Lincoln Electric IDEALARC DC-1500 Service Manual page 17

B-5
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 operating
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
Single
Innershield
Equipment and Stickout
Control Settings under 1 3 /
Wire Feed Type NA-3S
Control or NA-5
NA-3N
NA-3S VV Board
CV —
Mode Switch
NA-3 Inch Speed
2 —
Dial Setting (5)
NA-5 Arc Striking — (4)
Wire Speed (5)
NA-3 OCV Control —
(5)
(6)
NA-5 Arc Striking (4)
—
Volts Control
NA-3 Start Board —
(2)
DC-1500 Output
Control Switch — Remote
Machine or Remote
DC-1500
CV
Mode
Innershield
Switch
DC-1500 Output
Inoperative
Control
(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.
Exact dial setting depends on cable size and length, carbon size, etc.
(5)
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
(6)
on page 7.
OPERATION
INNERSHIELD
Single
Innershield
Stickout Twinarc
4 " over 1 3 / 4 " Innershield
NA-3S NA-3S
or NA-5 or NA-5 NA-3S
NA-3N NA-3N
CV — CV —
2 — 2 —
— (4) — (4)
— —
(6) (6)
(4) (4)
— —
Req'd — Req'd —
(2) (2)
Remote Remote
CV CV
Innershield Innershield
Inoperative Inoperative
IDEALARC® DC-1500
b. If striking is still not satisfactory, see the NA-5 op-erat-
ing manual for information on the feed motor acceler-
ation.
c. If installed, adjust the "Start Controls" to set the weld-
ing 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 replaced.
d. If installed, adjust the "Crater Controls" to set the
welding procedures for the set time after the stop but-
ton 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 char-
acteristics needed.
SUBMERGED ARC
Single
Solid Wire Tiny Twin 1 / 16 1)
NA-5 NA-3S NA-5 NA-3S
CV — CV —
2 — 2 —
— (4) — (4)
— —
(6) (6)
(4) (4)
— —
— —
(2) (2)
Remote Remote
CV Submerged CV
Arc (3) Innershield
Inoperative Inoperative
High Current
Tiny Twin Very Large
Over 1 / 16 Puddle
NA-5 NA-3S NA-5
CV — VV —
2 — 2 —
— (4) — (4)
— 6.5 - 7.0 —
(6)
(4) (4)
— —
— —
(2) (2)
Remote Remote
NA-3S NA-5
CV Submerged
Arc (3)
CC CVS
Inoperative Inoperative
B-5