Fluxcore Wire Welding, "Fcaw; Mig Welding, "Gmaw; Aluminum Welding; Arrangement For Welding With A Spool Gun - Forney 190 MP Operating Manual

Fluxcore Wire Welding, "FCAW"

• Connect the ground cable to the positive terminal of the
Polarity Change Board inside the spool compartment.
• Connect the working cable to the negative terminal of
Polarity Change Board inside the spool compartment.

MIG Welding, "GMAW"

• Connect the ground cable to the negative terminal on the
Polarity Change Board inside the spool compartment
• Connect the working cable to the positive terminal of the
Polarity Change Board inside the spool compartment.

Aluminum Welding

The machine needs to be set up as follows:
• 100% ARGON as welding protective gas.
• Ensure that your torch is set up for aluminum welding:
1. The length of the torch cable should not exceed 10' (it is advisable not to use longer
torches).
2. Install a Teflon wire liner. Follow the instructions for changing the renewing of the wire
liner.
3. Use contact tips that are suitable for aluminum wire and make sure that the diameter of
the contact tip hole corresponds to the wire diameter that is going to be used.
• Ensure that drive rolls are suitable for aluminum wire.

Arrangement For Welding With a Spool Gun

WARNING: Electric shock can kill! Always turn the POWER switch OFF and unplug the power
cord from the AC power source before installing wire.
Before installing any welding wire into the unit,
the appropriate drive roll must be placed into position
on the wire drive mechanism. Ensure the groove is the
proper shape and size for the wire being used. Adjust
the drive roll according to the following steps:
1. Open the wire drive cover on the spool gun.
2. Remove the drive tension by loosening the
tension adjusting screw and lifting the drive
tension adjustor up, away from the drive
tension arm. Pull the drive tension arm away from the drive roller.
3. If needed, loosen the tension adjusting screw on the drive tension arm. Pull the drive tension
arm up to allow access to the drive roll within the wire drive system. Rotate the black drive
roll cap counterclockwise and remove it to reveal the metallic drive roll. Pull the drive roll
off its shaft. NOTE: The drive roll has two wire size (.030" and .035") grooves built into it.
Ensure the corresponding groove and wire size are used. Replace the drive roll onto its shaft
and drive roll cap onto the drive roll.
4. Find the side of the drive roller that is stamped with the same wire diameter as that of the
wire being installed. Push the drive roller onto the drive roller shaft, with the side stamped
with the desired wire diameter facing you.
5. Reinstall the drive roller cap and lock in place by turning it clockwise.
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