Tweco 181i Thermal Arc Fabricator - Manual (Page 55)

Fabricator 181i
Manual 0-51 91 3-25 INSTALLATION, OPERATION AND SETUP
3.23 Setup for LIFT TIG (GTAW) Welding
A. Select LIFT TIG mode with the process selection control (refer to Section 3.10.12 for further information).
B. Connect the TIG Torch to the negative welding terminal (-). Welding current flows from the Power Source via
heavy duty bayonet type terminals. It is essential, however, that the male plug is inserted and turned securely
to achieve a sound electrical connection.
C. Connect the work lead to the positive welding terminal (+). Welding current flows from the Power Source via
heavy duty bayonet type terminals. It is essential, however, that the male plug is inserted and turned securely
to achieve a sound electrical connection.
D. Connect the TIG torch trigger switch via the 8 pin socket located on the front of the Power Source as shown
below. The TIG torch will require a trigger switch to weld in LIFT TIG Mode.
NOTE
A Thermal Arc 17V TIG torch with an 8 pin plug must be used to turn the weld current ON/OFF via the
TIG torch trigger switch to TIG weld OR a Thermal Arc Foot Control with an 8 pin plug must be used
to turn the weld current ON/OFF as well as providing remote control of the weld current.
E. Fit the gas regulator/flow gauge to the shielding gas cylinder (refer to Section 3.14) then connect the shielding
gas hose from the TIG torch to the regulator/flow gauge outlet. Note that the TIG torch shielding gas hose is
connected directly to the regulator/flow gauge. The Power Source is not fitted with a shielding gas solenoid to
control the gas flow in LIFT TIG mode therefore the TIG torch will require a gas valve.
!
WARNING
Before connecting the work clamp to the work and inserting the electrode in the TIG Torch make sure
the Electricity Supply is switched OFF.
Secure the welding grade shielding gas cylinder in an upright position by chaining it to a stationary
support to prevent falling or tipping.
CAUTION
Remove any packaging material prior to use. Do not block the air vents at the front or rear of the
Welding Power Source.
Loose welding terminal connections can cause overheating and result in the male plug being fused in
the terminal.
F. Switch the LOCAL/REMOTE switch inside the wire feed compartment to LOCAL to use
the Power Sources Amperage control or REMOTE for remote amperage using a Foot
Control.