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WELDING GUIDELINES (CONTINUED)
Weld Angle
Weld angle is the angle at which the nozzle is held during
the welding process. Using the correct angle ensures proper
penetration and bead formation. As different welding positions
and weld joints become necessary, nozzle angle becomes an
increasingly important factor in obtaining a satisfactory weld.
Weld angle involves two positions - travel angle and work angle.
TRAVEL ANGLE is the angle in the line of welding and may vary
from 5º to 45º from the vertical, depending on welding conditions.
WORK ANGLE is the angle from horizontal, measured at right
angles to the line of welding.
For most applications, a 45º travel angle and 45º work angle
is sufficient. For specific applications, consult an arc welding
handbook.
Wire speed
The wire speed is controlled by the knob on the front panel. The
speed needs to be "tuned" to the rate at which the wire is being
melted in the arc. Tuning is one of the most critical functions of
wire feed welding. Tuning should be performed on a scrap piece of metal the same type and thickness as
that to be welded. Begin welding with one hand "dragging" the torch nozzle across the scrap piece while
adjusting the wire speed with the other hand. Too slow of speed will cause sputtering and the wire will
burn up into the contact tip. Too fast a speed will also cause a sputtering sound and the wire will push into
the plate before melting. A smooth buzzing sound indicates the wire speed is properly tuned. Repeat the
tuning procedure each time there is a change in heat setting, wire diameter or type, or work piece material
type or thickness. For Aluminum, wire speed is typically set higher (7-9 speed range).
Base
Metal
Normal Heat,
Wire Speed,
Travel Speed
Heat Too Low
Figure 7 - Weld Appearance
Heat Too High
Wire Speed
Too Fast
12
5° - 45°
Work Angle
5° - 45°
Travel Angle
Figure 6 - Weld Angle
Travel Speed
Too Fast
Travel Speed Too Slow
Wire Speed Too
Slow
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