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5.5 Loading the Welding Wire
1. Power "OFF" the welder.
2. Screw off the nozzle and contact tip, then turn power "ON".
3. Press the trigger, then the driver feeds the wire into the gun. Release the trigger when
welding wire exceeds past the mouth of the gun, then turn power "OFF".
4. Screw on the contact tip and nozzle.
5. Cut off the welding wire so that it extends about ¼" (6-10mm) from the contact tip.
6. Now the gun is ready for operation.
SECTION 6 – WELDING OPERATION
1. Select suitable wire and shielding gas according to the type and thickness of the work
piece (refer to related Welding Manual).
2. For Wire Speed and Voltage settings, refer to Table 6 (for MIG25-140) according to wire
type and thickness of the work piece.
3. Check the wire and then choose the polarity and decide if shielding gas should be used.
4. Connect ground clamp to the work piece and be sure the connection is in good condition
and in correct polarity.
5. With your welding helmet in position to protect your eyes, press the trigger to weld. Keep
the contact tip and the work piece in a distance of 3/16" – 3/8" (5-10mm).
6. To stop welding, release the trigger.
7. Close the valve of the gas cylinder (if the gas is used) when the welding work is finished.
Press the trigger to discharge the shielding gas inside the hose. Turn "OFF" the power
last.
Reference parameters for Aluminum welding (Table 6)
Methods
Welding Wire
of Welding
Specification
Aluminum
Welding Wire
MIG
With diameter
DC+
.030
(0.8-0.9mm)
Shielding
GAS
100%
Argon
"
"
- .035
Voltage/Wire Feed
Rate Regulation
20 gauge
1/16"
(0.8mm)
(1.6mm)
C-5
E-8
EN-11
3/32"
1/8"
(2.5mm)
(3mm)
H-l0
J-10
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