Lincoln Electric GMA WIRE FEEDERS LN-7 User Manual

LN-7 and LN-7 GMA Wire Feeders
(2 and 4 Roll Models)
OPERATOR’S MANUAL
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 thought-
ful operation 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.
IM351-C
June, 2010
VOLTS
NEGATIVE
ELECTRODE
POLARITY
POSITIV
E
THE LINCOLN ELECTRIC CO.
CLEVELAND, OH U.S.A.
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afety
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2
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FR
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vailable
from U
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W
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LN-7 GMA CONTROL
WIRE SPEED
INCHES PER MINUTE
100
200
150
250
700
650
600
550
500
450
400
350
300
S
E
R
I
A
L
N
O
.
CODE NO.
LN-7
NEM
A EW3
115V, 50/60 HZ AMPS
This machine a
nd the ac
cessories are cov
e
re
d by one or m
ore
of the
follo
win
g
patents: U
nited
s
ta
tes 3,8
06,6
95; 3.975
,616; 4,246,463;
4
,247,751; Australia 467,4
47; 499,5
02; 517,120; 525
,541; B
razil 79
,787; P
I
7,8
03,421; PI 7,9
05,509; Canada 965,487
; 1,041
,181
; 1,0
93
,159
; 1,1
19,674
;
European Pa
tent 8527
(France, W
es
t G
erma
ny
, United Kingdom,
Netherlands
, Italy
, Swe
den); Fra
nce 7
3.01477; 7
5 34477
; 78 14
757l Italy
1,102,5
02; Mexico 147,019; S
. Korea 19064; S
weden 78051
12
-5; U
nited
King
dom 1,529,7
26; 1,5
79,7
00; W
. G
ermany 25 50
278; 28 23 2
93.
Other patents
pending.
LN-7 GMA shown with optional
K417 digital meter kit and K418
GMA timer kit.
For machines with code numbers: 9100 and above
• Sales and Service through Subsidiaries and Distributors Worldwide •
Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com
• World's Leader in Welding and Cutting Products •
Copyright © Lincoln Global Inc.

Lincoln Electric GMA WIRE FEEDERS LN-7 Specifications

General

Brand	Lincoln Electric
Model	GMA WIRE FEEDERS LN-7
Category	Welding Accessories
Language	English

Summary

Operator's Manual

Introduction and Safety Overview

General introduction to the manual and initial safety warnings.

Safety Information

California Proposition 65 Warnings

State warnings regarding cancer, birth defects, and reproductive harm from engine exhaust.

General Welding Hazards

Hazards associated with arc welding, including protecting oneself and others from injury.

Electric Shock and Arc Ray Protection

Precautions to prevent electric shock, and protection against arc rays and spatter.

Fume, Gas, Fire, and Explosion Hazards

Risks from welding fumes, gases, fires, explosions, and compressed cylinders.

Installation and Setup

Technical Specifications

Details on input voltage, wire feed speed, wire diameters, and physical dimensions of the feeder.

Mounting and Grounding

Guidance on securely mounting the wire feeder and proper machine grounding procedures.

Cable Connections

Instructions for connecting input control cables and electrode/work cables to various power sources.

Water and Gas Hookups

Procedures for connecting water cooling lines and shielding gas hookups for operation.

Operation and Controls

Operation Safety and Description

Essential safety guidelines and an overview of the LN-7/LN-7 GMA wire feeder features.

Wire Feeder Controls Overview

Explanation of the wire feeder's main controls like wire speed, burnback, and polarity switches.

Drive Roll Installation

Step-by-step instructions for changing drive rolls for two-roll and four-roll feeder configurations.

Wire Loading and Feeding

Methods for loading various wire reels, spools, and adjusting electrode feeding and brake tension.

Weld Adjustment and Making a Weld

Procedures for setting acceleration, wire speed, voltage, and performing the welding process.

Maintenance and Troubleshooting

Routine Maintenance Procedures

Regular checks and cleaning for drive rolls, guide tubes, wire reel mounting, and circuit fuses.

Gun Cable Maintenance

Procedures for maintaining welding guns, cables, nozzles, and automatic flux feeding systems.

Troubleshooting Common Issues

Guide to diagnosing and resolving common problems like wire feeding issues, arc instability, and electrical faults.

Wiring Diagram

Wiring Diagram

Detailed schematic illustrating electrical connections and component layout for the wire feeder.