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  1. #1
    Join Date
    Jan 2008
    Location
    Michigan
    Posts
    5

    Default The growing weld

    I did a search and could not find anything so here is my question....
    I just bought a MM180 with auto set and love the thing, when i weld it will be fine but right at the end of the weld it starts to grow like some kind of mutant weld. When i grind the "mutant" weld its hollow inside so its kinda like a bubble.

    All my metal is clean new metal, its not rusty or oily or anything...
    Thanks for any info everyone.
    Ken

  2. #2
    Join Date
    Dec 2007
    Location
    alabama
    Posts
    746

    Default

    oxygen contamination. could be wrong gun angle,not enough sheilding gas,too far out with nozzle.
    2, XMT's 350 cc/cv
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    1, TRAILBLAZER 302
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    2, 12-RC SUITCASES
    2, 30 A spoolguns

  3. #3
    Join Date
    Aug 2007
    Location
    So. Cal
    Posts
    335

    Default What do you do?

    When finishing your weld do you simply stop or do you back weave? If your bead run is good than your settings are probably good.
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  4. #4
    Join Date
    Jan 2008
    Location
    Michigan
    Posts
    5

    Default

    back weave? sorry i dont know what that is. and yes when i come to the end of my weld i do just stop. should i turn the gas up? im running at bout 20.
    ken

  5. #5

    Default Are you talking Mig !!

    If you don't keep the Mig bead moving when you stop there is a mutant bubble.

  6. #6
    Join Date
    Jan 2008
    Location
    Colorado
    Posts
    673

    Arrow back'em up

    back weave: when you get to the end of the bead, don't quit. Reverse direction and weld back over your bead about 1/2".
    RETIRED desk jockey.

    Hobby weldor with a little training.

    Craftsman O/A---Flat, Vert, Ovhd, Horz.

    Miller Syncrowave 250.

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