Parweld XTT-182 DV Operator's Manual page 8

Torch starting in Lift TIG mode
Ensure the gas supply is switched on to the machine. Briefly contact
the tip of the tungsten electrode down onto the work piece with the
torch at around 70 from vertical. Depress the trigger to start the gas
0
flow and switch on the power, lift the torch up from the work piece
to draw out an arc. To prevent melting of the end of the tungsten the
machine will increase the output current when it detects the rise in
arc voltage as the tungsten is lifted from the work piece. At the end
of the weld release the torch trigger and the power will slope down
and switch off.
Torch starting in HF mode
Ensure the gas supply is switched on to the machine. Hold the torch
with the tip of the tungsten approx 2-3 mm from the job. Depress the
trigger to start the gas flow and switch on the power. At the end of
the weld release the torch trigger and the power will slope down and
switch off. (Note in 4T position you must press and release to start
the process and press and release again to stop the process. When
stopping in 4T mode holding down the trigger button will activate
the slope down, releasing the button will switch off the arc) when
starting the arc the HF will only fire for a few seconds so if the arc is
not started withing this tine the starting process should be repeated
by releasing the trigger and depressing again.
TIG welding guide ranges
Electrode diameter
0.040" (1.0mm)
1/16" (1.6mm)
3/32" (2.4mm)
Tungsten electrode types
Type
Thoriated 2%
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AC current DC current
(amps) (amps)
15-30
60-120 75-150
100-180 150-250
Application Colour
DC welding of mild Red
steel,
Stainless steel and
Copper
Type
Ceriated 2%
Zirconiated
Guide for selecting filler wire diameter
Filler wire diameter
1/16" (1.6 mm)
3/32" (2.4 mm)
1/8" (3.2 mm)
3/16" (4.8 mm)
The filler wire diameter specified is a guide only, other diameter
wires may be used according to the welding application.
Shielding gas selection
Alloy
Aluminium & alloys
Carbon steel
Stainless steel
Nickel alloy
Copper
Titanium
Machine setup for TIG welding
20-60
DC TIG welding
1)Connect the torch to the - connection and the gas hose to the gas
outlet.
2) Connect the trigger control plug on the torch to the trigger socket.
3) Connect the Earth lead to the + connection.
4) Set the process mode to 2T or 4T if you prefer a latching trigger
action. (Note in 4T position you must press and release to start the
process and press and release again to stop the process. When
stopping in 4T mode holding down the trigger button will activate the
slope down, releasing the button will switch off the arc)
5) Select HF start (bottom position)
6) Dial up the welding amperage required
Application Colour
DC welding of mild Grey
steel, Stainless
steel, Copper
AC welding
of aluminium,
magnesium and
their alloys
AC welding White
of aluminium,
magnesium and
their alloys
Current range
20 - 90
65 - 115
100 - 165
200-350
Shielding gas
Pure Argon
Pure Argon
Pure Argon
Pure Argon
Pure Argon
Pure Argon