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  1. #1

    Default 1/8 tungsten problems

    i have a Miller Maxstar 200 SD. it welds perfectly with a 1/16 tungsten ( 2%)electrode but when i switch to a 1/8, it "spatters". i just bought a new collet and it didnt make any difference. machine is set at 180 amps. using foot pedal. gas set to 20. tried two different bottles-no difference with the 1/8. the weld comes out porous like its contaminated but when i switch back to the 1/16 it welds just fine. no porosity, no "spattering". any ideas what i could be doing wrong ? possibly the machine ? thanks in advance .

  2. #2
    Join Date
    Dec 2006
    Location
    collinsville, ok
    Posts
    86

    Default

    have you tried a diferent size gas lense or cup?

  3. #3

    Default

    yes, i did try different sizes. it turned out to be bad tungsten. it was some cheap crap i bought on ebay for $5. lesson learned. thanks for your help.

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