Tweco 181i Thermal Arc Fabricator - Manual (Page 51)

Fabricator 181i
Manual 0-51 91 3-21 INSTALLATION, OPERATION AND SETUP
3.20 Setup for MIG (GMAW) Welding with Gas Shielded MIG Wire
A. Select MIG mode with the process selection control. (Refer to Section 3.10 for further information)
B. Connect the MIG Gun Polarity Lead to the positive welding terminal (+). If in doubt, consult the electrode
wire manufacturer. 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. Fit the MIG Gun to the Power Source. (Refer to section 3.07 Attaching the Tweco Fusion 180A MIG Gun).
D. Connect the work lead to the negative welding terminal (-). If in doubt, consult the electrode wire manufacturer.
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.
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 rear of the Power Source to the regulator/flow gauge outlet.
F. Refer to the Weld Guide located on the inside of the wirefeed compartment door for further information.
G. Switch the LOCAL/REMOTE switch inside the wire feed
compartment to LOCAL to use the Power Sources Wirespeed and
Voltage controls.
H. Switch the MIG GUN/SPOOL GUN switch inside
the wire feed compartment to MIG GUN.
!
WARNING
Before connecting the work clamp to the work make sure the Electricity 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.
CAUTION
Loose welding terminal connections can cause overheating and result in the male plug being fused in
the terminal.
Remove any packaging material prior to use. Do not block the air vents at the front or rear of the
Welding Power Source.