7
OPERATION
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 "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, to avoid feeding
wire.
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, "Setting Gas Flow Rate".
7. Re-engage wire drive by pushing release lever to down
position to feed wire.
8. Momentarily squeeze trigger and verify that wire feeds
properly. Trim wire to approximately 1/4" (6 mm) from end of
contact tip.
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.
MACHINE INSTRUCTIONS
See your machine's manual for how to calibrate and use your
spool gun with your machine. If you don't have your machine's
manual please go to Lincoln Electric's website and find the
manual under the support section.
WARNING
WARNING
MAGNUM PRO 250 LX & LX GT SPOOL GUN
