Gas Selection; Setup For Mig, Gmaw, Flux-Cored Wire (Fcaw) Welding - Forney 220 MP Operating Manual

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
METAL
Copper, Nickel & Alloys
NOTE: THIS MACHINE IS NOT AN APPROPRIATE POWER SOURCE FOR WELDING
ALUMINUM.
Setup for MIG (GMAW) & Flux-Cored Wire (FCAW) Welding
•
Press the PROCESS SELECTOR BUTTON on the front panel to the top position.
• Connect the MIG gun into the EURO CONNECT SOCKET.
•
Connect the MIG ELECTRODE POLARITY JUMPER (8) to the appropriate DINSE SOCKET:
o Flux-cored wire welding (FCAW): Jumper to NEGATIVE (-) DINSE SOCKET.
o MIG Welding (GMAW): Jumper to POSITIVE (+) DINSE SOCKET.
• Connect the ground cable to the appropriate DINSE SOCKET:
o Flux-cored wire welding (FCAW): Ground cable to POSITIVE (+) DINSE SOCKET.
o MIG Welding (GMAW): Ground cable to NEGATIVE (-) DINSE SOCKET.
• 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 into the gun (see "Installing the
Welding Wire", page 14).
• Switch the unit ON with the ON/OFF SWITCH.
• Press the gun trigger to load the wire through the gun.
• Set the welding parameters:
1.
Adjust wire feed speed with the RIGHT KNOB.
2.
Adjust arc voltage with the LEFT KNOB.
• (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
MIG (GMAW)
Thickness
Wire
Polarity
Diameter
ER70S-6 .030"
Solid Wire DCEP
AR75%/CO25% .035"
E71T-GS .030"
Flux-Core DCEN
No Gas .035"
.030"
ER4043
Aluminum DCEP
.035"
100% Argon
GAS
CO2
Argon + CO2
Argon + CO2 + Oxygen
Argon + CO2 + Oxygen
Argon + Oxygen
GAS
Argon
Argon + Helium
220 MP MIG SET-UP CHART
18GA (1.2mm) 16GA (1.6mm) 14GA (2.0mm)
16-17 150-175 17-18 220-250 17-18
16-17 140-160 17-18 180-220 17-18
- - - - 14-15
- - - - 14-15
- - 14-16 320-340 15-17
- - - - 14-16
CAN WELD ALUMINUM WITH SPOOL GUN
WWW.FORNEYIND.COM
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
Use Spool Gun for MIG
1/8" (3.2mm) 3/16" (4.8mm)
250-340 17.5-19 300-350 18-19 330-400
240-260 18-19 280-300 18-19 320-340
165-190 14-15 190-215 15-16 220-235
145-155 14-15 175-185 15-16 205-215
360-380 22-24 450-480 24-26 490-520
260-290 21-22 350-400 23-24 430-450
NOTE
NOTE
1/4" (6.4mm) 5/16" (7.9mm) 3/8" (9.53mm)
- - - - -
21-22 360-380 21-22 400-420 23-24
- - - - -
15-16 220-230 16-17 235-245 16-17
- - - - -
24-25 350-375 - - -
-
420-520
-
245-255
-
-
19