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14. When the arc ignites, tilt the electrode for-
ward and hold it near the workpiece.
NOTE: If too much current is drawn from the
welder; the Thermal Overload protector will
activate, the Overload indicator or will light,
and the welder will turn off until it cools down.
It will automatically reset.
ARC (STICK) CONNECTION
1. Connect the Electrode Clamp and Cable to
the torch control connector and twist to lock
in place.
2. Plug the cable of the Grounding Clamp into
the DC ground connector and secure the clamp
to a clean, exposed metal part of the work-
piece.
3. Place the metal portion of the welding rod
inside the jaws of the Electrode Clamp. Weld-
ing rod types vary for welding different metals.
When finished welding
a. Release the Torch handle trigger and lift
the Torch handle from the workpiece,
b. Press the Power Switch to the Off (O) posi-
tion.
c. Set the Torch handle down on the metal
workbench,
d. Turn the air supply off,
e. Unplug the line cord from the electrical
outlet.
TUNGSTEN INERT GAS (TIG) WELDING
Gas tungsten arc welding (GTAW), also known
as tungsten inert gas (TIG) welding, is an arc
welding process that uses a nonconsumable
tungsten electrode to produce the weld. The
weld area is protected from atmospheric con-
tamination by a shielding gas (usually an inert
gas such as argon), and a filler metal is normal-
ly used, though some welds, known as autog-
enously welds, do not require it. A constant-
current welding power supply produces energy
which is conducted across the arc through a
column of highly ionized gas and metal vapors
known as plasma. TAW is most commonly used
to weld thin sections of stainless steel and non-
ferrous metals such as aluminum, magnesium,
and copper alloys.
E N G L I S H •
Direction
of weld.
Filler rod.
Electrical arc.
Copper shoe
(optional).
The process grants the operator greater control
over the weld than competing procedures such
as shielded metal arc welding and gas metal arc
welding, allowing for stronger, higher quality
welds. However, GTAW is comparatively more
complex and difficult to master, and further-
more, it is significantly slower than most other
welding techniques. A related process, plasma
arc welding, uses a slightly different welding
torch to create a more focused welding arc and
as a result is often automated.
Tips for TIG Welding
Tungsten
Welding
diameter
current (A)
(mm)
5~15
0.5
10~65
1.0
55~120
1.6
85~150
2.0
120~200
2.4
200~320
3.2
320~400
4.0
400~640
4.8
U se r's m a n ua l
GTAW head.
Power.
Shielding gas.
Contact tube.
Tungsten electrode
(non consumable).
Weld bead.
Shielding gas.
Argon flux
(L/min)
3~7
4~8
6~9
6~10
7~10
10~15
12~20
15~25
17
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