Setup For Mig (Gmaw) Welding With Gas Shielded Mig Wire - Thermal Arc 181i FABRICATOR Service Manual

FABRICATOR 181i

4.09 Setup for MIG (GMAW) Welding with Gas Shielded MIG Wire

A. Select MIG mode with the process selection control. (refer to Section 4.01.12 for further information)
B. Connect the MIG torch 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 Torch to the power source. (Refer to section 4.02 Attaching the Tweco WeldSkill 180 MIG Torch).
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 welding grade shielding gas regulator/flowmeter to the shielding gas cylinder then connect the
shielding gas hose from the rear of the power source to the regulator/flowmeter outlet.
F. Refer to the Weld Guide located on the inside of the wirefeed compartment door for further information.
Before connecting the work clamp to the work 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.
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.
Positive Welding
Terminal (+)
MIG Torch
MIG Torch
Polarity Lead
Work Lead
Figure 4-13: Setup for MIG Welding with Gas Shielded MIG Wire
Operation
WARNING
CAUTION
Negative Welding
Terminal (-)
Supply Input Lead
4-12
OPERATION
A-09586_AC
Shielding Gas Hose Fitted
with Quick
Connect
Manual 0-5152