Lincoln Na5 Service Manual

NA-5
AUTOMATIC WELDING SYSTEMS
SERVICE MANUAL
Sales and Service through Subsidiaries and Distributors Worldwide
22801 St. Clair Ave. Cleveland, Ohio 44117-1199  U.S.A. Tel. (216) 481-8100
Worlds Leader in Welding and Cutting Products Premier Manufacturer of Industrial Motors
SVM131-A 
July, 1997
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 operation on
your...

SAFETYii
FOR ENGINE
powered equipment.
1.a. Turn the engine off before troubleshooting and maintenancework unless the maintenance work requires it to be running.
____________________________________________________ 1.b. Operate engines in open, well-ventilatedareas or vent the engine exhaust fumes 
outdoors.
____________________________________________________ 1.c. Do not add the fuel near an open flame weld-ing arc or when the engine is running. Stop
the engine and allow it to cool before refuel-
ing to...

SAFETYiiii
ARC RAYS can burn.
4.a. Use a shield with the proper filter and coverplates 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...

SAFETYiiiiii
FOR ELECTRICALLY
powered equipment.
8.a. Turn off input power using the disconnectswitch 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...

SAFETYiviv
PRÉCAUTIONS DE SÛRETÉ
Pour votre propre protection lire et observer toutes les instructions
et les précautions de sûreté specifiques qui parraissent dans c\
e
manuel aussi bien que les précautions de sûreté générales suiv-
antes:
Sûreté Pour Soudage A L’Arc1. Protegez-vous contre la secousse électrique: a. Les circuits à l’électrode et à la piéce sont sous tensio\
nquand la machine à souder est en marche. Eviter
toujours tout contact entre les parties sous tension et
la peau nue ou les...

v
v
NA-5
MASTER TABLE OF CONTENTS FOR ALL SECTIONS
PageSafety  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
 . . . . . . . . . . . . . . . i-iv
Installation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
 . . . . . . . . . . . . Section A
Technical Specifications  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
 A-2
Mechanical Installation   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
 A-4...

NOTESvivi
NA-5Return to Master TOCReturn to Master TOCReturn to Master TOC Return to Master TOC 

TABLE OF CONTENTS
- INSTALLATION SECTION - 
NA-5
Installation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
 . . . . . . . . . Section A
Technical Specifications  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Mechanical Installation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4 Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
 . . . A-4
Control Box Installation  . . . . . . . . . . . . . ....

A-2INSTALLATIONA-2
NA-5
TECHNICAL SPECIFICATIONS – NA-5
MINIMUM ELECTRICAL INPUT REQUIREMENTS115 VAC @ 3 amps 50/60 Hz power
REQUIRED WELDING POWER SOURCE
NA-5 DC Constant Voltage
WIRE FEED SPEED and GEAR RATIOSFEED SPEED RANGE MAX. WIRE SIZE in. (mm)
GEAR RATIO in./min (m/min) CORED WIRE SOLID WIRE
21:1 100 - 2070 (2.54 - 52.6) 0.052 (1.3) 0.052 (1.3)
57:1 38 - 7.78 (0.96 - 19.8) 3/32 (2.4) 1/16 (1.6)
95:1 22 - 456 (0.56 - 11.6) 5/32 (4.0) 1/8 (3.2)
142:1 15 - 300 (0.38 - 7.62)  5/32 (4.0) 7/32 (5.6)...

INSTALLATIONA-3A-3
NA-5
FIGURE A.1 – BASIC CONTROL AND WIRE DRIVE SYSTEM.
CONTROL  BOXHEAD MOUNTING PARTS
 (WITH INSULATION
 AND HARDWARE)
WIRE
STRAIGHTENER
CROSS
SEAM
ADJUSTER
CONTACT
ASSEMBLY
(OPTIONAL)
GEAR  BOX
4 FT  (1.2 M)  CABLE
(DRIVE  MOTOR  TO
 CONTROL  BOX)
4 FT  (1.2 M)  ELECTRODE  CABLES
 [(TWO 4/0)  CONTACT  ASSEMBLY
 TO CONTROL BOX]


 

MOTOR
CONTROL
CABLE
 TO
POWER
SOURCE
TACHOMETER
 CABLE
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