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Hi Dcop, 6010 and 6011 will be the easiest rods to learn vertical welding as there a fast freeze electrode thus less chance of weldor error. The more difficult electrodes for vertical welding produce a heavy slag, ie; 6013, 7014, 7018. Vertical up welding is fairly easy to do once you get the hang of it. Electrode angle pays a very important roll, about 5º to 10º down from horizontal, 0º works best sometimes, and you need your head below the rod to see the weld puddle with a close arc length and a slightly faster travel speed. Vertical down welds are allowed by AWS code and are limited to 2" in length on fillet welds but most welds fail when ran verticle down as it's very easy to trap slag with in the molten puddle. I only recomend very experienced welders use vertical down. Learn verticle up first! Now most welders watch the "slag" in the molten puddle and not the molten puddle it's self and that causes the molten puddle to fall or the weld puddle will slump before the welder moves the rod upward. Thats why we teach you to weld flat first so you can reconize the weld puddle from the slag. If you can see the difference in the weld puddle and the slag, then do not let the slag take your attenion away from the motlen puddle in the vertical position like it does to most weldors. A vertical weave bead is made by starting a weld puddle then moving horzontial, 8 rod diameters max, then pause slightly to deposit more weld, move up 1/2 rod diameter, then back to the starting point. The horizontal move should be fairly fast so if the weld slumps in the center then your moving too slow. If the ends are under cut then your not pausing long enough at the corners. Take a stratch awl making two vertical lines will help you keep the weld straight and uniform width. The 8 times the rod diameter maximum is so the slag does not cool before you return to deposit more metal thus intraping slag with-in the molten puddle. Use your arc length and travel speed to adjust for different welding positions. There is no need to adjust amps from flat welding to overhead welding to verticle welding. This is very important too learn for when welding in a 6G position. A 6G position is a pipe fixed at 45º. T_Bone
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