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INNERSHIELD SUBMERGED ARC
Single Single
Innershield Innershield High Current
Equipment and Stickout Stickout Twinarc Single Tiny Twin Very Large
Control Settings under 1
3
/
4
” over 1
3
/
4
” Innershield Solid Wire Tiny Twin
1
/
16(1)
Over
1
/
16
Puddle
Wire Feed Type NA-3S NA-3S NA-3S
Control or NA-5 or NA-5 or NA-5 NA-3S NA-5 NA-3S NA-5 NA-3S NA-5 NA-3S NA-5
NA-3N NA-3N NA-3N
NA-3S VV Board
Mode Switch
CV — CV — CV — CV — CV — CV — VV —
NA-3 Inch Speed
Dial Setting
(5)
2—2—2—2— 2—2— 2—
NA-5 Arc Striking —
(4)
—
(4)
—
(4)
—
(4)
—
(4)
—
(4)
—
(4)
Wire Speed
(5)
NA-3 OCV Control
(5)
(6)
—
(6)
—
(6)
—
(6)
—
(6)
—
(6)
— 6.5 - 7.0 —
NA-5 Arc Striking
(4) (4) (4) (4) (4) (4) (4)
Volts Control
——— — — — —
NA-3 Start Board
(2)
— Req’d
(2)
— Req’d
(2)
—
(2)
—
(2)
—
(2)
—
(2)
—
DC-1500 Output
Control Switch — Remote Remote Remote Remote Remote Remote Remote
Machine or Remote
DC-1500
CV CV CV CV Submerged CV CV Submerged
NA-3S NA-5
Mode
Innershield Innershield Innershield Arc
(3)
Innershield Arc
(3)
CC CVS
Switch
DC-1500 Output
Inoperative Inoperative Inoperative Inoperative Inoperative Inoperative Inoperative
Control
OPERATING INSTRUCTIONS
b. If striking is still not satisfactory, see the NA-5 op-
erating manual for information on the feed motor
acceleration.
c. If installed, adjust the “Start Controls” to set the
welding procedures for the time set on the timer to
provide the bead size, penetration, or other factor
as needed for the application. If not used, this board
should be disconnected and the jumper plug re-
placed.
d. If installed, adjust the “Crater Controls” to set the
welding procedures for the set time after the stop
button is pressed to provide the bead size or fill the
crater as needed for the application. If not used,
this board should be disconnected and the jumper
plug replaced.
e. Set the “Burnback Time” to provide the stopping
characteristics needed.
General Set-Up Procedures When Using DC-1500 and
Lincoln Automatic Head NA-5
(See chart below.)
1. Install the NA-5 per the information in the NA-5 op-
erating manual (IM-305). Connect the NA-5 to the
DC-1500 as described on the connection diagram.
2. Place the DC-1500 mode switch in the proper position
according to the process and procedure to be used.
3. Place the machine/remote switch in remote.
4. Connect the work lead to the work or a suitable piece
of scrap. Clip the end of the electrode to a sharp point.
5. Preset the Start (if used), Weld and Crater (if used)
Controls to the wire speed and voltage specified in the
procedure.
6. Make several test welds, readjusting the starting and
stopping controls in the following order:
a. Set the Arc Striking Wire Speed and Volts Controls
for optimum arc striking. For initial test welds, set
the NA-5 arc striking wire speed control to 1/2 the
weld wire feed speed and the arc striking voltage
control 4 volts above the weld voltage.
RECOMMENDED SET-UP PROCEDURES FOR NA-3/DC-1500, NA-5/DC-1500
(1)
Starting is best with “hot” starting. Start button is pressed with wire above the work.
(2)
If an Na-3 start board is called for, refer to page 7 for details on how to set the controls. If an NA-3 start board is not required, it
should be electrically disconnected and the jumper plug replaced.
(3)
Some high speed welding procedures may perform better on the CV Innershield mode. Merely change the switch between CV Innershield
and CV Submerged arc position and select the best welding.
(4)
The NA-5 arc striking wire speed should initially be set at 1/2 the welding wire feed speed, and the NA-5 arc striking volts control 4
volts above the welding voltage. These controls can be adjusted as required for optimum arc striking.
(5)
Exact dial setting depends on cable size and length, carbon size, etc.
(6)
Set the OCV control to the same dial setting as the NA-3 voltage control. For initial test welds, choose the setting based on the table
on page 7.
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