17
E N G L I S H •
User's Manual
12. Hold the Trigger down and tilt the torch
forward. Keep a constant distance between the
torch and the workpiece but do not contact it.
13. Stroke the workpiece lightly to ignite the
arc. Do not strike like a match. Never tap the
electrode wire to ignite the arc; it will damage
the electrode.
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 workpiece.
3. Place the metal portion of the welding rod
inside the jaws of the Electrode Clamp. Welding
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 weld-
ing process that uses a nonconsumable tungsten
electrode to produce the weld. The weld area is
protected from atmospheric contamination by
a shielding gas (usually an inert gas such as ar-
gon), and a filler metal is normally used, though
some welds, known as autogenously welds, do
not require it.
A constant-current welding power supply pro-
duces 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.
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
Welding
current (A)
Tungsten
diameter
(mm)
Argon flux
(L/min)
5~15
0.5
3~7
10~65
1.0
4~8
55~120
1.6
6~9
85~150
2.0
6~10
120~200
2.4
7~10
200~320
3.2
10~15
320~400
4.0
12~20
400~640
4.8
15~25
Stainless Steel Welding Parameter
Steel thickness
(mm)
Tungsten diameter
(mm)
Wire
diameter
(mm)
W
elding current
(A)
Argon flux
(L/min)
Clearance size
(mm)
Clearance form
0.6
1.0~1.6
0~1.0
15~30
4~5
1
a, b
1.0
1.0~1.6
0~1.6
25~30
4~7
1
a, b
1.5
1.0~1.6
0~1.6
50~70
6~9
1
b
2.5
1.6~2.4 1.6~2.4 65~95
6~9
1
b
3.0
1.6~2.4 1.6~2.4 90~120
7~10
1~2
b, c
4.0
2.4
1.6~2.4 110~150 10~15
2~3
c, d
5.0
2.4~3.2 2.4~3.2 120~180 10~15
2~3
c, d
6.0
2.4~3.2 2.4~3.2 150~200 10~15
3~4
c, d
8.0
3.2~4.0 3.2~4.0 160~220 12~18
4~5
d
12.0
3.2~4.0 3.2~4.0 180~240 12~18
6~8
d
GTAW head.
Copper shoe
(optional).
Electrical arc.
Filler rod.
Direction
of weld.
Power.
Shielding gas.
Contact tube.
Tungsten electrode
(non consumable).
Weld bead.
Shielding gas.
