MasterCraft MIG 180 Instruction Manual page 45

41
3. Lap spot method: The welding arc is
directed to penetrate the bottom and top
pieces at the same time, and along each
side of the lap joint seam. Select the
wire diameter, wire feed speed, and
tune in the wire speed for welding a
continuous bead
Instructions to be followed for spot welding
1. Select the wire diameter and heat
setting recommended above for the
intended method of spot welding.
2. Tune in the wire speed as if a
continuous weld is to be performed.
3. Hold the nozzle piece completely
perpendicular to and about 1/4" off the
work piece.
4. Pull the trigger on the torch and release
it when the desired penetration is
achieved.
5. Make practice spot welds on scrap
metal and vary the duration of time of
holding the trigger until a desired spot
weld is made.
6. Make spot welds on the actual work
piece at desired locations.
(fig 3B)
.
MIG 180 INVERTER WELDER 058-9306-4
fig 3B
MC-589306-63