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  #1  
Old 09-18-2021, 06:22 PM
HighOnWelding HighOnWelding is offline
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Default Help 250 Miller Synchrowave

I’ve use this machine over and over again it always was running as smooth as glass. The other day I had some body panels that I wanted to Tig weld together.
Set machine to 75 A and I began to weld. Here what I’ve experience:
When I hit the paddle there’s a spark jumping from work peace to tungsten it look like a spark in a car spark plug when I try include increasing amperage with the paddle it almost looked like a plasma cutter big bright flash. Without creating a weld puddle. I included a few pictures.
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  #2  
Old 09-18-2021, 07:08 PM
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Looks like no gas shield
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  #3  
Old 09-19-2021, 12:00 AM
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Quote:
Originally Posted by digger doug View Post
Looks like no gas shield
What Doug said. Turn it on, hit the pedal and listen for hissing at the torch. This is one of those things you will learn to do without thinking about it and as soon as you strike an arc and the weld is shit you know the gas is not on... And make sure you are using 100% argon, not 75/25.

PS: there are hi-freq contacts that seldom have problems and since you hear/see the "spark" it is probably not those. Maybe...
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  #4  
Old 09-19-2021, 06:47 AM
HighOnWelding HighOnWelding is offline
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Guys, please read my post… ive been welding with this machine for over 5 years now. And all of sudden it’s acting up…
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  #5  
Old 09-19-2021, 09:18 AM
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Shade Tree Welder Shade Tree Welder is offline
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Looks like no gas to me too, did your solenoid valve go bad?

Have you confirmed gas flow?
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  #6  
Old 09-19-2021, 02:01 PM
HighOnWelding HighOnWelding is offline
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Quote:
Originally Posted by Shade Tree Welder View Post
Looks like no gas to me too, did your solenoid valve go bad?

Have you confirmed gas flow?
I do feel gas coming out and yes it’s 100% argon set at 15 CFM. Do you guys think from lock of gas it would burn holes like that at a low amperage?
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  #7  
Old 09-19-2021, 02:13 PM
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Yes it does look like a Gas issue, .... are you running a water cooler?
how much gas do you have left in the bottle? ...... there is a post about water left in the bottle from hydro testing.

high voltage jumping from work to torch. I don't remember what polarity TIG is run with...... Check the polarity switch and cables for wrong polarity.

Try stick welding with 6010 rods, that may give an idea if the power supply is an issue.
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  #8  
Old 09-19-2021, 02:51 PM
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First let me say that I am not a weldor, but I do own a few welders. I recently had this same thing happen and it turned out that the screen on my gas lens was partially clogged. Put a new one on and Yay, back to normal.

TA 185, WP20, 3/32, argon(15 cfm)

Richard
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  #9  
Old 09-19-2021, 08:19 PM
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HiOnW, don't feel bad that you are getting answers for a noob because no one here yet "knows" you or your abilities. Therefore the basic answers come first...

Go through all the steps setting the machine up--what polarity is the torch set to? DC+, DC- or AC? Hose connections tight and not leaking? Check for leaks with soapy water. The arc is hot enough to melt metal so that not an issue. Shouldn't be needing hi-freq (the spark plug) all the time to weld steel--just for starting. You ARE welding steel body panels, correct?

Water in a tank is not uncommon. It's happened to me a few times over the years. Probably wouldn't really notice it until the tank gets low.
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TA Arcmaster 185 w/tig/stick kit
MillerMatic 252 w/3rd gen 30A
MM140 w/o AS, w/CO2
Hobart (Miller) 625 plasma
Hobart 250ci plasma
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TA 95 lunchbox w/tig
45ACP Black Talons for those stubborn jobs...
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  #10  
Old 09-20-2021, 09:11 AM
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I would agree that it’s probably a gas issue too. I’ve had problems when the tank gets low too. Had bad gas/ contamination in the gas itself when the tank ran low. In doubt, try a different tank if possible.

Otherwise check torch cup for contamination, and flow of gas.

Otherwise, try a different piece of steel that you know has been cleaned and prepped for tig welding. If you do not start with good clean materials, you will have a bad time.

Also, is your torch set to DC-?


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