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metal build-up and minimal
penetration is acceptable. Always
select the HIGH heat setting with the
burn-through method and tune in the
wire speed prior to making a spot
weld.
8.5.2. The PUNCH AND FILL
METHOD produces a weld with the
most finished appearance of the three
spot weld methods. In this method, a
hole is punched or drilled into the top
piece of metal and the arc is directed
through the hole to penetrate the
bottom piece. The puddle can fill up
the hole leaving a spot weld that is
smooth and flush with the surface of
the top piece. Select the wire
diameter, heat setting, and tune in the
wire speed as if you were welding the
same thickness material with a
continuous bead.
8.5.3. The LAP SPOT METHOD
directs the welding arc to penetrate
the bottom and top pieces, at the
same time, right along each side of
the lap joint seam. Select the wire
diameter, heat setting, and tune in the
wire speed as if you were welding the
same thickness material with a
continuous bead.
8.6 SPOT WELDING INSTRUCTIONS
8.6.1. Select the wire diameter and
heat setting recommended above for
the method of spot welding you intend
to use.
8.6.2. Tune in the wire speed as if you
were going to make a continuous weld.
8.6.3. Hold the nozzle piece completely
perpendicular to and about 1/4 inch off the work
piece.
8.6.4. Pull the trigger on the torch and
release it when it appears that the desired
penetration has been achieved.
8.6.5. Make practice spot welds on scrap
metal, varying the length of time you hold
the trigger, until a desired spot weld is
made.
8.6.6. Make spot welds on the actual work
piece at desired locations.
