Eastwood MIG 90 Assembly And Operating Instructions Manual page 13

SET-UP THE MIG 90 FOR FLUX CORE WELDING
The Eastwood MIG 90 comes factory set-up to weld with Solid Wire and Shielding Gas.
Flux Core does not require shielding gas.
Three changes to the Set-Up need to be made to MIG Weld with Flux Core wire:
- Reverse polarity from DCEP to DCEN.
- Install Flux Core wire.
- Position Drive Roller to accept Flux Core wire.
CHANGING THE POLARITY TO DCEN FOR WELDING WITH FLUX CORE WIRE
To use a Flux Cored wire, the Polarity of the short Integral Ground Connection Lead [g]
attached to the Front Panel must be reversed (Fig 12).
ELECTRIC SHOCK CAN CAUSE INJURY OR DEATH!
Disconnect Welder from power supply before beginning.
• Disconnect the Short, Integral Ground Connection Lead [g] from the Positive (+)
Connection Receptacle [f] by rotating the Rubber Insulator 1/2 turn Counter-
Clockwise and pulling outward.
• Align the key of the brass ferrule with the notch of the receptacle at the 12:00
position, then insert the Lead [g] onto the Negative ( - ) Connection Receptacle
[h], seat fully and rotate 1/2 turn Clockwise to lock (FIG 12).
• Insert and lock the Ground Clamp Cable into the (+) Positive Connection
Receptacle [f] (FIG 12).
POSITIONING DRIVE ROLLER FOR WIRE SIZE
The Eastwood MIG 90 Wire Drive Roller has twin grooves to accommodate both
0.023" [0.6mm] and 0.030"/ [0.8mm] wire.
The MIG 90 Drive Roller is factory set and up ready to use 0.023" (0.6mm) solid wire.
IMPORTANT NOTE: In this position, the narrower, 0.023"/ [0.6mm grove is outboard,
under the wire while the 0.6 marking for the narrower 0.023" [0.6mm] wire is visible
on the outward face of the Drive Roller.
To Clarify; The stamped marking on the side of the drive roller indicates the size of the
groove on the opposite side of the roller (FIG 13).
The groove furthest from the drive motor is the groove that will be used. If setting up
to use larger 0.030" [0.8mm] wire, the "0.8" stamping should be facing the user
when installing it.
Reverse the drive roller position according to the following procedure:
• Open the top door of the Welder to access the drive motor compartment.
• Rotate the Pressure Adjuster out of the way then pivot the Tension Arm away
from the Drive Roller (FIG 14).
• Loosen and remove the Drive Roller Retaining Knob (FIG 14).
• Remove the Drive Roller and view the wire sizes stamped on each side of
the Roller.
• Install the Drive Roller on the square drive, in the proper orientation with the
chosen wire size stamping facing outward (FIG 13).
• Reinstall the Drive Roller Retaining Knob on the shaft.
• Replace the Tension Arm and re-latch the Pressure Adjuster.
To order parts and supplies: 800.343.9353 >> eastwood.com
FIG. 12 FIG. 12
FIG. 13 FIG. 13
FIG. 14 FIG. 14
13