Lincoln Electric IM761 POWER FEED 15M - Manual (Page 26)

• 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.
• 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 pres-
sure arm as follows (See Figure B.5a):
Aluminum wires between 1 and 3
Cored wires between 3 and 4
Steel, Stainless wires between 4 and 6
B-12 OPERATION B-12
POWER FEED 15M
INTERNAL CONTROLS
(Figure B.5)
COLD FEED/GAS PURGE SWITCH
Cold Feed and Gas Purge are combined
into a single spring centered toggle
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 rotat-
ing the
WFS knob . Cold feeding, or "cold
inching" the electrode is useful for threading the elec-
trode 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.
IDLE ROLL PRESSURE SETTING
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.
GND-B
GND-A
SPINDLE
BRAKE
2 STEP / 4 STEP
TRIGGER
COLD FEED /
GAS PURGE
FLOWMETER
PRESSURE
ARM
FIGURE B.5
COLD FEED
GAS PURGE
WARNING
ALUMINUM
OUTERSHIELD
METALSHIELD
INNERS HIELD
STEEL
STAINLE SS
CORED WIRES SOLID WIRES
6
1
3
2
5
4
FIGURE B-5a