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Trouble with torch

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  • Trouble with torch

    Hello ladies and gentleman - I first need to get off my chest that I am not an experienced welder by any means. Welding classes are impossible to get around here for months, so I am trying to wing it until I get enrolled in some kind of school.

    I am currently trying to weld 1/8 thick aluminum square tubing. My puddles are improving but the arc is randomly shutting off for about 1 - 2 seconds, then it will come back on for a few seconds and then shut off again. When it shuts off, the area around the puddle instantly turns black. I am using the pedal for control.

    This is really frustrating to deal with and I don't have the experience to know if it is something that I am doing. I do know that I prep the aluminum well, use clean filler and am not touching the electrode to anything. (Although I do put a ball on the tip cause someone told me it would be a good idea.) I would forever appreciate any advice that someone could offer me.

    Thanks, Paul

  • #2
    Need more info. Power unit, tungsten, gas flow rate, type of aluminum, type of joint, settings on machine, etc. more info the better.


    • #3
      Hi Paul,
      The black thing sounds like the surface is not clean or you don't have argon shielding.
      What series ali are you welding 6000?
      Is the ali anozised?



      • #4
        Sounds to me you are dipping your tungsten in the puddle.


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