Lincoln Electric SVM166-A service manual General Description

B-3 OPERATION B-3

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GENERAL DESCRIPTION

The LN-15 is a light weight, portable, durable semi- automatic wire feeder.

The LN-15 accommodates spools 8" (200mm) diame- ter up to 4" (100mm) wide.

The domestic feeders comes factory equipped with a K1500-2 Magnum Tweco-compatible style #2-#4 gun bushing. Other K1500 series gun bushings are avail- able as field installed options. European models are factory equipped with a Fast-Mate adapter.

The wire drive is capable of operating in either a "CV" or "CC" mode. A constant voltage (CV) power source is recommended for flux-cored arc welding (FCAW) and gas metal arc welding (GMAW) to obtain code quality results. However, the LN-15 may also be used with a constant current (CC) power source to obtain passable results for non-critical quality applications.

The “dual procedure” mode drops the WFS to 83% of the original set point. The voltage setting remains the same.

•Burn-back is adjustable from 0.0 to 0.25 seconds, with a default of 0.00 seconds.

•The preflow time is adjustable from 0.00 to 2.50 sec- onds, with a default of 0.00 seconds.

•The postflow time is adjustable from 0.0 to 10.0 sec- onds, with a default setting of 0.0 seconds.

The Across the Arc Model is capable of operating with Lincoln DC power sources supplying between 15VDC and 110 VDC. Simply attach the work clip to the work piece and then connect the LN-15 to the electrode cable to the power source and it is ready to weld.

An internal contactor in Across the Arc Models ener- gizes the electrode output in response to the gun trig- ger.

DUTY CYCLE

The LN-15 wire feeders are intended for semi-auto- matic use. The maximum rating of the LN-15 is based upon a 60% duty cycle; welding 6 minutes of welding followed by 4 minutes of idling within a 10 minute peri- od.

RECOMMENDED PROCESSES

The LN-15 wire drive feeds electrode for various processes as follows:(See Table B.1)

The Across the Arc Model is suitable for GMAW, GMAW-Pulse and FCAW semi-automatic applications within the rated duty cycle.

PROCESS LIMITATIONS

•The across the arc model is not recommended for spot or stitch welding.

•The across the arc model is not recommended for GMAW-STT, SAW, SMAW, GTAW or CAG.

EQUIPMENT LIMITATIONS

Codes 10864, 10865

•The LN-15 cannot be used with K489-7 Fast Mate Gun receiver bushing or K1500-4 gun adapter bush- ing.

Codes 11033 and higher

•The LN-15 cannot be used with the K1500-4 gun adapter bushing.

OPERATIONAL FEATURES AND CONTROLS

•Built in flow meter for adjusting shielding gas.

•Cold Feed/Gas Purge switch.

•2 step/Trigger Interlock switch (codes 11033 and above only.)

•Digital wire feed speed control.

•Digital display of welding voltage.

•Adjustable preflow and postflow times

•Adjustable burnback times.

•On/Off switch (codes 11033 and above only.)

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TABLE B.1

Process	Wire Diameter Range			Wire Feed Speed Range
GMAW	0.023 - 0.052"	(0.6 - 1.3 mm)	50	- 700 ipm	(1.3 - 17.8	m/minute)
FCAW	0.045 - 0.052"	(1.2 - 1.3 mm)	50	- 700 ipm	(1.3 - 17.8	m/minute)
FCAW	1/16 - 5/64"	(1.6 - 2.0 mm)	50	- 400 ipm	(1.3 - 10.2 m/minute)

LN-15