Product Manual B

19
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Select the appropriate shielding gas in accordance to material being welded and wire being used. The table below
can give you some useful indications:
METAL GAS NOTE
Mild Steel CO2
Argon + CO2
Argon + CO2 + Oxygen
Argon controls spatter
Oxygen improves arc stability
Stainless Steel Argon + CO2 + Oxygen
Argon + Oxygen
Arc stability.
Minimum splatter
Copper, Nickel & Alloys Argon
Argon + Helium
Suitable for light gauges because of low flowability
of the weld pool.
Higher heat input suitable for heavy sections
NOTE: THIS MACHINE IS NOT AN APPROPRIATE POWER SOURCE FOR WELDING ALUMINUM.
• Switch the Process SELECTOR SWITCH (1) on the front panel to the top position.
• Thread the MIG gun into the EURO CONNECT SOCKET (6).
• Connect the MIG ELECTRODE POLARITY JUMPER (9) to the appropriate DINSE SOCKET:
o Flux-cored wire welding (FCAW): Jumper to NEGATIVE (-) DINSE SOCKET (7).
o MIG Welding (GMAW): Jumper to POSITIVE (+) DINSE SOCKET (8).
• Connect the ground cable to the appropriate DINSE SOCKET:
o Flux-cored wire welding (FCAW): Ground cable to POSITIVE (+) DINSE SOCKET (8).
o MIG Welding (GMAW): Ground cable to NEGATIVE (-) DINSE SOCKET (7).
• Ensure the ground clamp has a good connection to the workpiece and is connected on clean, bare metal (not
rusty or painted).
• Load the spool of wire inside the cabinet and feed it through the WIRE FEEDER (14) into the gun (see “Installing
the Welding Wire”, page 14).
• Switch the unit ON with the ON/OFF SWITCH (11).
• Press the gun trigger to load the wire through the gun.
• Set the welding parameters:
1. Adjust wire feed speed with the RIGHT KNOB (5).
2. Adjust arc voltage with the LEFT KNOB (4).
• (GMAW only) Turn on the gas cylinder, pull the trigger to check for gas flow and adjust the flow rate.
• Bring the gun close to the workpiece and press the trigger.
Regulation Knob
Left Knob Right Knob Left Knob Right Knob Left Knob Right Knob Left Knob Right Knob Left Knob Right Knob
Mild Steel
75% Ar + 25% CO
2
.023” (0.6 mm)
ER70S-6
3 4 8 9 10 10 10 10 – –
.030” (0.8 mm)
ER70S-6
1 2 3 4 6 7 8 9 10 9
No Gas
(Flux-Cored Wire)
.030” (0.8 mm)
E71T-GS
1 1 3 3 5 5 7 7 10 10
Stainless Steel
90% He + 7.5% Ar
+ 2.5% CO
2
.030” (0.8 mm)
ER308L
7 6 8 9 10 10 – – – –
CANNOT WELD ALUMINUM
MATERIAL
(Wire)
GAS
WIRE ø
MATERIAL THICKNESS
22 Gauge
.030” (0.8 mm)
16 Gauge
1/16” (1.6 mm) 1/8” (3 mm) 3/16” (5 mm) 1/4” (6 mm)
140 MP MIG SET-UP CHART
Gas Selection
Setup for MIG (GMAW) & Flux-Cored Wire (FCAW) Welding