Gas Selection; Setup For Mig, Gmaw, Flux-Cored Wire (Fcaw) Welding - Forney Easy Weld 140 MP Manual De Instrucciones

Gas Selection

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
Mild Steel
Stainless Steel
Copper, Nickel & Alloys
NOTE: THIS MACHINE IS NOT AN APPROPRIATE POWER SOURCE FOR WELDING ALUMINUM.
Setup for MIG (GMAW) & Flux-Cored Wire (FCAW) Welding
•
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 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.
MATERIAL
GAS
(Wire)
Regulation Knob
75% Ar + 25% CO
Mild Steel
No Gas
(Flux-Cored Wire)
90% He + 7.5% Ar
Stainless Steel
+ 2.5% CO
2
GAS
CO2
Argon + CO2
Argon + CO2 + Oxygen
Argon + CO2 + Oxygen
Argon + Oxygen
Argon
Argon + Helium
140 MP MIG SET-UP CHART
22 Gauge
ø
WIRE
.030" (0.8 mm)
Left Knob Right Knob
.023" (0.6 mm)
3
ER70S-6
2
.030" (0.8 mm)
1
ER70S-6
.030" (0.8 mm)
1
E71T-GS
.030" (0.8 mm)
7
ER308L
CANNOT WELD ALUMINUM
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Argon controls spatter
Oxygen improves arc stability
Arc stability.
Minimum splatter
Suitable for light gauges because of low flowability
of the weld pool.
Higher heat input suitable for heavy sections
MATERIAL THICKNESS
16 Gauge
1/16" (1.6 mm) 1/8" (3 mm)
Left Knob Right Knob Left Knob
4 8 9 10
2 3 4 6
1 3 3 5
6 8 9 10
NOTE
3/16" (5 mm)
Right Knob Left Knob Right Knob Left Knob
10 10 10
7 8 9
5 7 7
10 – –
1/4" (6 mm)
Right Knob
– –
10 9
10 10
– –
19