LN-23P

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B-3

OPERATION

B-3

DRIVE ROLL PRESSURE

 

convenient for the particular application, and retighten

The drive roll pressure is pre-set at the factory for

the screw.

 

When welding, set the wire feeder on the floor or hang

proper feeding. If the idle roll tension must be relieved

temporarily, see the Maintenance Section for proper

it near the work area as convenient. Place the LN-23P

adjustment procedure.

 

to minimize the amount of spatter falling onto it.

 

Always avoid sharp bends and keep the gun cable

ADJUSTING WIRE FEED SPEED AND

as straight as practical.

 

VOLTAGE

 

Be sure the electrode cable, work cable, and control

Set the wire feed as specified in the procedures using

lead are connected and the power source is on.

 

the calibrated dial on the back of the LN-23P control

Press the gun trigger to feed the electrode out of the

box. When the reduced wire speed switch (mounted

on the gun handle) is in Position No. 1, the wire feed

gun. Use a visible stickout equal to the electrical stick-

speed will be that which is indicated on the dial. In

out specified in the procedures for the wire being used.

Position No. 2, the wire feed speed will be 83% of the

Position the gun with the wire just off or lightly touch-

figure indicated on the dial.

 

 

ing the work. Press the gun trigger to start the arc.

Set the voltage by adjusting the voltage control while

Once the arc is established, the gun trigger can be

welding until the voltage specified in the procedures is

released while welding. The gun trigger interlock circuit

indicated on the meter. The meter reading with the

automatically keeps the welding process on. At the end

power source on but not welding is the open circuit

of the weld, pull the gun away from the work.

 

voltage. With some power sources, this voltage may

When not welding, always store the gun in the insulat-

be significantly higher than welding voltage.

When establishing initial procedures, start with the

ed tube on the front of wire feeder.

 

While welding with one feeder of a two-feeder installa-

voltage control set near minimum. Strike an arc on

scrap steel. If the electrode gets hot but the arc fails to

tion the electrode of the second feeder is “HOT”. Only

start, increase the voltage settings until the arc can be

one feeder at a time can be used for welding. Do not

established.

 

press the gun trigger of the idle feeder while the other

 

feeder is being used since this can shut down the feed-

NEVER set the power source open circuit voltage

er being used for welding.

 

higher than 50(1) volts. The LN-23P will not feed wire

 

 

when the voltage is higher than 50(1)

volts.

 

 

When using the CV Converter or the DC-600 and inch-

 

 

ing wire (not welding) at open circuit voltages 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 welding. 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 pro- tective bars crossing the meter face in a different loca- tion.

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 socket head screw on the side of the gun, rotate the gun nozzle to the position most

(1) 45 volts on DC-600.

Page 15
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Lincoln Electric SVM176-A service manual Drive Roll Pressure, Adjusting Wire Feed Speed, Voltage, Making the Weld

SVM176-A specifications

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