Lincoln Electric IM408 MAGNUM SG SPOOL GUN - Manual (Page 19)

The procedure settings below can be used to
make a test weld when the spool gun is used
with a Lincoln model SP-150, SP-200 or
SP-250 power source:
7. Re-engage wire drive by pushing release lever to
down position.
8. Momentarily squeeze trigger and verify that wire
feeds properly. Trim wire to approximately 1/4" (6
mm) from end of contact tip.
(1) Dial not calibrated when used with spool gun.
Making A Weld
1. Check that the spool gun power, control, and gas
connections are correct for the power source being
used. Check that the gas supply is turned on. Check
wire spool for an adequate supply of wire.
2. See Part B, “Test Weld Setting”, or “Procedure
Settings”, for wire feed speed and voltage settings.
Set these controls depending on the welding wire
and base metal thickness being used.
3. Connect work clamp to metal being welded. Work
clamp must make good electrical contact to the
workpiece. The workpiece must also be grounded as
stated in “Arc Welding Safety Precautions”.
4. Connect power to welder and turn “ON”.
5. Prepare to purge gas line by first releasing wire
drive. Push wire drive release lever to the UP
position.
SP-150 SP-200 SP-250
Wire
Wire
Arc
Wire
Arc Wire Arc
Size
Speed
Voltage
Speed
Voltage Speed Voltage
in. (mm)
Dial
Setting
Dial
Coarse Fine Percentage Setting Setting (1) Setting (1)
.030 (.8 mm) 325 6.5 375 18-23 2.5 42% 15
.035 (.9mm) 300 7.0 350 18-23 2.5 39% 16
3/64 (1.2 mm) 225 7.5 250 18-23 2.5 32% 21
WARNING: Gun body and contact tip become
electrically energized when gun trigger is pressed and
remain so for several seconds after trigger is released.
6. Press and hold gun trigger for about 5 seconds to
purge gas line. If adjustable regulator or metering
valve is installed, adjust gas flow per Part B,
“Setting Gas Flow Rate”.
Release wire feed and purge gas line.
12
Unlock wire feed release
WARNING: When using an open arc process, it is
necessary to use correct eye, ear, head, and body
protection.
9. Position gun over joint at 10° pushing angle. End of
wire may be lightly touching the work.
10. Lower welding helmet, close gun trigger, and begin
welding. Hold the gun so that the contact tip to
work distance is about 1/2 inch (13 mm).
11. To stop welding, release the gun trigger and then
pull the gun away from the work after the arc goes
out.
12. When no more welding is to be done, close valve on
gas cylinder, momentarily operate trigger to release
gas pressure in line and turn off power source.
13. Note that clogged tips can often be salvaged by
peeling away melted wire.
Weld angle
and distance
Salvaging
clogged tips