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7
INSTALLING SHIELDING GAS SUPPLY
A shielding Gas bottle is not included with your Eastwood MIG 250 but is necessary for welding using solid wire.
Eastwood recommends the following shielding gases or consult your wire manufacturer for their recommendations:
1.
Place the MIG 250 in its dedicated area or on a welding cart.
2.
Secure your shielding gas bottle to a stationary object or mount to
your welding cart.
3.
Remove the cap from the shielding gas bottle.
4.
Insert the large brass male fi tting on the Shielding Gas Regulator onto to
female fi tting on the shielding gas bottle.
NOTE:
Do not use white Tefl on
tape on this connection as it is a compression fi tting and does not require
it. If you have leaks, check the tank and regulator fi tting for dirt or burrs.
5.
Tighten the fi tting with a wrench until snug, do not over tighten.
6.
Connect either end of the gas line to the fi tting on the rear of the MIG 250
and wrench tighten until snug
(Fig. E)
.
7.
Check the gas line for leaks by slowly opening the valve on the gas bottle.
When welding, the valve on the bottle should be open all of the way.
FIG. x
FIG. x
Flow
Regulator
Hose feeds
to gas input
Valve
Bottle
Pressure
Gauge
Gas Flow
Output
Gauge
Wire Type
Shielding Gas
Steel (short circuit) 75% Argon / 25% CO
2
Stainless Steel
90% He / 7.5% Ar / 2.5% CO
2
(Tri-Mix)
Aluminum
100% Argon
CHANGING THE DRIVE ROLLER
The MIG 250 is set up to use 0.030" (0.8mm) wire. If a different size wire is
used, the drive roller needs to be changed. Adjust the drive roller according to
the following procedure:
UNPLUG UNIT FIRST!
1.
Open the side door of the welder to access the drive motor
(Fig. F)
.
2.
Lift the Pressure Adjuster out of the way and move the Tension Arm
away from the Drive Roller.
3.
Remove the Drive Roller Retaining Knob by turning the knob
counterclockwise.
4.
Remove the Drive Roller by sliding the outer drive roller ring off the
drive roller hub.
5.
Install the drive roller in the orientation so that the size of the wire you
are using is facing you on the side of the drive roller.
6.
Reinstall the Drive Roller Retaining Knob and fi nger tighten.
7.
Put the Tension Arm back in place and reset the Pressure Adjuster.
FIG. E
FIG. E
FIG. F
FIG. F
Pressure
Adjuster
Drive
Roller
Retaining
Knob
Tension
Arm
Drive
Roller
