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The STRINGER BEAD is formed by
traveling with the torch in a straight line
while keeping the wire and nozzle
centered over the weld joint. See following
figure.
The WEAVE BEAD used when you want to
deposit metal over a wider space than would be
possible with a stringer bead. It is made by
weaving from side to side while moving with the
torch. It is best to hesitate momentarily at each
side before weaving back the other way.
8.3 Welding position
FLAT POSITION
is easiest of the welding
positions and is most commonly used. It is
best if you can weld in the flat position if
possible, as good results are easier to
achieve.
HORIZONTAL POSITION is performed
very similarly to the flat weld except that
angle B (see HOLDING THE TORCH) is
such that the wire, directed more toward
the metal above the weld joint is to help
prevent the weld puddle from running
downward while still allowing slow enough
travel speed. A good starting point for
angle B is about 30 degrees DOWN from
being perpendicular to the work piece.
VERTICAL POSITION It is easier for many
people to pull the torch from top to bottom.
It can be difficult to prevent the puddle
from running downward. Pushing the torch
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 TORCH) is usually
always kept at zero, but angle A will
generally range from 45 to 60 degrees to
provide better puddle control.
OVERHEAD POSITION is the most
difficult welding position. Angle A (see
HOLDING THE TORCH) should be
maintained at 60 degrees. Maintaining this
angle will reduce the chances of molten
metal falling into the nozzle. 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.
