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  1. #1
    Join Date
    May 2013

    Default 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. #2
    Join Date
    Feb 2012


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

  3. #3
    Join Date
    Jul 2009


    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?

    Grip it and Rip it

  4. #4
    Join Date
    Sep 2008
    Dalton, GA


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