angle B (see HOLDING THE GUN - p.16) is such that the wire, and therefore the arc force, is directed more toward the metal above the weld joint. This is to help prevent the weld puddle from running downward while still allowing slow enough travel speed to achieve good penetration. A good starting point for angle B is about 30 degrees DOWN from being perpendicular to the work piece.
Figure 15. Horizontal Position
3.The VERTICAL POSITION (Figure 16) is the next most difficult position. Pulling the gun from top to bottom may be easier for many people, but in some instances it can be difficult to prevent the puddle from running downward. Pushing the gun from
bottom to top may provide better puddle control and allow slower rates of travel
speed to achieve deeper penetration. When vertical welding, angle B (see HOLDING THE GUN - p.16) is usually always kept at zero, but angle A will generally range from 45 to 60 degrees to provide better puddle control.
Figure 16. Vertical Position
]WARNING
Hot slag can cause fires and serious injury from burns! Be sure to wear protective cloth-
ing and eye gear when using the Overhead Position.
4.The OVERHEAD POSITION (Figure 17) is the most difficult welding position because gravity is pulling at the weld puddle trying to make it drip o?f the work piece. Angle A (see HOLDING THE GUN - p.16) should be main- tained at 60 degrees, the same as in the flat position. Maintaining this angle will reduce the chances of molten metal falling into the nozzle should it drip from the weld puddle. Angle B should be held at zero degrees so that the wire is aiming directly into the weld joint. If you experience excessive dripping of the weld
puddle, select a lower heat setting. Also, the weave bead tends to work better than the
stringer bead when welding overhead.
Figure 17. Overhead Position
MULTIPLE PASS WELDING
Butt Weld Joints. When butt welding thicker materials, you will need to prepare the edges of the material to be joined by grinding a bevel on the edge of one or both pieces of the metal being joined. When this is done, a V is created between the two pieces of metal, that will have to be welded closed. In most cases more than one pass or bead will need to be laid into the joint to close the V. Laying more than one bead into the same weld joint is known as a
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