LN-8 or LN-9 SEMI-AUTOMATIC Wire Feeder

B-9

OPERATION

B-9

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3.Run a test weld. Set proper current, voltage, and travel speed.

•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.

•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 volt- age and then returns back 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 electrode to stub.

4.Start and make the weld.

•Cold starts. For cold starts, be sure the work piece is clean and the electrode makes positive contact with the work piece.

•Hot "On the Fly" starts. For hot starts, travel should begin before the wire contacts the work piece.

ARC STRIKING WITH DC-600 AND THE NA-3 OR NA-5 START BOARD

When electrical stickout exceeds 1 3/4” (44.4mm) the optional Start Board (K221 for the NA-3 and K334 for the NA-5) may be required to improve arc striking.

See the NA-3 or NA-5 Operator’s Manual for detailed instructions on setting the Start Circuit controls.

To use the LN-8 or LN-9 Semi-Automatic Wire Feeder with the IDEALARC DC-600

1.Set the IDEALARC DC-600 WELDING MODE SWITCH to either CV Innershield mode or CV Submerged Arc mode depending on the welding process being used.

2.Connect the LN-8 or LN-9 Control Cable to the 14 pin Amphenol of the DC-600.

3.Connect the #21 work lead (on T.S.2) to the same polarity as the work cable connection or follow instructions on the Connection Diagram (S22977) for remote connection (recommend- ed) of the #21 lead.

4.Connect the electrode cables to terminal polarity to be used.

2.Set the IDEALARC DC-600 OUTPUT CONTROL SWITCH to the REMOTE position.

3.Set the LN-8 Welding Mode Switch to the CV or VV position. The LN-8 Welding Mode Switch is located on the variable voltage (CC) board.

4.Refer to the LN-8 Operator’s Manual for instruc- tions on how to use the LN-8 in the CC (VV) mode.

LN-7 AND OTHER CONSTANT WIRE FEEDERS

To use the LN-7 or other constant wire feed speed semi-automatic wire feeders with IDEALARC DC-600

1.Set the IDEALARC DC-600 WELDING MODE SWITCH to either CV Innershield mode or CV Submerged Arc mode depending on the welding process being used.

2.Connect the Wire Feeder Control Cable to the 14 pin Amphenol of the DC-600.

3.Connect the #21 work lead (on T.S.2) to the same polarity as the work cable connection or follow instructions on the Connection Diagram (S22978) for remote connection (recommend- ed) of the #21 lead.

4.Connect the electrode cables to terminal polarity to be used.

5.Set the IDEALARC DC-600 OUTPUT CONTROL SWITCH per the Connection Diagram for the feeder being used

NOTE: Older Lincoln control cables that do not have an Amphenol connector on the Power Source end can be connected to the T.S.1 & T.S.2 terminal strips behind the DC-600 nameplate. See the Installation section of this manual and the appropriate Connection Diagram.

DC-600