Lincoln Electric DC-650 PRO IM463-A - Manual (Page 17)

SMAW (Stick) Operation
If welding electrode positive connect the electrode
cable to the
“ + ” output studs, and connect the work
cable to the “ - ” studs labeled “ SMAW,SAW ” . If
welding electrode negative, reverse the connections.
Do not make any connections to the center pair of
output studs.
Set the control panel switches as follows:
------------------------------------------------------------------------
Mode: SMAW
------------------------------------------------------------------------
Output Local or Remote (See “ Output Control
Control: Switch ” )
------------------------------------------------------------------------
LN-9/NA-5: Off
------------------------------------------------------------------------
Wire Feeder Has no effect in the SMAW mode.
Voltmeter:
------------------------------------------------------------------------
Output
Terminals:
On
------------------------------------------------------------------------
If using Local output control, preset the desired
welding voltage using the Output Potentiometer and
the voltmeter. If using Remote output control, preset
the welding voltage using a remote control.
Set the Arc Force potentiometer according to the arc
characteristics desired. With certain electrodes, such
as low hydrogen alloy electrodes, it is beneficial to set
the Arc Force to a high setting. This gives a more
forceful arc, less prone to sticking and stubbing.
Setting this control too high can lead to excessive
spatter. It is often best to start stick welding with the
Arc Force set to minimum, and if sticking is a problem,
raise the setting until the electrode runs smoothly.
The output terminals will always be “ hot ” . Before an
arc is struck, the ammeter will display the preset
current. When an arc is struck, the ammeter will
display the actual output current. In the SMAW mode,
the voltmeter always displays the output voltage
present at the output studs of the DC-650 PRO.
– 17 –
Operation with an LN-9 or NA-5 Wire
Feeder
NOTE: Conversion Kits are required for LN-9 ’ s and
NA-5 ’ s used with the DC-650 PRO.
For LN-9 and LN-9GMA model codes above 9100
order K442-1.
For LN-9 models below code 9100 order K442-2.
For NA-5 models below code 9100, order K442-3.
For NA-5 models above code 9100, order K442-4.
Setup and Operation
These wire feeders are called presettable wire
feeders. The welding voltage is set on the wire
feeder, and then maintained throughout the weld by
circuitry in the wire feeder. It makes continuous
adjustments during the weld to maintain the proper
arc voltage. Because the wire feeder takes control of
the arc voltage, the DC-650 PRO must be told that an
LN-9 or NA-5 is in control. This is done by setting the
LN-9/NA-5 On/Off switch to the
“ On ” position.
To use an LN-9 or NA-5, the Output Control switch
must be set to
“ Remote ” . Output voltage control is
now done through the terminal strip, or through the
wire feeder receptacle, rather than with the front panel
Output potentiometer. Additionally, the LN-9/NA-5
switch must be set to
“ On ” . This tells the DC-650
PRO that an LN-9 or NA-5 is in control. The DC-650
PRO Voltmeter will no longer display the preset
welding voltage. The preset welding voltage must be
read at the LN-9 or NA-5. The DC-650 PRO
Voltmeter will display
“ --- ” when not welding.
When welding, the Voltmeter displays the welding
voltage, as measured on the output studs of the DC-
650 PRO.This voltage may be higher than that
displayed on the LN-9 or NA-5, due to voltage drops
in the cables and cable connection points. The
ammeter displays the actual welding current.
Connection of the Work Lead (21)
In some applications, very precise arc voltage sensing
is required. This requires that the wire feeder arc
voltage sensing lead, number 21, be extended directly
to the workpiece. Instructions follow for extending that
lead.
When using the Wire Feeder Receptacle, extend the
21 lead to the workpiece as follows:
1. Turn the input power off.
2. Open the terminal strip door. When installing the
wire feeder, do not connect the lead marked 21
coming from the wire feeder control cable to the