to DC and used 165A on a piece of 1/8 steel plate and it is the normal feel and weld. I should also say I have welded a couple of small aluminum pieces of trim together (using the pulse function rule of 33) and that came out reasonably nice. I'm just struggling starting on this plate.

more weld pics.jpg (67.1 KiB) Viewed 2215 times

[newschoppafowah]

I hate to be the simplest things guy, but are you sure exactly what alloy that alum is?

If you're not fighting a breeze outdoors, 15cfh of pure argon should be enough, through a lens.

I'm not trying to be condescending, just throwin' out ideas.

When I first tried to weld alum, I had gotten some weird alloy from a metal supplier who's since (for other numerous and varied reasons) fallen out of favor with me, and it was just weird stuff. I didn't know what I didn't know, so to speak, and struggled for a good long while.

Whatever the deal is, good luck and stay with it. Once you get aluminum, a lot of other things begin to make sense in a cascading sort of way.

[exnailpounder]

My 2 cts...It looks like that piece is badly crapped up as well. Can see you tried to clean it but it looks to have deeply ingrained staining. I have a small plate like it that was in a scrap pile and it won't weld for s%$t. Try some brand new shiny stuff.

[Goldhawg]

alum plate.jpg (63.82 KiB) Viewed 2156 times

Well I picked up a piece of 3/16" alum plate that was in the welding scrap pile at work today and tried it out. CLeaned w/acetone and wire brushed. Set the machine at 175A w/no pulse and it seemed to do ok. Went about an inch. Then I dialed it down to 165 (thinking that with the heat from previous inch I might go down a bit. That didn't do well at all. Its the top line in the pic. So I let it cool a bit and then I cranked up to 185A, and set it to 1 PPS to see if I could get some cadence in the filling the puddle. It definitely made a puddle, but every bit had lots of black stuff rolling around as I went. After it cooled the wire brush would clean it up, but wondering what would cause the weld puddle to have some contaminant in it.

[rick9345]

perhaps try some different high frequency AC settings , may need more cleaning action, make sure you have adequate gas flow, pure Argon

Try 190 amps,speed of torch movent to control puddle or foot pedal if using one

short arc, tip of filler needs to stay in gas shield envelope,torch angle

same old basics

[exnailpounder]

If my eyes don't fail me...I don't see any clean zone in that weld bead. That weld is an improvement over the others you tried but that piece of plate is still all crapped up to the point that acetone and a wire brush won't clean it. You can't weld through contamination on aluminum. Maybe try a flap disc to grind past that dirty stuff and get bright clean metal...use a wheel just for aluminum though or it will load and stop cutting and grinder wheels can load up so bad they will shatter.

[Oscar]

You're still not where you need to be. There is MASSIVE contamination going on, but since we can't see you actually run the bead, we can't be 100% sure where it is coming from. What I think you should do is start from the beginning. Get a nice clean piece of weldable aluminum alloy (junk pile aluminum does not guarantee weldability), and see if you can get just a SINGLE clean puddle. Not even a short bead, one single PUDDLE. It should be clean shiny, with a white etched zone around it, with absolutely NO black impurities. If you cannot attain this then there is no point in even continuing trying to run even the shortest bead because there is an underlying problem that you need to address. Remember that for aluminum you need about 1.5 - 2A per thousandths of material thickness in order to not heat soak the material and cause even further issues.

[Braehill]

Oscar,
You're saying I would need 560-750 amps to weld 3/8" (1.5-2A per.001)Aluminum? Somebody better tell my old 310 amp Dialarc HF

Len.

[motox]

len
today would be a great day for 750 amps
8 degrees here need some heat
craig

[Braehill]

Craig,
I had to take some temps about 40' up earlier and out of curiosity I shot the handrail with the temp gun and it read minus 6*F, so 750 amps would be on the menu here also.

Len

[exnailpounder]

Goldhawg...I finally got a chance to play with aluminum with my brand new Syncrowave 210. Sorry for the crappy pix but I use a tablet and its all she will do....1/4" 6061 wiped with acetone and brushed. 175 amps ,75% balance, 3/32" ceriated tungsten, 4043 filler rod, gas lens, #7 cup 20cfh. I set my balance at the Pro set and did other welds at different settings. I think the etching zone is too large at the pro set but I need more time to play. Never used an inverter but it beats my transformer hands down on aluminum. My tungsten was pretty balled by the time I did these beads hence the wide etch.

[Superiorwelding]

exnailpounder,
Those beads look great. I see consistancy and you can weld in a straight line, better than me at times Keep plying with it and post up your results.
-Jonathan

[exnailpounder]

Hey thanks Jonathan. I have gotten to use my new 210 for a total of about an hour last night and of course I had to try everything. I am stumped as to why the OP is having so much trouble as I find the 210 to be a really good alum welder. I didn't post pics to brag but to show him I have the same machine and gave my settings and hopefully help him out. I worked a long day today so I could play with my new toy all day tommorow. You know that the only difference between men and boys is the price of their toys

[weldin mike 27]

By that last statement, I should be about 12yo

[exnailpounder]

By that last statement, I should be about 12yo

I hear ya. I'm 52 going on 12. My wife bought me an a Wicked Lasers Arctic laser that will light matches and burn skin...the first thing I did was take it to the bar and burn holes in the potato chip bags and plastic cups. I can't go back there til May WTF

[weldin mike 27]

What is one supposed to use said laser for, besides what you did?

[exnailpounder]

Damned if I know Mick..We use lasers in the refineries to point out valves and such to build scaffold to but those are cat toys. It never gets old when my dog goes to her bowl and I give her a little goosw in the dirt hole with that bad boy

[GreinTime]

Damned if I know Mick..We use lasers in the refineries to point out valves and such to build scaffold to but those are cat toys. It never gets old when my dog goes to her bowl and I give her a little goosw in the dirt hole with that bad boy

I just exploded in laughter at work at that image lol

[exnailpounder]

Grein.... Its funny to watch her "tuck it in" when she gets it. It doesn't burn from a distance but it stings a bit. Its even funnier to point it at the deer that come through my yard. They chase the beam and run from it and follow it around...hours of fun. I don't know how I get anything done around here I wish I knew what Iwant to be when I grow up!

[taz]

Damned if I know Mick..We use lasers in the refineries to point out valves and such to build scaffold to but those are cat toys. It never gets old when my dog goes to her bowl and I give her a little goosw in the dirt hole with that bad boy

This reminds of something that happened 10 years ago.
I get called to this refinery to inspect a repair they made on some line.
The guy responsible to issue the permit is a total wanker and I know him from previous experience. He always tried to pass the responsibility on you by enforcing every PPE he could think of, regardless of whether they were required or even possible to use. I mean the guy wanted to you to wear a safety harness inside a distilling tower which is impossible. So in case there was an accident, he could claim it was your fault for not following directions.
So after I wait for him for more than 1 hour to write the permit and him forcing every conceivable PPE known to man, we go to the unit to show me where the repair is.
He points at a bend 20-25m high where there is absolutely no access (afterwards I learned that the guys that did the repair used a basket with a crane to reach it).
I say I am sorry I can't see where the repair is from here.
He starts describing the area "it is 6m on the right of that 10" plug valve etc"
I go "I am sorry , still can't see it. Come up with me and show me."
He goes " How am I going to get up there?"
Then I go " THEN HOW THE F*CK DO YOU WANT ME TO GET UP THERE? "
Needless to say they called a crane with a lifting basket for me to do the inspection.