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6
LEARNING TO WELD
6
Vertical-down Welding
Refer to Figure 11 Vertical-down welds are applied at
a fast pace. These welds are therefore shallow and
narrow and, as such, are excellent for sheet metal.
Vertical-down welds may be applied by a table which
is found in the Instruction Manual for lighter material.
Use stringer beads and tip the gun in the direction of
travel so the arc force helps hold the molten metal in
the joint. Move as fast as possible consistent with
desired bead shape.
The important thing is to continue lowering the entire
arm as the weld is made so the angle of the gun does
not change. Move the electrode wire fast enough that
the slag does not catch up with the arc. Vertical-down
welding gives thin, shallow welds. It should not be
used on heavy material where large welds are
required. Use the vertical up technique for where large
welds are required.
FIGURE 11
MACHINE SET UP FOR THE
SELF-SHIELDED FCAW PROCESS
1. See PROCESS GUIDELINES in the OPERATION
section for selection of welding wire and voltage,
and for range of metal thicknesses that can be
welded.
2. See the Application Guide on the inside of wire
feed section door for information on setting the
controls.
3. Set the “Voltage” and “Wire Speed” controls to the
settings suggested on the Application Guide for the
welding wire and base metal thickness being used.
The voltage control is marked “V” and the wire feed
speed is marked “olo.”
4. Check that the polarity is correct for the welding
wire being used. Set the polarity for DC(–) when
welding with Innershield NR-211-MP electrode.
See Work Cable Installation in the INSTALLATION
section for instructions on changing polarity.
5. When using Innershield electrode, the gasless noz-
zle may be used instead of a gas nozzle to improve
visibility of the arc.
6. Connect work clamp to metal to be welded. Work
clamp must make good electrical contact to the
work piece. The work piece must also be grounded
as stated in the “Arc Welding Safety Precautions”
at the beginning of the Instruction Manual which is
supplied with each welder.
WELDING TECHNIQUES FOR THE SELF-
SHIELDED FCAW PROCESS
Four simple manipulations are of prime importance
when welding. With complete mastery of the four,
welding will be easy. They are as follows:
1. The Correct Welding Position
Figure 12 illustrates the correct welding position for
right handed people. (For left handed people, it is
the opposite.)
Hold the gun (of the gun and cable assembly) in
your right hand and hold the shield with your left
hand. (Left handers simply do the opposite.)
When using the FCAW Process, weld from left to
right (if you are right handed). This enables you to
clearly see what you are doing. (Left handers do
the opposite.) Tilt the gun toward the direction of
travel holding the electrode at an angle as shown
in Figure 12.
FIGURE 12