Tweco 550i Transmig - Manual (Page 42)

TRANSMIG 350i, 450i, 550i
INSTALLATION, OPERATION AND SETUP 3-22 Manual 0-5205
3.10 Setup for TIG (GTAW) Welding With Gas Shielding
A. Remove all packaging materials. Do not block the air vents at the front or rear of the Power Source.
B. 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.
C. Connect the optional TIG Torch (refer to table 2-2 optional accessories) 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.
CAUTION
Loose welding terminal connections can cause overheating and result in the male plug being fused
in the terminal.
!
WARNING
Before connecting the work clamp to the work piece 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 suitable
stationary support to prevent falling or tipping.
D. Position a gas cylinder on the rear tray of the Power Source and lock securely to the Power Source cylinder
bracket with the chain provided. If this arrangement is not used or the Power Source is not fitted with a
gas cylinder tray then ensure that the gas cylinder is secured to a building pillar, wall bracket or otherwise
securely fixed in an upright position.
E. Select LIFT TIG mode with the process selection control button.
F. Connect the TIG Torch trigger switch / remote control to the 10 PIN socket on the Power Source as ap-
plicable. The TIG Torch will require a trigger switch to operate in LIFT TIG mode.
G. Fit the gas regulator and flowmeter to the gas cylinder then connect the gas hose from the TIG Torch to
the Flowmeter outlet. 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.
Negative Welding
Terminal (-)
Work Lead
Positive Welding
Terminal (+)
10 Pin Control Socket Tig Torch A-10640_AB
Figure 3-9: Setup for TIG (GTAW) Welding with Gas Shielding