Walking the cup, MIG and TIG...?

[welder_guy]

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!

[A_DAB_will_do]

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 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!

[welder_guy]

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.

[Hillbilly69]

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.

[1havnfun]

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.