Operation – Lincoln Electric LN-25 SVM179-B User Manual
Page 18
OPERATION
B-4
B-4
LN-25™ PRO
CASE FRONT CONTROLS
(See Figure B.1)
1. ANALOG VOLTMETER
The analog voltmeter shows the voltage between
electrode and work. The voltmeter shows open cir-
cuit voltage when the wire feeder is not welding. As
a result, it is not unusual to see the needle “pegged”
when not welding. The voltmeter is polarity insensi-
tive and the range is 0 - 40VDC.
2. WIRE FEED SPEED KNOB
The large, calibrated wire feed speed knob makes
for easy and accurate adjustment of the wire feed
speed. The knob rotates 3/4 turn. Turn the knob
clockwise to increase the wire feed speed, and
counter clockwise to reduce the wire feed speed.
Models with analog voltmeters have a calibrated
scale printed around the wire feed speed knob using
"in/min" units. A separate decal with "m/min" units is
included with these models wire feeder. Units with a
range switch have two calibrated scales.
Wire Feed Speed, CV Operation
When Across the Arc models are operated with CV
power sources, the wire feed speed will remain a con-
stant value, independent of arc voltage changes, as
long as the arc voltage does not drop below the mini-
mum values per the following table.
TABLE B.1 - CV OPERATION
1
1
2
3
2
3
4
4
5
5
6
6
7
K2613-1 & K2613-2
K2613-5 & K2613-7
FIGURE B.1
ITEM
DESCRIPTION
1.
Analog Voltmeter
2.
Wire Feed Speed Control
3.
5-Pin Gun Trigger Receptacle
4.
Work Sense Lead Connector
5
Thermal LED (Motor Overload)
6.
Polarity LED
7.
Wire Feed Speed Range Switch
Minimum
Arc Voltage
Maximum WFS
(Standard)
Maximum WFS
(Extra Torque)
15 V
280”/min.
210”/min.
17V
340”/min.
235”/min.
21V
440”/min.
400”/min.
24V
520”/min.
400”/min.
27V
600”/min
400”/min.