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Les gray Posted on Mar 05, 2015
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How do What is the cable configuration for tig welding aluminium and amps,volts also the tungsten burns away because it glows white hot

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  • Posted on May 02, 2016
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First of all, make sure your machine is capable of welding aluminum. Must be AC, high frequency capable with some sort of remote amperage control--such as a foot pedal.

Second, make sure your tig torch is hooked up electrode negative. Otherwise, your tungsten will just melt away as you describe.

Third, stay within the amperage limits of the diameter tungsten you are using. The higher the amperage, the thicker the tungsten. For most general purpose welding, a 3/32 tungsten will be fine.

Forth, make sure you have adequate argon gas shielding. 15-20 cfh should be plenty.

Finally, use the proper tungsten for the work. This also depends on the machine you're using. For decades, pure tungsten has been recommended for welding aluminum. This is not the case with the invert machines. I recommend using 2% lanthanated tungsten for everything. That way you don't have to stock various types of electrodes depending on what you are welding on. The 2% lanth works for AC and DC, no problem.

Good luck.

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  • Posted on Mar 05, 2015
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Depends on the thickness and quality of the aluminum.

Are you sure the GAS is on?

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What is the difference between TIG & MIG welding?

MIG welding is also called Metal inert gas welding, gas metal arc (GMAW) welding. MIG welding uses an arc of electricity that creates a short circuit amidst a constant anode and a cathode. The short circuit produces heat and a non-reactive gas. This melts metal, enabling it to be mixed together. After the heat is removed, the metal cools down and then solidifies, creating new fused metal. MIG wire is used in MIG welding. Tungsten inert gas (TIG) welding utilizes a non-consumable tungsten electrode that produces the electric arc for the weld. Unlike MIG welding, TIG welding does not require additional metal to be added.
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What polarity do I use for tig welding aluminum, and what color electrode for miller hf-p dial arc

Your dialarc HF has a selector for polarity, DCEP (electrode positive), DCEN (electrode negative) and AC. DC TIG welding is done in DCEN only with the high frequency turned to start. When welding aluminum, you must be in AC with the high frequency turned to continuous. Other machines may be different, but that setup will be how you need to set that dialarc HF.

The old school tungsten recommendation has always been the green or pure tungsten when welding aluminum on AC with a transformer machine, which is what you have. However, pure tungsten will not be a good choice for inverter style machines or when welding other metals besides aluminum. So instead of having multiple types of tungsten running around in your tool box, I use the blue or 2% lanthanated tungsten for everything. I find that it has excellent arc characteristics on both AC and DC, you can also sharpen it to a point when welding on AC, which is very useful in directing the arc when tacking up your aluminum job or starting out at low amps.
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Lincoln precision tig 225. Makes bad aluminum welds in AC. Welds show signs of contamination. Have tried new argon bottle. No leaks in gas lines. Using pure and 2% thoriated tungsten, 3/32, pure...

Hello; Make sure AC Auto Balancing is Enabled; And when Welding Aluminum Aways use 100% Pure Green Coded Tugsten.Make Sure you dont have 75/25 or possibly if you know for sure your frequency balancing on your machine is working you could possibly have a bad bottle of gas try the bottle of gas on the machine that you say that runs good if it runs good put it back on the 225 if the problems still exist there is something wrong with your machine`s Ac high freqency Auto Balancing.Make sure all connections are good,check tig head for loose connections. Step Up to A 1/8 size tugsten it will carry more heat and gets less contanimated.Every time you stick your tugsten it will run contanimated untill you burn it off or clean it ,if you stick you tugsten go ahead and put a clean piece back in the tig head, Contanimated tugsten wil run dirty for 5 to 20 minutes Untill you BURN it Back Clean !?
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I am welding 19 gage steel. WHAT DO I SET THE MACHINE AT. Seams to burn hole before start my pass

You want to set the lever to DCEN and set the amperage at perhaps 40-45 amps (this will be the max when the pedal is fully depressed). I suppose we need to know what gas you are using but I would suggest using Argon. Sneak into the melting point - too few amps is not going to kill the job, so gradually depress the pedal until you find that magic combination of heat input and speed.

It would also be very helpful to know what tungsten you are using and at what diameter. I would suggest using 1.5% Lanthium or Ceriated Tungsten with a diameter of at least 0.50" but not more than maybe 0.100" ground correctly to a point. You can use a larger diameter but it might just get in the way of seeing. I use 1/8" for almost everything.

For thinner metal and for less experienced weldors, it's helpful to get the weld started away from an edge. Edges melt faster so less heat input is needed. It might take a little practice.

One weldor could weld 19 gage metal with a lot more amps than another so a lot of it is up to the experience of the torch holder.
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Poor weld quality- porosity. non directional arc, dcen.

Tig need to very clean prior to weld.Stainless steel wire brush.or dics sand new disc. Argon Gas.
Tungsten needs to be ground the write way. seen Miller.com they have free info for you.How to Tig.
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How too set up a tig welder for welding thin steel?

DC current, electrode negative (DC Straight, DC-), High frequency for start only (really don't have to use high freq at all for steel but it helps establish the arc without scratching), 1 amp per thousandth of material thickness is a good setting to start, adjust from there for the job. 1 amp/thousandth also applies to aluminum- it has a lower melting point than steel but conducts heat much better so power to weld is very nearly the same.

Use a sharp tungsten, don't ball it at all (as you would for AC work).

lp
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I could not welding aluminium with Syncrowave 250DX. could you advise me on what's been missed ?

Gas, tungsten shaping,tungsten protrusion, Typeof gas grounding, gas pressure. setting on AC .
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My tungsten appers to be melting when i am welding aluminum also leaves black residue when welding

TIG TORCH MAY NOT BE RATED AT THAT AMPERAGE .MIGHT BE BETTER TO USE 1/8 PURE TUNGSTEN. BLACK RESIDUE MAY BE CAUSED THE CORROSION OF COPPER GUTZ DURING WELING ,DO TO INTENSE HEAT. OR MAYBE CAUSED BY FAILURE TO CLEAN METAL AND/OR DIPPING THE TUNGSTEN.
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Welding aluminum

TIG weding is next to brain surgery as far as CLEAN goes.
You must get your AL clean, either by 1. Clean with a NEW Stainless Steel brush or 2. by using a chemical from the welding house that is made just for that.
Your cup must be clean and your gas flowing at the right amount,no leaks in o-rings or hoses.
Hold your cup more vertical and keep your filler rod in the gas shield always,no in and out movement.
In short you must get everything perfect to get quality Heliarc Al welds.
Good luck, HowardRoark
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How to TIG Weld

TIG stands for Tungsten Inert Gas welding. Also called GTAW (Gas Tungsten Arc Welding) and Heliarc® which was Linde's trade name for the TIG process when it was introduced many years ago. The arc is started with a tungsten electrode shielded by inert gas and filler rod is fed into the weld puddle separately. A slower process than MIG, it produces a more precise weld and can be used at lower amperages for thinner metal and can be used on exotic metals. TIG does require quite a bit more time than MIG to learn. It is similar in technique to gas welding.
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