Lincoln Electric LN-15 User manual

OPERATOR’S MANUAL
• Sales and Service through Subsidiaries and Distributors Worldwide •
Cleveland, Ohio 44117-1199 U.S.A. TEL: [phone] FAX: [phone] WEB SITE: www.lincolnelectric.com
• World's Leader in Welding and Cutting Products •
Date of Purchase:
Serial Number:
Code Number:
Model:
Where Purchased:
Copyright © 2003 Lincoln Global Inc.
LN-15 WIRE FEEDER
IM733
March, 2003
For use with machines having Code Number 10864
Safety Depends on You
Lincoln arc welding and cutting
equipment is designed and built with
safety in mind. However, your overall
safety can be increased by proper
installation ... and thoughtful opera-
tion on your part. DO NOT
INSTALL, OPERATE OR REPAIR
THIS EQUIPMENT WITHOUT
READING THIS MANUAL AND
THE SAFETY PRECAUTIONS
CONTAINED THROUGHOUT. And,
most importantly, think before you
act and be careful.
This manual covers equipment which is no
longer in production by The Lincoln Electric Co.
Specications and availability of optional
features may have changed.

FOR ENGINE
powered equipment.
1.a. Turn the engine off before troubleshooting and maintenance
work unless the maintenance work requires it to be running.
____________________________________________________
1.b. Operate engines in open, well-ventilated
areas or vent the engine exhaust fumes
outdoors.
____________________________________________________
1.c. Do not add the fuel near an open flame
welding arc or when the engine is running.
Stop the engine and allow it to cool before
refueling to prevent spilled fuel from vaporiz-
ing on contact with hot engine parts and
igniting. Do not spill fuel when filling tank. If
fuel is spilled, wipe it up and do not start
engine until fumes have been eliminated.
____________________________________________________
1.d. Keep all equipment safety guards, covers and devices in
position and in good repair.Keep hands, hair, clothing and
tools away from V-belts, gears, fans and all other moving
parts when starting, operating or repairing equipment.
____________________________________________________
1.e. In some cases it may be necessary to remove safety
guards to perform required maintenance. Remove
guards only when necessary and replace them when the
maintenance requiring their removal is complete.
Always use the greatest care when working near moving
parts.
___________________________________________________
1.f. Do not put your hands near the engine fan.
Do not attempt to override the governor or
idler by pushing on the throttle control rods
while the engine is running.
___________________________________________________
1.g. To prevent accidentally starting gasoline engines while
turning the engine or welding generator during maintenance
work, disconnect the spark plug wires, distributor cap or
magneto wire as appropriate.
i
SAFETY
i
ARC WELDING CAN BE HAZARDOUS. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH.
KEEP CHILDREN AWAY. PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING.
Read and understand the following safety highlights. For additional safety information, it is strongly recommended that you
purchase a copy of “Safety in Welding & Cutting - ANSI Standard Z49.1” from the American Welding Society, P.O. Box
351040, Miami, Florida 33135 or CSA Standard W117.2-1974. A Free copy of “Arc Welding Safety” booklet E205 is available
from the Lincoln Electric Company, 22801 St. Clair Avenue, Cleveland, Ohio 44117-1199.
BE SURE THAT ALL INSTALLATION, OPERATION, MAINTENANCE AND REPAIR PROCEDURES ARE
PERFORMED ONLY BY QUALIFIED INDIVIDUALS.
WARNING
Mar ‘95
ELECTRIC AND
MAGNETIC FIELDS
may be dangerous
2.a. Electric current flowing through any conductor causes
localized Electric and Magnetic Fields (EMF). Welding
current creates EMF fields around welding cables and
welding machines
2.b. EMF fields may interfere with some pacemakers, and
welders having a pacemaker should consult their physician
before welding.
2.c. Exposure to EMF fields in welding may have other health
effects which are now not known.
2.d. All welders should use the following procedures in order to
minimize exposure to EMF fields from the welding circuit:
2.d.1.
Route the electrode and work cables together - Secure
them with tape when possible.
2.d.2. Never coil the electrode lead around your body.
2.d.3. Do not place your body between the electrode and
work cables. If the electrode cable is on your right
side, the work cable should also be on your right side.
2.d.4. Connect the work cable to the workpiece as close as
possible to the area being welded.
2.d.5. Do not work next to welding power source.
1.h. To avoid scalding, do not remove the
radiator pressure cap when the engine is
hot.
CALIFORNIA PROPOSITION 65 WARNINGS
Diesel engine exhaust and some of its constituents
are known to the State of California to cause can-
cer, birth defects, and other reproductive harm.
The engine exhaust from this product contains
chemicals known to the State of California to cause
cancer, birth defects, or other reproductive harm.
The Above For Diesel Engines The Above For Gasoline Engines

ii
SAFETY
ii
ARC RAYS can burn.
4.a. Use a shield with the proper filter and cover
plates to protect your eyes from sparks and
the rays of the arc when welding or observing
open arc welding. Headshield and filter lens
should conform to ANSI Z87. I standards.
4.b. Use suitable clothing made from durable flame-resistant
material to protect your skin and that of your helpers from
the arc rays.
4.c. Protect other nearby personnel with suitable, non-flammable
screening and/or warn them not to watch the arc nor expose
themselves to the arc rays or to hot spatter or metal.
ELECTRIC SHOCK can
kill.
3.a. The electrode and work (or ground) circuits
are electrically “hot” when the welder is on.
Do not touch these “hot” parts with your bare
skin or wet clothing. Wear dry, hole-free
gloves to insulate hands.
3.b. Insulate yourself from work and ground using dry insulation.
Make certain the insulation is large enough to cover your full
area of physical contact with work and ground.
In addition to the normal safety precautions, if welding
must be performed under electrically hazardous
conditions (in damp locations or while wearing wet
clothing; on metal structures such as floors, gratings or
scaffolds; when in cramped positions such as sitting,
kneeling or lying, if there is a high risk of unavoidable or
accidental contact with the workpiece or ground) use
the following equipment:
• Semiautomatic DC Constant Voltage (Wire) Welder.
• DC Manual (Stick) Welder.
• AC Welder with Reduced Voltage Control.
3.c. In semiautomatic or automatic wire welding, the electrode,
electrode reel, welding head, nozzle or semiautomatic
welding gun are also electrically “hot”.
3.d. Always be sure the work cable makes a good electrical
connection with the metal being welded. The connection
should be as close as possible to the area being welded.
3.e. Ground the work or metal to be welded to a good electrical
(earth) ground.
3.f.
Maintain the electrode holder, work clamp, welding cable and
welding machine in good, safe operating condition. Replace
damaged insulation.
3.g. Never dip the electrode in water for cooling.
3.h. Never simultaneously touch electrically “hot” parts of
electrode holders connected to two welders because voltage
between the two can be the total of the open circuit voltage
of both welders.
3.i. When working above floor level, use a safety belt to protect
yourself from a fall should you get a shock.
3.j. Also see Items 6.c. and 8.
FUMES AND GASES
can be dangerous.
5.a. Welding may produce fumes and gases
hazardous to health. Avoid breathing these
fumes and gases.When welding, keep
your head out of the fume. Use enough
ventilation and/or exhaust at the arc to keep
fumes and gases away from the breathing zone. When
welding with electrodes which require special
ventilation such as stainless or hard facing (see
instructions on container or MSDS) or on lead or
cadmium plated steel and other metals or coatings
which produce highly toxic fumes, keep exposure as
low as possible and below Threshold Limit Values (TLV)
using local exhaust or mechanical ventilation. In
confined spaces or in some circumstances, outdoors, a
respirator may be required. Additional precautions are
also required when welding on galvanized steel.
5.b.
Do not weld in locations near chlorinated hydrocarbon vapors
coming from degreasing, cleaning or spraying operations.
The heat and rays of the arc can react with solvent vapors to
form phosgene, a highly toxic gas, and other irritating prod-
ucts.
5.c. Shielding gases used for arc welding can displace air and
cause injury or death. Always use enough ventilation,
especially in confined areas, to insure breathing air is safe.
5.d. Read and understand the manufacturer’s instructions for this
equipment and the consumables to be used, including the
material safety data sheet (MSDS) and follow your
employer’s safety practices. MSDS forms are available from
your welding distributor or from the manufacturer.
5.e. Also see item 1.b.
Mar ‘95

FOR ELECTRICALLY
powered equipment.
8.a. Turn off input power using the disconnect
switch at the fuse box before working on
the equipment.
8.b. Install equipment in accordance with the U.S. National
Electrical Code, all local codes and the manufacturer’s
recommendations.
8.c. Ground the equipment in accordance with the U.S. National
Electrical Code and the manufacturer’s recommendations.
CYLINDER may explode
if damaged.
7.a. Use only compressed gas cylinders
containing the correct shielding gas for the
process used and properly operating
regulators designed for the gas and
pressure used. All hoses, fittings, etc. should be suitable for
the application and maintained in good condition.
7.b. Always keep cylinders in an upright position securely
chained to an undercarriage or fixed support.
7.c. Cylinders should be located:
• Away from areas where they may be struck or subjected to
physical damage.
• A safe distance from arc welding or cutting operations and
any other source of heat, sparks, or flame.
7.d. Never allow the electrode, electrode holder or any other
electrically “hot” parts to touch a cylinder.
7.e. Keep your head and face away from the cylinder valve outlet
when opening the cylinder valve.
7.f. Valve protection caps should always be in place and hand
tight except when the cylinder is in use or connected for
use.
7.g. Read and follow the instructions on compressed gas
cylinders, associated equipment, and CGA publication P-l,
“Precautions for Safe Handling of Compressed Gases in
Cylinders,” available from the Compressed Gas Association
1235 Jefferson Davis Highway, Arlington, VA 22202.
iii
SAFETY
iii
Mar ‘95
WELDING SPARKS can
cause fire or explosion.
6.a. Remove fire hazards from the welding area.
If this is not possible, cover them to prevent
the welding sparks from starting a fire.
Remember that welding sparks and hot
materials from welding can easily go through small cracks
and openings to adjacent areas. Avoid welding near
hydraulic lines. Have a fire extinguisher readily available.
6.b. Where compressed gases are to be used at the job site,
special precautions should be used to prevent hazardous
situations. Refer to “Safety in Welding and Cutting” (ANSI
Standard Z49.1) and the operating information for the
equipment being used.
6.c. When not welding, make certain no part of the electrode
circuit is touching the work or ground. Accidental contact
can cause overheating and create a fire hazard.
6.d. Do not heat, cut or weld tanks, drums or containers until the
proper steps have been taken to insure that such procedures
will not cause flammable or toxic vapors from substances
inside. They can cause an explosion even though they have
been “cleaned”. For information, purchase “Recommended
Safe Practices for the
Preparation for Welding and Cutting of
Containers and Piping That Have Held Hazardous
Substances”, AWS F4.1 from the American Welding Society
(see address above).
6.e. Vent hollow castings or containers before heating, cutting or
welding. They may explode.
6.f.
Sparks and spatter are thrown from the welding arc. Wear oil
free protective garments such as leather gloves, heavy shirt,
cuffless trousers, high shoes and a cap over your hair. Wear
ear plugs when welding out of position or in confined places.
Always wear safety glasses with side shields when in a
welding area.
6.g. Connect the work cable to the work as close to the welding
area as practical. Work cables connected to the building
framework or other locations away from the welding area
increase the possibility of the welding current passing
through lifting chains, crane cables or other alternate cir-
cuits. This can create fire hazards or overheat lifting chains
or cables until they fail.
6.h. Also see item 1.c.

iv
SAFETY
iv

Thank You for selecting a QUALITY product by Lincoln Electric. We want you
to take pride in operating this Lincoln Electric Company product
••• as much pride as we have in bringing this product to you!
Read this Operators Manual completely before attempting to use this equipment. Save this manual and keep it
handy for quick reference. Pay particular attention to the safety instructions we have provided for your protection.
The level of seriousness to be applied to each is explained below:
WARNING
This statement appears where the information must be followed exactly to avoid serious personal injury or
loss of life.
This statement appears where the information must be followed to avoid minor personal injury or damage to
this equipment.
CAUTION
Please Examine Carton and Equipment For Damage Immediately
When this equipment is shipped, title passes to the purchaser upon receipt by the carrier. Consequently, Claims
for material damaged in shipment must be made by the purchaser against the transportation company at the
time the shipment is received.
Please record your equipment identification information below for future reference. This information can be
found on your machine nameplate.
Model Name & Number _____________________________________
Code & Serial Number _____________________________________
Date of Purchase _____________________________________
Whenever you request replacement parts for or information on this equipment always supply the information
you have recorded above.
vv

vi
vi TABLE OF CONTENTS
Page
Installation.......................................................................................................................Section A
Technical Specifications.......................................................................................................A-1
Safety Precautions ...............................................................................................................A-2
Location................................................................................................................................A-2
Work Clip Lead.....................................................................................................................A-2
High Frequency Protection...................................................................................................A-2
Weld Cable Connections......................................................................................................A-3
Electrode Connection ...........................................................................................................A-3
Work Connection..................................................................................................................A-3
Power Source Connection....................................................................................................A-3
Gun and Cable Assemblies..................................................................................................A-3
Electrode Polarity .................................................................................................................A-3
Control Cable Connections ..................................................................................................A-3
Connection Diagram.............................................................................................................A-4
Procedure to Install Drive Rolls and Wire Guides ................................................................A-5
________________________________________________________________________________
Operation.........................................................................................................................Section B
Safety Precautions ...............................................................................................................B-1
Graphic Symbols that appear on this Machine or in this Manual .........................................B-1
General Description..............................................................................................................B-2
Duty Cycle ............................................................................................................................B-2
Recommended Processes ...................................................................................................B-2
Processes Limitations ..........................................................................................................B-2
Operational Features and Controls .....................................................................................B-2
Case Front Controls .............................................................................................................B-3
Dual Procedure ....................................................................................................................B-3
LN-15 Power-Up Sequence..........................................................................................B-4, B-5
Internal Controls ...................................................................................................................B-6
Spring Tension Arm..............................................................................................................B-6
Cold Feed/Gas Purge Switch ...............................................................................................B-6
Spindle Brake .......................................................................................................................B-6
Flow Meter............................................................................................................................B-6
Shielding Gas Connection....................................................................................................B-6
Constant Current Operation .................................................................................................B-7
Setting Arc Sensing wire Feed Speed For Constant Current Operation ..............................B-8
Making a Weld......................................................................................................................B-9
________________________________________________________________________________
Accessories ....................................................................................................................Section C
Factory Installed Equipment.................................................................................................C-1
Electrode, K-Kit used ...........................................................................................................C-1
________________________________________________________________________________
Maintenance....................................................................................................................Section D
Safety Precautions ...............................................................................................................D-1
Routine Maintenance ...........................................................................................................D-1
Periodic Maintenance...........................................................................................................D-1
Calibration Specification.......................................................................................................D-1
________________________________________________________________________________
Troubleshooting .................................................................................................................Section E
Safety Precautions ...............................................................................................................E-1
How to Use Troubleshooting Guide .....................................................................................E-1
Troubleshooting Guide ...........................................................................................E-2 thru E-4
________________________________________________________________________________
Wiring Diagram & Dimension Prints .............................................................................Section F
________________________________________________________________________________
Parts Pages .............................................................................................................................P413
_______________________________________________________________________________

15-110 VDC (110VDC 5Amps Maximum)
Across the Arc Model
300 Amps 60% Duty Cycle
250 Amps 100% Duty Cycle
A-1
INSTALLATION
LN-15 ACROSS THE ARC MODEL
A-1
TEMPERATURE RANGE
OPERATION: - 40oC to +50oC (- 40oF to +104oF)
STORAGE: - 40oC to +70oC (- 40oF to +185oF)
RATED CURRENT
INPUT VOLTAGE
TECHNICAL SPECIFICATIONS – LN-15 K1870-1 (CODE NUMBER 10864)
HEIGHT WIDTH DEPTH WEIGHT
12.7 Inches 8.7 Inches 23 Inches 30lbs
(323 mm) (221mm) (584 mm) (14kg)
SPOOL SIZE CAPABILITY
8 (200mm) Dia. x 4 (100mm)
Wide Spools including
AWS 8 DIA. (10-15lbs)
JIS S-3 200mm max. (5 - 7 kg)
DIN 200 (5 kg)
ELECTRODE DIAMETERS and SPEED RANGE
PHYSICAL DIMENSIONS
Electrode Size Speed Range
0.023 - 0.052" 50 - 700 in/min
(0.6 - 1.3 mm) (1.3 - 17.8 m/min)
0.045 - 0.052" 50 - 700 in/min
(1.2 - 1.3 mm) (1.3 - 17.8 m/min)
Solid Electrode
Steel
Flux Cored
Electrode

A-2
INSTALLATION
LN-15 ACROSS THE ARC MODEL
A-2
SAFETY PRECAUTIONS
ELECTRIC SHOCK CAN KILL.
• ONLY QUALIFIED PERSONNEL SHOULD
PERFORM THIS INSTALLATION.
• TURN OFF INPUT POWER TO THE POWER
SOURCE AT THE DISCONNECT SWITCH OR
FUSE BOX BEFORE WORKING ON THIS
EQUIPMENT. TURN OFF THE INPUT POWER
TO ANY OTHER EQUIPMENT CONNECTED TO THE WELDING
SYSTEM AT THE DISCONNECT SWITCH OR FUSE BOX
BEFORE WORKING ON THE EQUIPMENT.
• DO NOT TOUCH ELECTRICALLY HOT PARTS.
• DO NOT TOUCH METAL PORTIONS OF THE LN-15 WORK
LEAD CLIP WHEN THE WELDING POWER SOURCE IS ON.
• DO NOT CONNECT THE LN-15 TO A NON-LINCOLN TIG
POWER SOURCE, A SQUARE WAVE TIG POWER SOURCE,
OR A PLASMA CUTTING POWER SOURCE.
-------------------------------------------------------------------
LOCATION
The LN-15 should be positioned upright on a
horizontal surface. Do not submerge the LN-15 in
water. The best practice is to keep the machine in a
dry environment. When using the LN-15 in severe
weather conditions, place the LN-15 on its side with
the door facing upwards. Keep the door closed.
WORK CLIP LEAD
ELECTRIC SHOCK CAN KILL.
• ONLY QUALIFIED PERSONNEL SHOULD
PERFORM THIS INSTALLATION.
• DO NOT TOUCH METAL PORTIONS OF THE
LN-15 WORK CLIP LEAD WHEN THE
WELDING POWER SOURCE IS ON. THE
WORK CLIP LEAD IS ELECTRICALLY "HOT"
TO WORK IF THE INPUT ELECTRODE CABLE TO THE LN-15
IS ELECTRICALLY "HOT", EVEN IF THE GUN TRIGGER IS
OFF. CARE SHOULD BE TAKEN TO ONLY HANDLE THE LN-
15 WORK CLIP LEAD BY ITS NONMETAL INSULATED
PORTIONS AND/OR THE WELDING POWER SOURCE
SHOULD BE TURNED OFF BEFORE HANDLING THE WORK
CLIP.
• DO NOT ATTACH THE WORK CLIP LEAD TO THE ROLL
CAGE OR SKIDS OF THE LN-15.
-----------------------------------------------------------------------------------
** The work clip lead is present only on Across-the-
Arc models.
The work clip lead attached to the front of the LN-
15 must be connected directly to the work using the
spring clip on the end of the lead.
If the work clip lead is not connected, the LN-15 will
not operate.
The work clip lead also serves as a work sensing lead
for the LN-15. If the work clip lead is extended by the
user beyond the standard 15' (4.6m) length, the volt-
meter reading will be lower than the actual arc volts
due to resistance in the extended lead. To minimize
the error, the following lead size is recommended for
the maximum extended lengths shown.
AWG Max. Length
#14 25 ft (7.6m)
#12 50 ft (15.2m)
#10 100 ft (30.5m)
#6 200 ft (61.0m)
CORRECT WORK CLIP ATTACHED TO WORK
INCORRECT WORK CLIP ATTACHED TO ROLL CAGE
HIGH FREQUENCY PROTECTION
•TO PREVENT POSSIBLE DAMAGE TO THE LN-15, DO NOT
CONNECT THE LN-15 TO NON-LINCOLN TIG OR SQUARE
WAVE POWER SOURCES. TIG HIGH FREQUENCY SHOULD
NEVER BE APPLIED TO THE LN-15.
------------------------------------------------------------------------------------------
Locate the LN-15 away from radio controlled machin-
ery. The normal operation of the LN-15 may adversely
affect the operation of RF controlled equipment, which
may result in bodily injury or damage to the equipment
total.
WARNING
WARNING
CAUTION

A-3
INSTALLATION
LN-15 ACROSS THE ARC MODEL
A-3
WELD CABLE CONNECTIONS
ELECTRIC SHOCK CAN KILL.
• ONLY A QUALIFIED ELECTRICIAN SHOULD
CONNECT THE ELECTRODE LEADS TO THE
LN-15. CONNECTIONS SHOULD BE MADE IN
ACCORDANCE WITH ALL LOCAL AND
NATIONAL ELECTRICAL CODES. FAILURE
TO DO SO MAY RESULT IN BODILY INJURY
OR DEATH.
------------------------------------------------------------------------
The size of the electrode cable and work cable must
be sufficient for the maximum weld current and total
cable length used.
To avoid interference problems with other equipment
and to achieve the best possible operation, route all
cables directly to the work or wire feeder. Avoid
excessive lengths and do not coil excess cable. Be
sure the connection to the work makes tight metal-to-
metal electrical contact. (See Table A.1)
ELECTRODE CONNECTION
Route the electrode cable through the strain relief in
the rear of the case. Connect the electrode cable to
the LN-15 input stud using the mounting hardware
provided. Secure the cable by tightening the strain
relief.
All units are supplied with an optional pigtail for cus-
tomers that prefer to make a taped and bolted con-
nection externally.
WORK CONNECTION
Connect a work lead of sufficient size between the
proper output stud on the power source and the work.
Be sure the connection to the work makes tight metal
to metal electrical contact. Poor work lead connec-
tions can result in poor welding performance.
POWER SOURCE CONNECTION
The LN-15 can be used with any DC welding power
source. A constant voltage power source is recom-
mend; however, the LN-15 can also be used with a
constant current power source as long as the open
circuit voltage is less than 110VDC.
TO PREVENT POSSIBLE DAMAGE TO THE LN-15, DO NOT
CONNECT THE LN-15 TO NON-LINCOLN TIG OR SQUARE
WAVE POWER SOURCES. TIG HIGH FREQUENCY SHOULD
NEVER BE APPLIED TO THE LN-15.
------------------------------------------------------------------------------------------
WARNING
CAUTION
Weld Current Total Cable Length
60% Duty (electrode cable + work cable)
Cycle 50 - 100' 100 - 150' 150 - 200' 200 - 250'
(15-30 m) (30 - 46m) (46 - 61m) (61m - 76m)
200 Amps 2 AWG 2 AWG 1 AWG 1/0
300 Amps 1 AWG 1 AWG 1/0 2/0
400 Amps 2/0 2/0 3/0 3/0
TABLE A.1
GUN AND CABLE ASSEMBLIES
A variety of Lincoln 10' (3.0m) or 15' (4.6m) gun and
cable assemblies are available for use with the LN-15,
including the Magnum™ models for GMAW, K126 or
K115 models for Innershield®.
The LN-15 comes factory equipped with a K1500-2
gun connection kit, designed for guns having a
Tweco™ #2-#4 connector. Many other guns can easi-
ly be used with the LN-15 with other K1500 series gun
connection kits.
Gun Cable Connection to the Feeder
Lay the cable out straight. Insert the connector on the
welding conductor cable into the brass bushing on the
front of the wire drive unit. Keep the all mating sur-
faces clean. Make sure it is fully seated and tighten
the thumb screw.
Connect the control cable plug into the 5 pin recepta-
cle on the front panel of the wire feeder.
ELECTRODE POLARITY
The LN-15 automatically adjusts for positive and neg-
ative polarity. When welding with negative polarity
procedures, the voltmeter will display a "-" sign; exam-
ple "-23.6" Volts.
CONTROL CABLE CONNECTIONS
Across the Arc LN-15 models do not use a control
cable.
Table A.2 Trigger Connector J1 (5 Pin)
PIN Lead # Function
A 556 Trigger
B - Not used
C 554 Trigger/ 83%
Procedure ground
D 555 83% Procedure
E 554 Trigger/ 83%
Procedure ground

A-4
INSTALLATION
LN-15 ACROSS THE ARC MODEL
A-4
CV655
V350-PRO
DC400
DC600
DC655
RANGER 9
RANGER 250
RANGER 300 DLX
RANGER 305G
COMMANDER 300
COMMANDER 500
Work
Clamp
Electrode Cable
Electrode Cable
Electrode Cable
Work
Clamp
Work
Clamp
Across the Arc
K1870-1
RANGER 8
SAE 400 WITH CV ADAPTER
ENGINE DRIVEN
WELDERS WITH
WIRE FEED MODULE
(LOCAL MODE)
CV250
CV300
CV400
Across the Arc
K1870-1
CC POWER SOURCE
Across the Arc
K1870-1
Output Terminals
Always Hot.
Output Terminals
Always Hot.
Output Terminals
Always Hot.
Order K484 Jumper
Plug Kit.
Output Terminals
Always Hot.
Power source contactor
switch must be in the "ON"
position or use a K848
Junper Plug Kit.
Across the Arc
K1870-1
Electrode Cable
Work
Clamp
CONNECTION DIAGRAM, ACROSS THE ARC MODEL Set-Up ( See Figure A.1)
Typically used for general fabrication, maintenance and repair jobs because it’s easy to set up and operate.
Requires only one cable-less to carry. Contactor standard on Across The Arc Model.
FIGURE A.1
Although a constant voltage (CV) power source is recommended for best results with Innershield®and gas
metal arc (GMAW) open arc welding, satisfactory general purpose welding may be obtained using the LN-15
with a constant current (CC) power source for noncritical commercial quality mild steel welding applications.

A-5
INSTALLATION
LN-15 ACROSS THE ARC MODEL
A-5
FEEDING WIRE ELECTRODE
•ELECTRIC SHOCK CAN KILL.
•When feeding electrode with the
gun trigger, the electrode and wire
drive mechanism are always "hot"
to work and ground and could
remain "hot" several seconds after
the gun trigger is released.
-----------------------------------------------------------------------
1. Turn the reel or spool until the free end of the elec-
trode is accessible.
2. While tightly holding the electrode, cut off the bent
end and straighten the first 6" (15 cm). Cut off the
first 1" (2.5 cm). If the electrode is not properly
straightened, it may not feed or may jam.
3. Insert the free end through the incoming guide
bushing.
4. Press the Cold Feed switch and push the electrode
into the drive roll.
5. Feed the electrode through the gun.
6. Adjust the brake tension with the thumbscrew on
the spindle hub, until the reel turns freely but with
little or no overrun when the wire feeding stops. Do
not overtighten.
WARNING
COLD FEED/GAS PURGE SWITCH
PROCEDURE TO INSTALL DRIVE ROLLS
AND WIRE GUIDES
•Turn off input power at the weld-
ing power source before installa-
tion or changing drive roll and/or
wire guides.
•Do not touch electrically live parts
such as the wire drive or internal wiring.
•When feeding with the gun trigger, the electrode
and wire 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 this
operation.
------------------------------------------------------------------------
1. Turn OFF the welding power source.
2. Open the LN-15 case and then release the idle roll
pressure arm.
3. Remove the outer wire guide by turning the knurled
thumbscrews counter-clockwise to unscrew them
from the feed plate.
4. Rotate the triangular shaped drive roll retaining
mechanism to unlock the drive rolls and remove the
drive rolls.
5. Remove the inner wire guide.
6. Insert the new inner wire guide, groove side out,
over the two locating pins in the feed plate.
7. Install a drive roll on each hub assembly and lock
by rotating the triangular drive roll retaining mecha-
nism.
8. Install the outer wire guide by aligning it with the
pins and tightening the knurled thumbscrews.
9. Close the idle arm and engage the idle roll pressure
arm. Adjust the pressure appropriately.
WARNING

B-1
OPERATION
LN-15 ACROSS THE ARC MODEL
B-1
•ELECTRIC SHOCK CAN KILL.
Unless using COLD FEED fea-
ture, when feeding with gun trig-
ger, the electrode and drive
mechanism are always electri-
cally energized and could
remain energized several sec-
onds after the welding ceases..
•Do not attach the work clip to the roll cage or
bottom skids. The work clip is energized any
time the output of the welding power source is
“ON”, even when the feeder is not welding.
•Do not touch electrically live part or electrode
with skin or wet clothing.
•Insulate yourself from work and ground.
•Always wear dry insulating gloves.
•The serviceability of a product or structure uti-
lizing the LN-15 wire feeder is and must be the
sole responsibility of the builder/user. Many
variables beyond the control of The Lincoln
Electric Company affect the results obtained in
using the LN-15 wire feeder. These variables
include, but are not limited to, welding proce-
dure, plate chemistry and temperature, weld-
ment design, fabrication methods and service
requirements. The available range of the LN-15
wire feeder may not be suitable for all applica-
tions, and the builder/user is and must be sole-
ly responsible for welding settings.
---------------------------------------------------------------------
•FUMES AND GASSES can be
dangerous.
•Keep your head out of fumes.
•Use ventilation or exhaust to
remove fumes from breathing
zone.
---------------------------------------------------------------------
•WELDING SPARKS can cause
fire or explosion.
•Keep flammable material away.
----------------------------------------------------------------------
ARC RAYS can burn.
•Wear eye, ear and body protec-
tion.
---------------------------------------------------------------------
SEE ADDITIONAL WARNING INFORMATION
UNDER ARC WELDING SAFETY PRECAUTIONS
AND IN THE FRONT OF THIS OPERATING MAN-
UAL.
----------------------------------------------------------------------
WARNING
SAFETY PRECAUTIONS
READ AND UNDERSTAND ENTIRE SECTION
BEFORE OPERATING MACHINE.
INPUT POWER
ON
OFF
WIRE FEEDER
POSITIVE OUTPUT
NEGATIVE OUTPUT
INPUT POWER
DIRECT CURRENT
OPEN CIRCUIT
VOLTAGE
INPUT VOLTAGE
OUTPUT VOLTAGE
INPUT CURRENT
OUTPUT CURRENT
PROTECTIVE
GROUND
WARNING OR
CAUTION
U0
U1
U2
I1
I2
GRAPHIC SYMBOLS THAT APPEAR ON
THIS MACHINE OR IN THIS MANUAL

B-2
OPERATION
B-2
GENERAL DESCRIPTION
The LN-15 is a light weight, portable, durable semi-
automatic wire feeder.
The LN-15 accommodates spools 8" (200mm) diame-
ter up to 4" (100mm) wide.
The feeder comes factory equipped with a K1500-2
Tweco style #2-#4 gun bushing. Other K1500 series
gun bushings are available as field installed options.
The “dual procedure”mode drops the WFS 83% from
the original set point. The voltage setting remains the
same.
The Across the Arc Model is capable of operating with
Lincoln DC power sources supplying between 15VDC
and 110 VDC. Simply attach the work clip and then
connect the LN-15 to the electrode cable and it is
ready to weld.
An internal contactor in Across the Arc Models ener-
gizes the electrode output in response to the gun trig-
ger.
•Burn-back is adjustable from 0.0 to 0.25 seconds,
with a default of 0.0 seconds.
•The preflow time is adjustable from 0.00 to 2.50 sec-
onds, with a default of 0.0 seconds.
•The postflow time is adjustable from 0.0 to 10.0 sec-
onds, with a default setting of 0.0 seconds.
DUTY CYCLE
The LN-15 wire feeders are intended for semi-automatic
use. The maximum rating of the LN-15 is based upon a
60% duty cycle; welding 6 minutes of welding followed by
4 minutes of idling within a 10 minute period.
RECOMMENDED PROCESSES
The LN-15 wire drive feeds electrode for various
processes as follows:(See Table B.1)
The Across the Arc Model is suitable for GMAW and
FCAW semi-automatic applications within the rated
duty cycle.
LN-15 ACROSS THE ARC MODEL
PROCESS LIMITATIONS
•The across the arc model is not recommended for
GMAW-STT, SAW, SMAW, GTAW or CAG.
•The LN-15 does not support 4 step trigger operation.
OPERATIONAL FEATURES AND
CONTROLS
•Built in flow meter for adjusting shielding gas.
•Cold Feed/Gas Purge switch.
•Digital wire feed speed control.
•Digital display of welding voltage.
•Adjustable preflow and postflow times
•Adjustable burnback times.
Process Wire Diameter Range Wire Feed Speed Range
GMAW 0.023 - 0.052" (0.6 - 1.3 mm) 50 - 700 ipm (1.3 - 17.8 m/minute)
FCAW- Gas Shielded 0.035 - 0.052" (1.2 - 1.3 mm) 50 - 700 ipm (1.3 - 17.8 m/minute)
FCAW- Gas Shielded 1/16 - 5/64" (1.6 - 2.0 mm) 50 - 400 ipm (1.3 - 10.2 m/minute)
FCAW- Self Shielded 0.035 - 0.052" (1.2 - 1.3 mm) 50 - 700 ipm (1.3 - 17.8 m/minute)
FCAW- Self Shielded 1/16 - 5/64" (1.6 - 2.0 mm) 50 - 400 ipm (1.3 - 10.2 m/minute)
TABLE B.1

B-3
OPERATION
B-3
LN-15 ACROSS THE ARC MODEL
CASE FRONT CONTROLS (See Figure B.1)
ACROSS THE ARC MODEL
1. WIRE FEED SPEED DISPLAY-The Wire Feed
Speed display shows the rate the LN-15 will feed elec-
trode during welding. The wire feed speed is calibrat-
ed to within ±2%.
2. VOLTAGE DISPLAY-The voltage display shows
the average arc voltage during the welding. The aver-
age voltage will continue to be shown for 5 seconds
after the end of the weld. When not welding, the dis-
play is "- - - ". The voltage is calibrated to ±2% over a
range of 10 to 45 volts.
A minus sign "-" will appear when welding with elec-
trode negative welding procedures.
3. WIRE FEED SPEED KNOB-The Wire Feed Speed
knob is a 3-1/2 turn potentiometer that adjusts of the
rate of feeding electrode.
4. TRIGGER CONNECTOR-5 Pin Receptacle is used
to activate the Magnum Gun Switch.
5. CONNECTOR BUSHING-This connection is for
welding conductor cable assembly.
FIGURE B.1
12
3
4
5
6
6. WORK CLIP LEAD-This lead must be connected
directly to the work using the spring clip.
DUAL PROCEDURE
The LN-15 supports a special "dual procedure" mode.
When activated, the wire feed speed is reduced to
83% of the set value, but no less than 50
inches/minute (1.27 m/min).
A Magnum 400 DP gun or equivalent is required to
activate the 83% dual procedure mode.

B-4
OPERATION
B-4
LN-15 ACROSS THE ARC MODEL
LN-15 POWER-UP SEQUENCE
Normal Power-Up Display
When power is first applied to the LN-15, the display
will momentarily show set-up information. For exam-
ple, it may show "CV" and "HI", indicating operation
from a CV power source and the wire drive is config-
ured for the high speed gear. Because of limitations in
the display, "CV" will appear as "CU".
After a brief moment, the LN-15 will then display the
WFS and "---". No voltage is displayed until the trigger
is pressed.
Preflow, Postflow and Burnback Times
Preflow, Postflow and Burnback times are all
adjustable on the LN-15. The LN-15 is factory set with
all the times set to 0.0 seconds.
•The burnback time is adjustable from 0.00 to 0.25
seconds.
•The preflow time is adjustable from 0.0 to 2.50 sec-
onds.
•The postflow time is adjustable from 0.0 to 10.0 sec-
onds.
Changing Preflow, Postflow or Burnback times:
1. Enter the “Press Spin”Set-Up Mode:
While the power to the LN-15 is off, activate and
hold the GAS PURGE switch (Down Position). Turn
on power to the LN-15, and continue to hold the
GAS PURGE switch until the LN-15 displays "Press
spin". Release the GAS PURGE switch.
The LN-15 is now in the "Press Spin" set-up mode. If
after 15 seconds no other action is taken, the LN-15
will then revert to normal operation.
2. Rotate the WFS knob until the desired timer is dis-
played.
Preflow:
Postflow:
Burnback:
3. Activate and then release the GAS PURGE switch
to select the timer. The time will then display in the
right hand side of the display. Example:
4. Rotate the WFS knob to adjust the time to the new
setting.
5. Press the GAS PURGE switch again to save the
setting. The LN-15 will then return to the original
"Press Spin" mode in step 1.
6. To exit the "Press Spin" set-up mode, turn off power
to the LN-15, or simply wait 15 seconds and the
LN-15 will enter normal operation.
Welding Mode CV/CC mode and WFS units
The CV/CC mode and WFS units are all readily
changed during the power-up sequence. The LN-15 is
factory set for "CV" welding power sources and "inch-
es per minute" for the wire feed speed units.
•The CV/CC mode is selectable for either CV for
Constant Voltage power sources and CC for
Constant Current power sources. Use CV power
sources whenever possible for best results.
•The WFS units is selectable for either in/min and
m/min.
Changing the CV/CC mode, or WFS units:
1. Enter the “Press Spin”Set-Up Mode:
While the power to the LN-15 is off, activate and
hold the GAS PURGE switch (Down Position). Turn
on power to the LN-15, and continue to hold the
GAS PURGE switch until the LN-15 displays "Press
spin". Release the GAS PURGE switch.
The LN-15 is now in the "Press Spin" set-up mode.
If after 15 seconds no other action is taken, the LN-
15 will then revert to normal operation.
COLD
FEED
GAS PURGE
COLD
FEED
GAS PURGE

B-5
OPERATION
B-5
LN-15 ACROSS THE ARC MODEL
Rotate the WFS knob until the desired parameter is
displayed.
CV/CC Mode:
WFS Units:
2. Activate and release the GAS PURGE switch to
select the parameter. The present value will then
display in the right hand side of the display.
Example:
3. Rotate the WFS knob to change the parameter set-
ting.
CV/CC Mode:
•"CU" for Constant Voltage power sources
•"CC" for Constant Current power sources
WFS Units:
•"US" for in/min
•"Eur" for mm/min
4. Press the GAS PURGE switch to save the setting.
The LN-15 will then return to the original "Press
Spin" mode in step 1.
5. To exit the "Press Spin" set-up mode, turn off power
to the LN-15, or simply wait 15 seconds and the
LN-15 will enter normal operation.

B-6
OPERATION
B-6
LN-15 ACROSS THE ARC MODEL
SPRING TENSION ARM
The spring tension arm sets the clamping pressure of
the drive rolls on the electrode. The optimum pressure
varies with the type of wire, wire diameter, surface
conditions, lubrication and hardness. As a general
rule, hard electrodes like solid stainless electrodes
may require greater pressure and softer electrodes
like aluminum may use less pressure.
To set the spring tension arm
•Turn the knob until it is approximately at the #3
mark.
•Press the end of the gun against a solid object that
is electrically isolated from the welder output and
cold feed for several seconds.
•If the wire "birdnests", jams or breaks at the wire
drive than the idle roll pressure is too great. Loosen
the pressure arm by about a 1/2 turn., run new wire
through the gun, and repeat the above steps.
•If the drive rolls slipped on the wire, loosen the
adjustment knob on the feed plate and the gun and
cable assembly forward about 6" (15cm). A slight
waviness will be visible (it will be more visible with
smaller or softer electrodes.) If there are no waves
in the wire, tighten the knob 1/4 turn, reinstall the
gun and cable assembly and repeat the above
steps.
COLD FEED/GAS PURGE SWITCH
Inside the LN-15 is a “center-off”momentary toggle
switch for Cold Feed/Gas Purge.
When held in the UP position, the wire drive will feed
electrode but neither the power source nor the gas
solenoid will be energized. When cold feeding, the
feed speed is the same as the welding wire feed
speed. The wire feed speed may be adjusted by rotat-
ing the WFS knob on the front of the LN-15.
INTERNAL CONTROLS (Figure B.2) When the toggle switch is held in the DOWN position,
the gas solenoid valve is energized but neither the
power source nor the drive motor will be energized.
While the Gas Purge button is activated, the flow rate
of the Shielding gas can be adjusted. See the “Flow
meter “section below.
SPINDLE BRAKE
Adjust the spindle brake tension to allow the spool to
spin freely, yet have enough resistance for little or no
overrun when wire feeding is stopped.
FLOW METER
The flowmeter shows the flow rate of shielding gas
and has a valve to adjust the flow. It is calibrated in
Standard Cubic Feet per Hour (SCFH) for CO2, Ar,
and CO2/Ar blends.
The flow rate may be adjusted by turning the valve at
the top of the meter. Most weld procedures require
25-40 scfh (11.8 - 18.9 Liters/Hour) for sufficient
shielding gas coverage. Gun angle, nozzle diameter,
joint configuration and wind conditions may effect the
amount of shielding gas required. To convert (SCFH)
to Liters/Hour multiply SCFH value by .472.
SCFH Liter/Hour
10 4.7
20 9.4
30 14.2
40 18.9
50 23.6
60 28.3
70 33.1
80 37.8
SHIELDING GAS CONNECTION
CYLINDER may explode if
damaged.
•Keep cylinder upright and
chained to support.
•Keep cylinder away from areas where it may be
damaged.
•Never lift welder with cylinder attached.
•Never allow welding electrode to touch cylinder.
•Keep cylinder away from welding or other live
electrical circuits.
-----------------------------------------------------------------------
WARNING

B-7
OPERATION
B-7
LN-15 ACROSS THE ARC MODEL
•Build up of shielding gas may harm health or kill.
•Shut off shielding gas supply when not in use.
•See American National Standard Z-49.1, "Safety
in Welding and Cutting”Published by the
American Welding Society.
------------------------------------------------------------------------
CONSTANT CURRENT OPERATION
( See Figure B.3)
Most semiautomatic welding processes perform better
using constant voltage power sources.
Welding codes usually do not address the power source
selection or specifically, whether the welding process is
to be operated in the constant voltage or constant current
mode. Instead, codes typically specify limitations on the
current, voltage, heat input and preheat temperature
based on the material to be welded. The intention is to
assure that proper weld material properties will develop.
Welding is sometimes performed using constant current
power sources. The operation can be more convenient
because it may allow the use of an existing stick (SMAW)
power source and the power source can be placed at a
distant location without any provision for adjusting the
output settings.
For constant current operation, the power source is set to
deliver the specified current. The power source regulates
this current regardless of changes in the welding circuit,
including cable length, electrode diameter, wire feed
speed, contact tip to work distance, etc.
Changes in the wire feed speed (WFS) or contact tip
to work distance (CTWD) affect the arc voltage when
constant current power sources are used. Lowering
the wire feed speed raises the voltage, raising the
wire feed speed lowers the voltage. Lengthening the
contact tip to work distance raises the voltage, short-
ening the contact tip to work distance lowers the volt-
age.
If the contact tip to work distance is properly main-
tained, a satisfactory operating voltage range may be
achieved, and a sound weld may result. However,
when a welder uses a longer contact tip to work dis-
tance, an arc-sensing wire feeder compensates by
increasing the wire feed speed to regulate the voltage.
Even if the voltage and current remain unchanged, the
increased wire feed speed may result in a deposition
rate well beyond the specified range of the electrode.
Under these conditions, the specified weld metal prop-
erties may not be achieved.
Constant voltage power sources deliver large current
surges to stabilize the arc when the electrode is short-
ed or the arc length is very short. However, a constant
current power source does not provide such a
response to stabilize the arc. It may be difficult to
achieve required weld metal properties, or to achieve
the required quality of welds needed to pass nonde-
structive tests, when such welds are made under con-
stant current operation.
For these reasons, Lincoln Electric does NOT recom-
mend constant current semiautomatic welding for
applications which need to meet specified weld metal
chemical or mechanical property requirements or weld
quality requirements.
FIGURE B.3
WARNING

B-8
OPERATION
B-8
LN-15 ACROSS THE ARC MODEL
SETTING ARC SENSING WIRE FEED SPEED
FOR CONSTANT CURRENT OPERATION
When using a constant current (formerly variable voltage)
power source, welding performance is improved using arc
sensing wire feed speed (CC operation). In this wire feed
mode the wire speed increases if arc voltage increases,
and decreases if arc voltage decreases, but remains con-
stant at any specific voltage level.
The LN-15 permits accurate presetting of the desired
wire feed speed, for the desired arc voltage to be used,
by setting the Wire Feed Speed in the following manner
before welding:
a. Activate press and spin during power up and change
to the CC mode. See “Changing the CV/CC mode
or WFS units”in this Operation Section.
FIGURE B.4 CC WIRE SPEED SETTING
b. Referring to the graph located above the Mode switch
(also shown in Figure B.4):
1. Select the horizontal line representing the DE-
SIRED IN/MIN. for the welding procedure. (See
example arrow line for 375 in/min.)
2. Select the diagonal line representing the ARC
VOLTS to be used for the welding procedure. (See
example arrow line for 29 volts.)
3. Determine the vertical line representing the CC
WIRE SPEED SETTING where the above two lines
cross. (See example arrow line for 450.)
c. Adjust the WFS display to the value determined in
Step (3) above (450 for example used).
The wire will feed at the DESIRED IN/MIN speed when the welding
power source is set to the arc
voltage to be used for the weld
procedure (375 in/min. at 29V for example used).
The CC wire speed setting graph is shown in TABLE B.1, giving
the Wire Speed dial setting required for the DESIRED IN/MIN
and ARC VOLTS used for the welding procedures:
TABLE B.1 CC WIRE SPEED SETTING
Arc Volts Used
Desired
In/Min 16 18 20 22 24 26 28 30 32 34
50 109 97 88 80 73 67 63 58 55 51
60 131 117 105 95 88 81 75 70 66 62
70 153 136 123 111 102 94 88 82 77 72
80 175 156 140 127 117 108 100 93 88 82
90 197 175 158 143 131 121 113 105 98 93
100 219 194 175 159 146 135 125 117 109 103
110 241 214 193 175 160 148 138 128 120 113
120 263 233 210 191 175 162 150 140 131 124
130 284 253 228 207 190 175 163 152 142 134
140 306 272 245 223 204 188 175 163 153 144
150 328 292 263 239 219 202 188 175 164 154
160 350 311 280 255 233 215 200 187 175 165
170 372 331 298 270 248 229 213 198 186 175
180 394 350 315 286 263 242 225 210 197 185
190 416 369 333 302 277 256 238 222 208 196
200 438 389 350 318 292 269 250 233 219 206
210 459 408 368 334 306 283 263 245 230 216
220 481 428 385 350 321 296 275 257 241 226
230 503 447 403 366 335 310 288 268 252 237
240 525 467 420 382 350 323 300 280 263 247
250 547 486 438 398 365 337 313 292 273 257
260 569 506 455 414 379 350 325 303 284 268
270 591 525 473 430 394 365 338 315 295 278
280 613 544 490 445 408 377 350 327 306 288
290 634 564 508 461 423 390 363 338 317 299
300 656 583 525 477 438 404 375 350 328 309
310 678 603 543 493 452 417 388 362 339 319
320 700 622 560 509 467 431 400 373 350 329
330 642 578 525 481 444 413 385 361 340
340 661 595 541 496 458 425 397 372 350
350 681 613 557 510 471 438 408 383 360
360 700 630 572 526 484 450 420 394 370
380 666 604 554 512 472 444 416 392
400 700 636 584 538 500 466 438 412
420 668 612 566 526 490 460 432
440 700 642 592 550 514 482 452
460 670 620 576 536 504 472
480 700 646 600 560 526 494
500 674 626 584 546 514
520 700 650 606 568 536
540 676 630 590 556
560 700 654 612 576
580 676 634 598
600 700 656 618
620 678 638
640 700 658
660 680
680 700
700
CC Speed Setting = Desired IPM X 35
Arc Volts