Operation – Lincoln Electric IDEALARC SVM 122-A User Manual
Page 22
4.
Turn the Start Board Timer to maximum.
5.
Set Start Board current and voltage control.
a.
Set the Start Board current control to 1-1/2
dial numbers below that set on the NA-3 cur-
rent control.
b.
Set the Start Board voltage control equal with
the NA-3 voltage control setting.
NOTE: These Start Board current and voltage set-
tings result in a start up current that is
lower than the NA-3 current setting and
approximately equal with the NA-3 voltage
setting for the desired welding procedure.
6.
Establish the correct arc striking procedure with
the NA-3 Start Board timer set at maximum.
a.
For the best starting performance, the NA-3
Open Circuit Voltage Control and Voltage
Control setting should be the same. Set the
Inch Speed Control for the slowest inch speed
possible.
b.
To adjust the Open Circuit Voltage Control to
get the best starting performance, make
repeated starts observing the NA-3 voltmeter.
When the voltmeter pointer swings smoothly up to
the desired arc voltage, without undershooting or
overshooting the desired arc voltage, the Open
Circuit Voltage Control is set properly.
If the voltmeter pointer overshoots the desired
voltage and then returns to the desired voltage,
the Open Circuit Voltage Control is set too high.
This can result in a bad start where the wire tends
to “blast off.”
If the voltmeter pointer hesitates before coming up
to the desired voltage, the Open Circuit Voltage
Control is set too low. This can cause the elec-
trode to stub.
c.
Set NA-3 Start Board current and voltage as
close to the welding procedure current and
voltage as possible.
NOTE: The Start Board current and voltage
should be as close as possible to the
welding procedure current and voltage,
while still getting satisfactory starts.
d.
Set the start time to as low a time as possible
while still getting satisfactory starts.
7.
Start and make the weld.
NA-5 AUTOMATIVE WIRE FEEDER
When using the Idealarc DC-400 with the NA-5 wire
feeder, set the controls on the Idealarc DC-400 as fol-
lows for the best performance:
1.
Turn OFF main AC input power to the Idealarc DC-
400.
2.
Connect the electrode cables to the terminal
polarity to be used.
3.
Set the VOLTMETER “+” or “-” switch to the same
polarity as the electrode cable connection.
4.
Set the OUTPUT CONTROL switch to “Remote.”
5.
Set the OUTPUT TERMINALS switch to “Remote.”
6.
Set the Idealarc DC-400 welding MODE switch to
the position that matches the welding process
being used.
a.
For submerged arc welding, set welding
MODE SWITCH TO CV SUBMERGED ARC
position.
b.
For all open arc welding processes, set weld-
ing MODE switch TO CV FCAW/GMAW posi-
tion.
7.
Set the ARC CONTROL to midrange, 3. After
welding starts, adjust as necessary.
LN-8 SEMIAUTOMATIC WIRE FEEDER
To use the LN-8 Semiautomatic Wire Feeder with the
Idealarc DC-400:
1.
Set the Idealarc DC-400 welding MODE switch to
either CV FCAW/GMAW mode or CV Submerged
Arc mode, depending on the welding process
being used.
2.
Set the Idealarc DC-400 OUTPUT CONTROL
switch to “Remote.”
3.
Set the OUTPUT TERMINALS switch to “Remote.”
4.
Set the ARC CONTROL to midrange, 3.
5.
Set the LN-8 Welding Mode switch to the CV posi-
tion. The LN-8 Welding Mode switch is located on
the variable voltage (CC) board.
6.
Refer to the LN-8 Operator’s Manual for instruc-
tions on how to use the LN-8.
OPERATION
B-8
B-8
LINCOLN
®
ELECTRIC
IDEALARC DC-400