Lincoln Electric IM867 PIPELINER LN-23P - Manual (Page 12)

B-2 OPERATION
PIPELINER ® LN-23P
B-2
ADJUSTING WIRE FEED SPEED AND
VOLTAGE
Set the wire feed as specified in the procedures using
the calibrated dial on the back of the LN-23P control
box. When the reduced wire speed switch (mounted
on the gun handle) is in Position No. 1, the wire feed
speed will be that which is indicated on the dial. In
Position No. 2, the wire feed speed will be 83% of the
figure indicated on the dial.
Set the voltage by adjusting the voltage control while
welding until the voltage specified in the procedures is
indicated on the meter. The meter reading with the
power source on but not welding is the open circuit
voltage. With some power sources, this voltage may
be significantly higher than welding voltage.
When establishing initial procedures, start with the
voltage control set near minimum. Strike an arc on
scrap steel. If the arc fails to start, increase the volt-
age settings until the arc can be established.
When inching wire (not welding) at open circuit volt-
ages below 20 volts or above 25 volts, feeding may
be unsteady or the wire speed may vary from that set
on the dial. This condition does not exist while weld-
ing. Minimum usable arc voltage is 14 volts.
NOTE: For improved readability of the voltmeter in
some applications, the voltmeter guard may be
installed rotated end for end. This will result in the
protective bars crossing the meter face in a different
location.
MAKING THE WELD
Be sure the proper contact tip for either .068" or 5/64"
wire, as appropriate, is in the gun. The thread protec-
tor should cover the external threads on the nozzle.
Loosen the insulated screw on the side of the gun,
rotate the gun nozzle to the position most convenient
for the particular application, and retighten the insulat-
ed screw.
When welding, set the wire feeder on the floor or
hang it near the work area as convenient. Place the
LN-23P to minimize the amount of spatter falling onto
it. Always avoid sharp bends and keep the gun
cable as straight as practical.
Be sure the electrode cable, work cable, and control
lead are connected and the power source is on.
Press the gun trigger to feed the electrode out of the
gun. Use a visible stickout equal to the electrical stick-
out specified in the procedures for the wire being
used.
Position the gun with the wire just off or lightly touch-
ing the work. Press the gun trigger to start the arc.
Once the arc is established, the gun trigger can be
released while welding. The gun trigger interlock cir-
cuit automatically keeps the welding process on. At
the end of the weld, pull the gun away from the work.
When not welding, always store the gun in the insulat-
ed tube on the front of wire feeder.