Shielding Gas Supply (For The Gas Metal Arc Welding Process); Gun And Cable Installation; Output Polarity Connection - Lincoln Electric REDI-MIG 325 Remote Operating Manual

1.3 Shielding Gas Supply (For the Gas Metal
Arc Welding Process)
Refer "Safety in welding and cutting" - ANSI Standard Z49-
1 and WTIA Technical Note 7, available from the Welding
Technology Institute of Australia.
Obtain cylinder of appropriate type shielding gas for the
process being used.
CYLINDER may explode if
damaged
1. Set gas cylinder on rear platform of the machine. Hook
chain in place to secure cylinder to rear of welder.
2. Remove the cylinder cap. Inspect the cylinder valve for
damaged threads, dirt and dust. For cylinders having an
external thread fitting, remove any dust and dirt from the
threads with a clean cloth.
DO NOT ATTACH THE REGULATOR/FLOWMETER IF
OIL, GREASE OR CYLINDER VALVE DAMAGE IS
PRESENT. OIL OR GREASE IN THE PRESENCE OF
HIGH PRESSURE OXYGEN IS EXPLOSIVE! Inform your
gas supplier of this condition.
3. Stand to one side away from the outlet and open the
cylinder valve for an instant. This blows away any dust or
dirt which may have accumulated in the valve outlet.
WARNING
Be sure to keep your face away from the valve outlet
when "cracking" the valve.
4. Inspect the regulator/flowmeter for damaged threads and
seals, dirt and dust. Remove dust and dirt with a clean
cloth.
DO NOT USE THE REGULATOR/FLOWMETER IF
DAMAGE IS PRESENT! Have an authorised repair station
repair any damage.
WARNING
Gas under pressure is explosive. Always keep gas
cylinders in an upright position and always keep chained
to undercarriage or stationary support. Refer "Safety in
Welding and Cutting" - ANSI Standard Z49-1 and WTIA
Technical Note 7 available from the Welding Technology
Institute of Australia.
5. Attach the regulator/flowmeter to the cylinder valve and
tighten the union nut(s) securely with a spanner.
6. Attach the machines inlet gas hose to the outlet fitting of
the regulator/flowmeter, and tighten the union nut securely
with a spanner.
7. Before opening the cylinder valve, turn the regulator
adjusting knob counter-clockwise until the adjusting spring
pressure is released.
WARNING
Never stand directly in front of or behind the
regulator/flowmeter when opening the cylinder valve.
Always stand to one side.
8. Open the cylinder valve slowly a fraction of a turn. When
the cylinder pressure gauge pointer stops moving, open
the valve fully.
9. The regulator/flowmeter is adjustable. Set it for the flow
rate recommended for the procedure and process being
used before starting to weld.
IMA 599B

1.4 Gun and Cable Installation

Turn the welder power switch off before installing gun and
cable.
The REDI-MIG 4 MIG gun and cable provided with the
machine has a factory fitted 0.9-1.2mm liner and a 1.2mm
contact tip.
1. Lay the cable out straight.
2. Make sure all pins on the gun cable connector are
aligned with the proper mating sockets on the front
panel gun connector and then join the connectors and
tighten the hand nut on the gun cable connector.
Note: If a gun and cable other than the supplied gun is to
be used, it must conform to standard European-style
connector specifications. See diagram under.
The gun trigger switch must be capable of switching 10
milliamps at 60 volts DC—resistive.
The gun trigger switch connected to the gun trigger
control cable must be a normally open, momentary
switch. The terminals of the switch must be insulated
from the welding circuit. Improper operation of, or
damage to, the machine might result if this switch is
common to an electrical circuit other than the machine
trigger circuit.

1.5 Output Polarity Connection

Turn the welder power switch off before changing polarity.
The REDI-MIG 4D is connected to the REDI-MIG 325
Remote power source via a control/electrode/gas cable
assembly. The electrode cable is connected to the required
output stud inside the tool storage area of the REDI-MIG
325 Remote power source.
The control cable connects to the plug in the tool storage
area of the REDI-MIG 325 Remote power source, below
the output studs.
The gun polarity can be changed by placing the electrode
cable to the required output stud in the tool storage area,
eg. for electrode (-)ve, connect the electrode cable to the
(-)ve output stud.
Connect the work lead to the other output stud.
(See connection diagrams Page 11).
REDI-MIG 325
WARNING
CAUTION
WARNING
Page 9