Forney 125 FC Operating Manual page 20

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 workpiece.
3. The VERTICAL POSITION 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 the gun so you have
a range from 45 to 60 degrees to provide better puddle control.
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 multiple-pass weld. The illustrations below
show the sequence for tying multiple pass beads into a single V butt joint.
NOTE: When using self-shielding flux-core wire it is very important to thoroughly chip and brush
the slag off each completed weld bead before making another pass or the next pass will be of
poor quality.
Fillet Weld Joints
Most fillet weld joints on metals of moderate to heavy thickness will require multiple pass welds to
produce a strong joint. The illustrations below show the sequence of laying multiple pass beads
into a T fillet joint and a lap fillet joint.
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