Forney 140 MP - STICK Welding Setup; Getting Ready for Stick Welding; Stick Welding Current Adjustment; STICK Welding Setup Chart

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METAL GAS NOTE
Mild Steel CO2
75% Argon + 25% CO2
Argon + CO2 + Oxygen
Argon controls spatters
Oxygen improves arc stability
Aluminum Argon
Argon + Helium
Arc stability, good fusion and minimum
spatter
Higher heat input suitable for heavy sec-
tions. Minimum porosity
Stainless Steel Argon + CO2 + Oxygen
Argon + Oxygen
Arc stability
Minimum spatter
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
gases which are the most suitable to your application.
• Select the STICK, “SMAW”function with the Selector Switch (6) on the front panel.
• Check the electrode packaging to determine the recommended polarity and connect the
Electrode holder and ground clamp to the plus and minus Dinse sockets accordingly.
• Switch the unit ON thru the ON/OFF switch (14).
• If “Local (20)” is selected set the welding current with the Left Knob (8) on the front panel and
the strike over-current value of the electric arc (Hot Start) with the Right Knob (7)
• If “Remote (20)” is selected set the welding current using the foot pedal which has to be
connected to the 7-pin connector (12). The over-current value of the electric arc (Hot Start) with
the Right Knob (7).
Adjustable Welding current:
120V input voltage: Min 20 Amp - Max 80 Amp
Regulation Knob
Left Knob Left Knob Left Knob Left Knob
Mild Steel
6013 30-35 40-70 70-80 -
7018 30-35 40-70 70-80 80
Stainless Steel
316 30-35 40-70 40-80 60-80
MATERIAL
(Wire)
ELECTRODE
TYPE
ELECTRODE DIAMETER
1/16” (1.6 mm) .0787” (2 mm) 3/32” (2.4 mm) 1/8” (3 mm)
140 MP STICK SET-UP CHART
Protective Gases Guide
STICK Welding, “SMAW”
Getting Ready for Stick Welding, “SMAW”: