C-7
ACCESSORIES
C-7
MAKING SPOT AND STITCH WELDS
WITH TIMER KIT INSTALLED
TO MAKE SPOT PLUG WELDS:
The SPOT WELD MODE is used to make spot plug
welds when continuous welds are not needed or to
hold thin sheet metal together prior to stitch welding or
continuous welding.
Plug welds are made by using a punch to make a 3/16"
(5mm) diameter hole in the top sheet and arc welding
through the hole into the back sheet.
1.
Punch 3/16" (5mm) holes in the top sheet.
2.
Set the SPOT/STITCH ON-TIME control to
approximately 1.2 seconds.
3.
Set the procedure for the metal thickness to be
welded.
4.
Install spot weld nozzle (if available) on gun and
press it against the top sheet so the top and bot-
tom sheets are tight together.
5.
Close trigger and hold it closed until the arc goes
out.
a.
If a spot weld nozzle is not used, smoother
welds will result by moving the welding wire in
a small circle during the weld.
TO MAKE A STITCH WELD:
The STITCH WELD MODE is used to weld thin mater-
ial when warpage and burn through are a problem.
Proper adjustment of the Spot/Stitch On-Time, Stitch
Off-Time, and arc travel speed permits welding thin
sheet metal with small welds, minimum distortion, and
no burnthrough.
1.
The SPOT/STITCH ON-TIME KNOB sets welding
time.
a.
Start with a dial setting of 0.5 seconds. Raise
setting to increase penetration and weld size.
Lower setting to reduce burnthrough and dis-
tortion.
2.
The STITCH OFF-TIME KNOB sets off time
between welds.
a.
Start with a dial setting of 0.5 seconds. Raise
setting to reduce burnthrough. Lower setting
to make weld flatter and smoother.
3.
Set the procedure for the metal thickness to be
welded.
4.
Close trigger and hold it closed for length of seam.
a.
Hold gun in one place during ON time and
move gun just beyond edge of molten metal
during OFF time.
NOTE: For smoothest welds on thinner metal, point
gun slightly toward the direction of travel.
ADJUSTABLE GAS REGULATOR
AND HOSE KIT (K586-1)
The kit can be used with CO
2
or Argon blend gas. It
includes a cylinder pressure gauge, a dual scale flow
gauge, and a gas hose to connect the regulator to the
WIRE-MATIC 250 gas inlet.
DRIVE ROLL KITS
The following drive rolls and Magnum 250L gun and
cable parts are available to feed different sizes and
types of electrodes.
WIRE-MATIC 250
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Steel Wire Sizes:
.025 - .035" (0.6-0.9mm)
.030 - .045" (0.8-1.2mm)
.045" Cored (1.2mm)
Aluminum Wire Sizes:
3/64" (1.2mm)
Part Number
M14932
M15809
S14541-052 (2 Req’d)
S17092-3/64A
