Lincoln Na5 Service Manual

INSTALLATIONA-14A-14
NA-5
FIGURE A.13 – CONNECTION OF NA-5 TO DC-1000 OR DC-1500.
 THE DIAGRAM SHOWS ELECTRODE CONNECTED POSITIVE.  TO CHANGE POLARITY, TU\
RN POWER OFF, REVERSE THE ELECTRODE AND WORK  LEADS AT THE
 POWER SOURCE, POSITION THE POSITIVE-NEGATIVE SWITCH ON THE POWER SOURCE\
 TO CORRESPOND TO THE POLARITY OF THE ELECTRODE CABLE CONNECTION. 
 REFER TO NA-5 OPERATING MANUAL FOR REQUIRED NA-5 CONTROL BOX POLARITY C\
ONNECTIONS.

P
POWER  SOURCE CONTROL
CABLE
BOLT TO CABLES FROM
NA-5 WIRE...

INSTALLATIONA-15A-15
NA-5
FIGURE A.14 – CONNECTION OF NA-5 TO DC-400 OR CV-400.
THE DIAGRAM SHOWS ELECTRODE CONNECTED POSITIVE.  TO CHANGE POLARITY, TUR\
N POWER OFF, REVERSE THE ELECTRODE AND WORK  LEADS AT THE
POWER SOURCE AND POSITION THE SWITCH ON POWER SOURCE (IF EQUIPPED), TO\
 PROPER POLARITY.  REFER TO NA-5 OPERATING MANUAL FOR REQUIRED
NA-5 CONTROL BOX POLARITY CONNECTIONS. ALSO REFER TO NOTE N.H.FOR ADDITIONAL INSTALLATION INSTRUCTIONS, SEE NA-5 OPERATING MANUAL. 
 



 
* DOES  NOT APPLY...

NOTESA-16A-16
NA-5Return to Section TOCReturn to Section TOC Return to Section TOC Return to Section TOCReturn to Master TOCReturn to Master TOCReturn to Master TOC Return to Master TOC 

TABLE OF CONTENTS
- OPERATING  INSTRUCTIONS SECTION - 
NA-5
Operating Instructions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
 Section B
Safety Precautions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
 . B-2
Operator’s Instructions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Controls and Their Functions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3 Exposed Controls (With Lockable Cover Down) . . . ....

OPERATOR’S
INSTRUCTIONS
Once the system is properly set up, the
operator can make production welds
without readjusting the controlsusing the
following simple instructions: 1. Be sure there is enough electrode in
the machine to complete the weld.
2. If submerged arc welding, fill flux hopper with new or freshly screened
flux. All reused flux must be screened
100% through an 8 mesh screen
[0.065 to 0.075 in. (1.6 to 1.9 mm)
opening]. Turn the switch on the
hopper to “On.”
3. Start the power source.
4. Turn...

OPERATING INSTRUCTIONSB-3B-3
NA-5
CONTROLS AND
THEIR FUNCTIONS
The operator controls for the NA-5 are
illustrated in Figure B.1. Refer to the figure
and the following explanations of the
controls.
EXPOSED CONTROLS (WITH
LOCKABLE COVER DOWN)
1.CIRCUIT BREAKER. Protects the
circuit from severe wire feed motor
overloads and short circuits. Press to
reset. 
2. CONTROL POWER. Turns input
control power “On” and “Off.” Also
used as an emergency “Off” in case
of malfunction.
3. ELECTRODE “HOT” LIGHT.
Comes on...

OPERATING INSTRUCTIONSB-4B-4
NA-5
SETUP INSTRUCTIONS
Use the following steps to set up the NA-5
welding system prior to welding:1. If using a multi-process power source (SAM, DC-400, DC-600, DC-1000,
OR DC-1500 type), make con-
nections and settings per the power
source connection diagram (Figures
A.8 to A.14) for the process being
used.
AUTO TAB
When using the NA-5 with the DC-
400 or CV-400 power source, the
auto tab jumper on the NA-5 voltage
PC board must be connected in order
for the inch down...

OPERATING INSTRUCTIONSB-5B-5
NA-5 
11. Set the travel speed as specified bythe procedures.  With the wire feeder
travel switch set to “Hand Travel”, the
travel runs without welding, permitting
accurate measurement of travel
speed.  When using a Lincoln travel
carriage, adjust the speed with the
rheostat and the direction with the
toggle switch on the carriage control
panel.
12. Connect the work lead to the work or a suitable piece of scrap.  Clip the
end of the electrode to a sharp point.
13. Preset the...

OPERATING INSTRUCTIONSB-6B-6
NA-5
The starting sequence is as described above
except that when the arc strikes, the
machine welds at the wire speed and
voltage set by the “Start Controls” panel until
the time set on the thumbwheel switch
elapses.  The circuit then automatically
switches to the “Welding Controls” wire
speed and voltage.  Actual settings depend
on application requirements.
Available options for applications with
particularly difficult starting.1. K238 High Frequency Generator - See IM305...

OPERATING INSTRUCTIONSB-7B-7
NA-5
Travel Starts Travel Stops Older ModelsNewer Models*
With “Start” With “Stop” Lead #691 to Pin 6
Button Button Lead #692 to Pin 5
With Arc Striking With Arc Stopping Lead #691 to Pin 6 Lead #692 to Pin 7
With Arc Striking With Stop Button Lead #691 to Pin 5 Lead #692 to Pin 7
With “Start” With End Crater Lead #691 to Pin 6
Button Fill Time (With Lead #692 to Pin 9
optional procedure
module installed in
crater receptacle
1)
With “Start” After Burnback Lead #691 to Pin 6...