Lincoln Electric SVM 122-A NA-5 Automative Wire Feeder, LN-8 Semiautomatic Wire Feeder

B-8 B-8

OPERATION

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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.

IDEALARC DC-400

LINCOLN ®

ELECTRIC