Cold Feed / Gas Purge Switch, Light Switch, Heater Switch, Pressure Arm Adjustment - Lincoln Electric POWER FEED 25M Operator's Manual

B-41
COLD FEED/GAS PURGE SWITCH
Cold Feed and Gas Purge are com-
bined into a single spring centered tog-
gle switch.
To activate Cold Feeding, hold the
switch in the UP position. The wire drive
will feed electrode but neither the power source nor
the gas solenoid will be energized. Adjust the speed
of cold feeding by rotating the WFS knob. Cold feed-
ing, or "cold inching" the electrode is useful for thread-
ing the electrode through the gun.
Hold with toggle switch in the DOWN position to acti-
vate Gas Purge and let the shielding gas flow. The
gas solenoid valve will energize but neither the power
source output nor the drive motor will be turned on.
The Gas Purge switch is useful for setting the proper
flow rate of shielding gas. Flow meters should always
be adjusted while the shielding gas is flowing.
LIGHT SWITCH
Turn the internal light switch ON to
illuminate the inside of the POWER
FEED™ 25M.
HEATER SWITCH
Turn the heater switch ON to warm
the inside of the POWER FEED™
25M. The heater is useful for reduc-
ing condensation build-up on the
spool of wire. The heater is thermo-
statically protected.
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OPERATION
COLD FEED
GAS PURGE
ON
LIGHT
OFF
ON
HEATER
OFF
POWER FEED™ 25M
PRESSURE ARM ADJUSTMENT
ELECTRIC SHOCK can kill.
• Turn the input power OFF at the weld-
ing power source before installation or
changing drive rolls and/or guides.
• Do not touch electrically live parts.
• When inching with the gun trigger, electrode
and drive mechanism are "hot" to work and
ground and could remain energized several sec-
onds after the gun trigger is released.
• Do not operate with covers, panels or guards
removed or open
• Only qualified personnel should perform mainte-
nance work.
------------------------------------------------------------------------
The pressure arm controls the amount of force the drive
rolls exert on the wire. Proper adjustment of pressure
arm gives the best welding performance.
Set the pressure arm as follows (See Figure B.18):
Aluminum wires
Cored wires
Steel, Stainless wires
FIGURE B.18
1
3 2
FLUX CORE
Cored wires
ARC WELDING
5
B-41
between 1 and 3
between 3 and 4
between 4 and 6
Aluminum wires
ALUMINUM
4
GAS METAL
Steel, Stainless wires
6
ARC WELDING