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  • 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
    oxygen contamination. could be wrong gun angle,not enough sheilding gas,too far out with nozzle.
    2- XMT's 350 cc/cv
    1- Blue star 185
    1- BOBCAT 250
    1- TRAILBLAZER 302
    1- MILLER DVI
    2- PASSPORT PLUS
    1- DYNASTY 200 DX
    1- DYNASTY 280 DX
    1- MAXSTAR 150 STL
    1- HF-251 BOX
    1- S-74D
    1- S-75DXA
    2- 12-RC SUITCASES
    1- 8-VS SUITCASE
    2- 30 A SPOOLGUNS

    Comment


    • #3
      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.
      We depend On:
      Miller | Esab | Lincoln | Fronius
      Baileigh | Drake | Eagle | Knuth
      Victor | Harris | Smith | Bessey
      Snap-On | Hilti | Ingersoll Rand
      Burco/Koco | Onan | BobCat
      Tracker | Infratrol | AmeriCast

      We belong to or support:
      American National Standards Institute
      American Welding Society
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      • #4
        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

        Comment


        • #5
          Are you talking Mig !!

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

          Comment


          • #6
            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.
            sigpic

            Comment


            • #7
              What they said..

              If you just stop you're going to see this happen, I don't have to explain the back weave as Craig in Denver summed it up pretty good. In addition to your back weave, pull your gun away at the opposite direction with a flip of your wrist.

              Hope this helped.

              TacMig
              We depend On:
              Miller | Esab | Lincoln | Fronius
              Baileigh | Drake | Eagle | Knuth
              Victor | Harris | Smith | Bessey
              Snap-On | Hilti | Ingersoll Rand
              Burco/Koco | Onan | BobCat
              Tracker | Infratrol | AmeriCast

              We belong to or support:
              American National Standards Institute
              American Welding Society
              The Welding Institute
              Fabricators & Manufacturing Association Int'l.

              Anderson & Co. LLC
              Metal Cr
              afters

              Comment

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