Thermal Arc 181i FABRICATOR Service Manual page 36

FABRICATOR 181i
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 operate in Lift TIG Mode.
If the TIG torch has a remote TIG torch current control fitted then it will require to be connected to
the 8 pin socket. (Refer to section 4.01.8 Remote Control Socket for further information).
E. Fit the welding grade shielding gas regulator/flowmeter to the shielding gas cylinder then connect the
shielding gas hose from the TIG torch to the regulator/flowmeter outlet. Note that the TIG torch shielding
gas hose is connected directly to the regulator/flowmeter. The power source is not fitted with a shielding
gas solenoid to control the gas flow in TIG mode therefore the TIG torch will require a gas valve.
Before connecting the work clamp to the work and inserting the electrode in the TIG Torch make
sure the mains power 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.
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.
Positive welding
terminal (+).
MIG Torch
polarity lead
not connected.
Work lead
Operation
NOTE
WARNING
TIG Torch
Figure 4-15: Setup for TIG Welding
4-14
CAUTION
A-09588_AD
Connect to shielding gas
regulator/flowmeter
Negative welding
terminal (-).
Note: This 8 pin
connection plug is for
TIG torch trigger
connection and remote
TIG torch current
control if applicable.
OPERATION
Manual 0-5152