walking the cup.

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I saw some threads on walking the cup. When you do this are you dragging or pushing the puddle? How about on pipe welding do you push it up the joint while walking it?
Reply:Zaner2,    You are pushing the puddle when walking the cup, you are resting the back of the cup on the metal and rolling or rocking it back and forth to achive a foward travel. On pipe you start at the bottom and weld up on each side. You lay the filler rod in the vee where the pipe's are joined and if you have chosen the right size filler you do not have to move it.
Reply:An important part of cup walking is having the right sized cup, and don't stop. On carbon i'm normally around 20-30 amps hotter than free hand. It's great on pipe for S/S and carbon. But remember that the angle of the torch needs to be about 45 degrees pushing the puddle.Stephen
Reply:Originally Posted by wirehuntAn important part of cup walking is having the right sized cup, and don't stop. On carbon i'm normally around 20-30 amps hotter than free hand. It's great on pipe for S/S and carbon. But remember that the angle of the torch needs to be about 45 degrees pushing the puddle.
Reply:You can have a lot more tungsten out if you use a gas lense type cup, I normally have around 12mm stick out and bump the gas flow up to about 15 litres per minute for carbon, and 25 lpm for s/s with the real big gas lense.Stephen
Reply:You may have already seen the illustration at http://www.weldinginspectionsvcs.com/WalkingTheCup.htm . If not, check it out. The torch cup is used more like a wheel to travel the torch along its path. In some deep vee groove applications you can "push" the torch but I prefer to work it through the joint using the edges of the cup to "pull it" along the joint.Getting the correct amount of pressure can be tricky. Also, as the base metal and cup get hotter, the edge of the cup has a greater tendancy to slip. This is especiall noticable when I come over the top of the pipe.Hope this helps.Have a nice dayhttp://www.weldingdata.com/
Reply:and always weld twards yourself..never awayits like you need to see in front of the weld as well as what you just welded at the same time ...zap!
Reply:Good point Zapster, I hadn't even thought about that myself.
Reply:Originally Posted by zapsterand always weld twards yourself..never awayits like you need to see in front of the weld as well as what you just welded at the same time ...zap!