Welding Procedures - Lincoln Electric Magnum PRO 100SG Operator's Manual

MAGNUM PRO 100SG
OPERATION
Read and understand this entire section before operating
the machine.
WARNING
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts such as
output terminals or internal wiring.
• Insulate yourself from the work and
ground.
• Always wear dry insulating gloves.
WELDING SPARKS can cause fire
or explosion.
• Keep flammable material away.
• Do not weld upon containers which have
held combustibles.
ARC RAYS can burn.
• Wear eye, ear and body protection.
FUMES AND GASES can
be dangerous.
Although the removal of the particulate
matter from welding smoke may reduce
the ventilation requirement, concentrations
of the clear exhausted fumes and gases
may still be hazardous to health. Avoid breathing concen-
trations of these fumes and gases. Use adequate
ventilation when welding. See ANSI Z49.1, "Safety in
Welding and Cutting", published by the American Welding
Society.
After choosing the proper welding wire for your application, load
the aluminum wire, connect the gun and cable to the welding
machine. (See Installation Section).

WElDINg PROCEDURES

1. Read and understand Arc Welding Safety Precautions located
throughout this manual and the Welding Machine's Instruction
Manual. Also for helpful hints in welding see (LTW1) the Learn
to Weld manual which is supplied with the welding machine.
2. Obtain and use the proper personal protective equipment for
welding. Connect the WORK (welding ground) cable(-) to
piece(s) being welded. Make sure gas hose from cylinder's
regulator is connected to welder's gas INLET. Open cylinder's
gas valve.
3. Connect input power to the machine.
4. Turn the machine's power switch to "on". Set wire speed and
voltage tap settings to tables which are provided in the
beginning of this section.
5. Flip toggle selector switch inside of machine to "Magnum
PRO 100SG" position. Press and hold trigger for about 5
seconds to purge hose. Be sure the Gas flow rate is set to 20
to 50 SCFH thru the spool gun.
6. Cut off the aluminum wire so that it extends about 1/4 inches
from the contact tip.
7. CTWD (Contact Tip to Work Distance): Position the gun so that
the contact tip is nominally 3/8 inches from the joint and tilted
with a push angle toward it. The aluminum wire should not
FIGURE B.1
contact the workpiece. (See figure B.1)
Travel Direction
8. Protect the eyes and pull the trigger to begin welding.
9. Adjust the hand travel speed of the gun to achieve a proper
weld. The emerging wire should stay within the molten
puddle and not overrun it. This speed also should not be so
slow that either the workpiece excessively melts, or the weld
bead becomes excessively large.
10. Release the trigger to stop welding.
B-1
OPERATION
®
10°
Contact Tip to
Work Distance
3/8" to 1/2"
(10 to 12 mm)