Forney 140 MIG WELDER, Owner'S Manual

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Metal GAS NOTE
Mild Steel CO2
Argon + CO2
Argon + CO2 + Oxygen
Argon controls spatter
Oxygen improves arc stability
Aluminum Argon
Argon + Helium
Arc stability, good fusion and minimum splatter.
Higher heat input suitable for heavy sections.
Minimum porosity.
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.
Contact the technical service of your gas supplier to know the percentages of the different gasses
which are the most suitable to your application.
Units may be used with the standard torch.
1. Main ON/OFF switch and welding voltage adjustment:
2. Wire feed adjustment knob
To increase the wire speed, turn the potentiometer
clockwise; to decrease the wire speed, turn it counter-
clockwise. The same procedure decreases the
values on the welding parameters. Turn knob slowly.
3. Ground Clamp
4. MIG Torch/Gun
CAT# 309
120V MIG WIRE FEED WELDER
WELDING RANGE UP TO 140 AMPS
1
3
2
4
Shielding Gas Guide
Front Panel Operation
Welder Controls