Connections For Semi-Automatic Or Automatic Wire Feeder Control; Connecting The Na-3 Or Lt-7 To Ide- Alarc Dc-1000 - Lincoln Electric IDEALARC DC-1000 Service Manual

B-4
3. NA-5 - Set the DC-1000 mode switch to the
process being used - CV(I) Innershield or CV(S)
Sub Arc. Set the DC-1000 machine/remote switch
in the remote position. Set the OCV control four
volts higher than the welding voltage and the inch
speed at 1/2 the welding wire feed speed for the ini-
tial test weld. Adjust the OCV and inch speed as
required for optimum starting. Refer to the NA-5
instruction manual for data regarding the setup of
controls and modes on the NA-5.
4. LN-8 - Set the LN-8 mode switch (located on the
CC board) to the CV position. Set the DC-1000
mode switch on CV(I) Innershield or CV(S) Sub Arc
according to the process being used.
5. LN-7, LN-9 and other constant wire feed units -
Set the DC-1000 mode switch on CV(I) Innershield
or CV(S) Sub Arc according to the process being
used. If using an LN-9, refer to the LN-9 instruction
manual for further instructions on its use. If using an
LN-7, it will be necessary to use either a K775
Remote Control or operate the DC-1000 with the
machine/remote switch in the machine position.
NL Option Kit (Not Required with NA-3, NA-5, LT-7
or LT-56).
The K783 NL Option Kit (for field installation) is
designed to permit use of the obsolete NA-2, LAF-3,
LT-3 and LT-3 section of the LT-34 tractor. It provides
the necessary DC control power for the operation of
the equipment and the necessary circuitry for proper
inching, cold starting and arc striking. In using the NL
Option Kit, a K775 remote field control is required and
is included as part of the kit. Installation instructions
are included with the NL Option Kit.
CONNECTIONS FOR SEMI-AUTOMATIC
OR AUTOMATIC WIRE FEEDER CON-
TROL
1. Set the ON/OFF PUSH BUTTON to OFF.
2. Locate and open the hinged access door on the
Front Case Assembly.
3. Insert control cable through the strain relief box
connector and pull enough cable through to reach
the terminal strip.
4. Connect the automatic wire feeder control cable to
the terminal strip. See corresponding connection
diagram in this section of the manual, or the instruc-
tions included with the wire feeder.
5. Connect the wire feeder grounding wire to the chas-
sis ground screw marked with the symbol
OPERATION
NOTE: The IDEALARC
Circuit (at #31 and #32 on the terminal strip)
supplies 115-volt AC power to the wire feeding
equipment. The circuit has a 1000 volt ampere
rating. An 8-amp slow blow fuse on the
machineʼs control panel protects the auxiliary
power supply from excessive overloads or
short circuits.
CONNECTING THE NA-3 OR LT-7 TO IDE-
ALARC DC-1000
®
1. Disconnect main AC input power to the IDEALARC
DC-1000.
2. Set IDEALARC
TON to OFF.
3. Connect the wire feeder control cable leads to the
IDEALARC
Figure B.1.
FIGURE B.1 - NA-3 or LT-7 Wire Feeder
Connection to the IDEALARC
4. Connect the wire feeder control cable ground lead
to the frame terminal marked
The IDEALARC
____________________________________________________
.
IDEALARC ® DC-1000
® DC-1000 Auxiliary Power
DC-1000 ON/OFF PUSH BUT-
®
® DC-1000 terminal strip as shown in
® DC-1000
.
CAUTION
DC-1000 must be properly grounded.
®
B-4
®