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  1. #1
    Join Date
    Dec 2007
    Location
    Bend Oregon
    Posts
    62

    Default Walking the cup, MIG and TIG...?

    I have seen walking the cup for tig welding. I would like to try it but i have a few questions first.
    -Do I need a grove or not, if so what kind?
    -Do I need a special kind of cup?
    -Do I need to fidget with my paremeters (ie. rod, tungsten, voltage, gas)?

    And I was watching this show on the discovery chanel, Howe & Howe Tech, and they where welding a fillet T joint on fairly thick steel (probaly 1/2 inch im guessing) with MIG. But what different was how he was welding, it looked like he was holding the shielding cup at the top with his left hand and rotating the handle in circles with his right hand. Does this have a name? How do I do it?

    Thanks!
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  2. #2
    Join Date
    Nov 2008
    Location
    Troy, OH near Dayton
    Posts
    43

    Default root pass

    I watched a guy from Europe weld a pipe root pass with some metal-core(short circuit MIG transfer) a few weeks ago. He ran it using 1 hand, downhill, with the MIG gun nozzle riding the bevel. It was very similar to walking a TIG torch. Works good until spatter builds up to the point that the tip is shorted to the nozzle, at which point the nozzle welds itself to the joint....

    Quote Originally Posted by welder_guy View Post
    I have seen walking the cup for tig welding. I would like to try it but i have a few questions first.
    -Do I need a grove or not, if so what kind?
    -Do I need a special kind of cup?
    -Do I need to fidget with my paremeters (ie. rod, tungsten, voltage, gas)?

    And I was watching this show on the discovery chanel, Howe & Howe Tech, and they where welding a fillet T joint on fairly thick steel (probaly 1/2 inch im guessing) with MIG. But what different was how he was welding, it looked like he was holding the shielding cup at the top with his left hand and rotating the handle in circles with his right hand. Does this have a name? How do I do it?

    Thanks!
    Benson's Mobile Welding & Fabrication
    www.bensonmobilewelding.com
    Serving the Dayton, Cincinnati, and Columbus, OH metropolitan areas

  3. #3
    Join Date
    Dec 2007
    Location
    Bend Oregon
    Posts
    62

    Default

    Quote Originally Posted by A_DAB_will_do View Post
    I watched a guy from Europe weld a pipe root pass with some metal-core(short circuit MIG transfer) a few weeks ago. He ran it using 1 hand, downhill, with the MIG gun nozzle riding the bevel. It was very similar to walking a TIG torch. Works good until spatter builds up to the point that the tip is shorted to the nozzle, at which point the nozzle welds itself to the joint....
    I might try that. But what i saw them do was use both hands and the torch did no make contact with the metal.
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  4. #4
    Join Date
    Feb 2009
    Posts
    146

    Default

    I've tried it on flat groove welds with FCAW.

    It's like the reverse of walking the cup you have to drag it. never tried it on the cap just for fill. Dont know if I'd do it on critical work - might get lack fusion depending on the groove profile.
    Bobcat 225
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  5. #5
    Join Date
    Nov 2008
    Location
    Colorado Springs
    Posts
    276

    Default Mig Big

    I do alot of heavy plate with the Mig. 1/2" through 1-1/2"
    Spray, sheilded core and gasless
    If you are "SLAGING your DRAGING" is the rule around here.
    When we do these with reg MIG we push, backup and pause then push again.
    the slows the jack rabbits.

    Not such a good technic with flux or metal core because you can push or pull slag into the weld, so keep moving, pulling all the way.

    That's what works here, your shop may vary and probably does.
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