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WARNING
When the gun trigger is pressed (2 mode) or pressed and
released the first time (4 mode), the wire is at welding
voltage. The wire should never touch the case of the wire
feeder. If it does, it is possible for the wire to arc to the
case.
Any wire overrun should be avoided.
Put into 2 Step trigger mode.
Select the output voltage required to suit the job by setting
the coarse and fine rotary voltage switches. (Refer to
REDI-MIG 325 Welding Guide suggested settings).
Before beginning welding, ensure the wire protrudes from
the gun tip by approximately 10-15mm. Ensure gas is
turned on for gas shielded processes. Ensure welding
shield and other protective clothing are in place. Present
the protruding electrode just off the work. Maintain a steady
grip on the gun, protect your eyes with a welding shield,
then press and hold the gun trigger to create the arc.
If it is necessary to adjust the weld voltage, stop welding
before changing either or both of the rotary voltage
switches.
Adjust the wire feed speed as necessary to suit the job. At
the completion of the weld, release the gun trigger and pull
the gun away from the work to stop the arc.
4 Step trigger mode should only be used for long welds by
experienced operators.
4.1 Changing Electrode Size and Type
When changing the electrode size or type, ensure the wire
feed drive roll is the correct size and type for the electrode.
Wire feed drive rolls have two grooves each of different
sizes. Ensure the roll is located by the key and keyway and
firmly secured by knurled screw.
When changing to aluminium welding a new drive roll,
cable liner and contact tip should be used.
No one can learn to weld simply by reading about it. Skill
comes only with practice. The following pages will help the
inexperienced operator to understand welding and develop
this skill.
5.1 The Arc-Welding Circuit
The operators knowledge of arc welding must go beyond
the arc itself. The operator must know how to control the
arc, and this requires a knowledge of the welding circuit
and the equipment that provides the electric current used in
the arc. The circuit begins where the gun cable is attached
to the welding machine. Current flows through the gun
cable, gun, and contact tip, to the wire and across the arc.
On the work side of the arc, current flows through the base
metal to the work cable and back to the welding machine.
This circuit must be complete for the current to flow.
This machine's welding circuit has a voltage output of 45
volts DC maximum. This voltage is quite low and is only
present when the gun trigger is depressed.
To weld, the work clamp must be tightly connected to clean
base metal. Remove paint, rust, dirt or oil as necessary and
connect the work clamp as close as possible to the area
you wish to weld. This helps prevent current from going
through an unwanted path. Avoid allowing the welding
circuit to pass through hinges, bearings, electronic
components, or similar devices that can be damaged.
Always disconnect electrical devices before welding upon
them.
IMA 599B
Section 4 - WELDING
Section 5 - LEARNING TO WELD
REDI-MIG 325
All required equipment for aluminium welding is supplied in
the optional 1.2mm Aluminium Feeding Kit (KA1440-6).
When changing to cored wire welding, a new drive roll
should be used. All required equipment for cored wire
welding is supplied in the optional 1.2mm Flux Cored
Feeding Kit (KA1441-6).
Also check electrode polarity, as different processes may
require different polarities.
Note: Ensure that the correct gun liner and contact tip are
used for different wire sizes and processes. Change gun
liner as necessary. See Section 6.5 Liner Removal,
Installation and Trimming Instructions for REDI-MIG
360 Torch.
Available Drive Rolls
Part No.
Size (mm)
AS4449-9
0.6 - 0.8
AS4449-11
0.8 - 0.9
AS4449-8
0.9 - 1.2
AS4449-2
1.0 - 1.2
AS4449-5
0.8 - 1.0
AS4449-12
0.9 - 1.2
AS4449-3
0.8 - 1.0
AS4449-13
0.9 - 1.2
AS4449-4
1.2 - 1.6
* Standard on REDI-MIG 325 Remote.
4.2 Adjusting Spool Tension
The spool should stop rotating when the wire feed roll
stops. Overrun of the spool can cause the coil of wire to
unravel. The spool hub should be tensioned so that it
neither drags nor overruns. The tension can be set by
adjusting the large nut inside the hub with a tube spanner.
FUMES AND GASES
can be dangerous
Fumes and slag generated from electrodes recommended
for use with this welding machine can be toxic.
•
Avoid contact with eyes and skin.
•
Do not take internally.
•
Keep out of reach of children.
•
Follow all safety precautions found in this operating
manual.
The gun and cable assembly is held by the operator who
guides the automatically fed wire along the joint,
maintaining a contact tip to work distance of about 10 - 12
mm This is called electrical stickout. This electrical stickout
(ESO) must be properly maintained by the operator. The
electric arc is made in the gap between the work and the tip
end of a small diameter wire. When the power source is
properly set, the arc gap is maintained automatically.
Arc welding is a manual skill requiring a steady hand, good
physical condition, and good eyesight. The operator
controls the welding arc, and, therefore, the quality of the
weld made.
Use with
Solid Wire
Solid Wire
Solid Wire *
Solid Wire
Aluminium Wire
Aluminium Wire
Cored Wire
Cored Wire
Cored Wire
Page 13
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Troubleshooting
