Section 4 - Welding; Adjusting Spool Tension - Lincoln Electric 70112 Operating Manual

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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 455 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 wire 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 Wire Size and Type
When changing the wire 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.
IMA 603C

Section 4 - WELDING

Available Drive Rolls
Part No.
AS4449-9
AS4449-11
AS4449-8
AS4449-2
AS4449-5
AS4449-12
AS4449-6
AS4449-3
AS4449-13
AS4449-4

4.2 Adjusting Spool Tension

REDI-MIG 455 Remote
All required equipment for aluminium welding is supplied in
the optional 1.2mm Aluminium Feeding Kit (KA1440-5 to
suit REDI-MIG 360 torch or KA1440-3 to suit Magnum 400
torch).
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 (KA1441-5 to suit REDI-MIG 360 torch or
KA1441-3 to suit Magnum 400 torch).
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.
Size (mm)
0.6 - 0.8
0.8 - 0.9
0.9 - 1.2
1.0 - 1.2
0.8 - 1.0
0.9 - 1.2
1.2-1.6
0.8 - 1.0
0.9 - 1.2
1.2 - 1.6
* Standard on REDI-MIG 455 Remote.
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.
Use with
Solid Wire
Solid Wire
Solid Wire *
Solid Wire
Aluminium Wire
Aluminium Wire
Aluminium Wire
Cored Wire
Cored Wire
Cored Wire
Page 15

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