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Erratic arc

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Re: Erratic arc

Postby Rudy Ray » Thu Feb 09, 2017 7:13 pm

^^^^^^
I have put a sharpened 3/32 stainless rod in place of tungsten once, it just made a mess of everything. Go figure.
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Re: Erratic arc

Postby MosquitoMoto » Thu Feb 09, 2017 7:25 pm

OP -

The first thing I'd try would be to switch back to all standard torch fittings and have a go.

Another idea...do you have a friend with a Tig rig? Can you take your torch setup to him/her and see if it works with their machine?
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Re: Erratic arc

Postby Rick van winkle » Thu Feb 09, 2017 7:50 pm

Thanks for all the ideas so far guys. I remived the torch body from the line and i can easily blow through the torch body and the torch hose with my mouth. The flared connection where the torch nut threads onto the hose looks perfect. I dont have any friends who mess with tig at all so im alone on that. Im thinking ill buy another torch head and standard collett setup to go in it and see where that gets me. Even if they arent the problem it wont hurt to have extras.
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Re: Erratic arc

Postby Rick van winkle » Thu Feb 09, 2017 7:51 pm

Rudy Ray wrote:^^^^^^
I have put a sharpened 3/32 stainless rod in place of tungsten once, it just made a mess of everything. Go figure.


Just to be safe i did double check and ive got the blue stripe on the end still.
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Re: Erratic arc

Postby Least honorable » Fri Feb 10, 2017 7:10 am

Noticed you said you put a gas lens kit after, then it started welding all weird, not beforehand, so 2 things one of which might solve your problems, at my school I was welding with 20cfh and had no problem without a gas lens, when I went to put my own gas lens on it the arc was basically doing what its doing to you, and then I turn on the preflow to like 10s so I can feel the gas, on my palm, and it felt like a gust of wind, no doubt was probably 60-80 cfh, had to put the flowmeter on 3-5cfh for it to act like it was on 20. This was in fact on an an old torch, but might still apply to your case, and having too much gas can be just as bad as having none. So if you want, try to go back with your old setup without the gas lens, see if that might fix it.

As for your collet problem, pretty sure you've figured it out but just in case, I'd you use solid collets, they will virtually never twist (by solid I mean ones with no slit)

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Re: Erratic arc

Postby noddybrian » Fri Feb 10, 2017 4:39 pm

If the problem only started with fitting a gas lens can we see a picture of how you have it fitted ? unless you managed to find the elusive 1piece teflon insulator you fit the one in the gas lens kit WITH the original otherwise there will be a gap where it meets the torch body & atmosphere will be sucked in giving issues like you describe - happens quite often - there are several recent other posts covering it.
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Re: Erratic arc

Postby exnailpounder » Fri Feb 10, 2017 5:50 pm

noddybrian wrote:If the problem only started with fitting a gas lens can we see a picture of how you have it fitted ? unless you managed to find the elusive 1piece teflon insulator you fit the one in the gas lens kit WITH the original otherwise there will be a gap where it meets the torch body & atmosphere will be sucked in giving issues like you describe - happens quite often - there are several recent other posts covering it.

I don't use that teflon insulator and I have never had a gas issue. The gas lens threads into the torch handle, and the ceramic cup threads onto the body of the gas lens so how is it possible to draw in air? Through the cup threads? That is the only way it can do it. It has never been clear to me how people are having leaks without using this mystery insulator. On my torch, when the cup is threaded onto the gas lens, there is a small gap but someone needs to explain to me why my torch has never leaked or drawn in air. I have never had a gas problem with this torch or the torch on my other machine that was set up the same way.
20170210_154115.jpg
20170210_154115.jpg (38.13 KiB) Viewed 105 times

The gas is routed through the torch handle and through the gas lens where it passes through the screen and out the cup. The only way air could be drawn in is if the cup was very loose.
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Re: Erratic arc

Postby Rick van winkle » Fri Feb 10, 2017 7:16 pm

noddybrian wrote:If the problem only started with fitting a gas lens can we see a picture of how you have it fitted ? unless you managed to find the elusive 1piece teflon insulator you fit the one in the gas lens kit WITH the original otherwise there will be a gap where it meets the torch body & atmosphere will be sucked in giving issues like you describe - happens quite often - there are several recent other posts covering it.


I stopped by my lws on the way home today. Bought some new collets and bodies to go back to my old setup. They also loaned me a torch to try. I just tried the new standard collett setup in my old torch. The problem is still there but the arc is a little more stable but if i try to puddle its instant porosity and sparks. So i put their new loaner torch head on my hose and the issue doesnt change. They sent me a hose too but its doesnt have the right connections for my machine. So i guess the next step is try a new hose? I did move my hose to make it a little neater when i was installing the collett body so maybe a bad connection in the hose is why my arc is a kittle better today? I do have the special teflon washer its part of the weldmonger kit i bought.


I must have explained the situation a little oddly in my first post. The problem started with the standard collet body setup and i bought the gas lens kit to try and fix it. I originally had just asumed the collett was damaged somehow when i overheated it. That and the collett body being seized in it meant i had to replace it anyway.
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Re: Erratic arc

Postby Rick van winkle » Fri Feb 10, 2017 9:04 pm

The picture of gas lens setup as requested. Is this right?
Image
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Re: Erratic arc

Postby exnailpounder » Fri Feb 10, 2017 9:21 pm

Yessir! You can see in the pic of my torch that my front insulator is shorter and there is a gap but it has never caused a problem. If you can get her welding, you will love the gas lens. Let us know if you figure it out. Pick up a couple shorter tail caps when you hit the LWS. Very cheap and they come in handy getting in tight spots. Save those stubby little tungstens too...you can use them down to the nub,
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