Lincoln Electric SVM179-B service manual General Description

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B-3	OPERATION	B-3
DEFINITION OF WELDING TERMS	General Functional Description
WFS	The LN-25™ PRO as designed is a simple, robust
	feeder. Standard	features include a calibrated wire
• Wire Feed Speed
	feed speed dial, 2 step/trigger interlock switch, CV-CC
CC	switch, Gas Purge and Cold Feed. Some newer codes
	also have a Wire Speed range switch for more precise
• Constant Current
	setting at lower speeds.
CV
• Constant Voltage	RECOMMENDED PROCESSES
GMAW	• GMAW
• Gas Metal Arc welding	• FCAW
SMAW	PROCESS LIMITATIONS
• Shielded Metal Arc welding
FCAW	• GMAW-P procedures must be qualified by the cus-
	tomer.
• Flux Core Arc Welding	• Across-the-Arc	models are not recommended for

stitch or spot welding.

GENERAL DESCRIPTION

EQUIPMENT LIMITATIONS

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General Physical Description

The LN-25™ PRO is specially engineered to be the most rugged portable wire feeder available. The mod- els covered by this manual are designed for “across the arc” operation only.

Several models of the LN-25™ PRO are offered to best meet individual welder needs. The Extra Torque model features additional torque gearing for reliable feeding of large diameter FCAW wires. The Standard model features wire drive gearing for optimal perfor- mance for both FCAW and GMAW wires of common sizes. All of the models include a gas solenoid and flow meter for the flexibility to run most wire processes. The plastic case is molded from a high impact, flame retardant plastic for durability and low weight. The patent pending design keeps the internal components protected and dry.

The heart of the LN-25™ PRO is the 2 roll MAX- TRAC™ drive. The patented features on the wire drive offer tool-less changing of the drive rolls and wire guides for quick spool changes. A tachometer con- trolled motor powers the patent pending drive rolls for smooth, steady feeding without slippage.

With only one p.c. board, the LN-25™ PRO is designed to be simple, reliable and easy to service. The p.c. board is mounted with Lincoln’s leading envi- ronmental design protection that consists of mounting the board in a plastic tray and potting it with epoxy.

With a 325 amp 100% duty cycle rating, these feeders are ready for heavy duty welding.

•The duty cycle of the wire feeder is 325A, 100% and 450A, 60%. Duty cycle is based upon the amount of welding performed in a 10 minute period.

•The maximum spool size is 45 lb, 12" diameter.

•Maximum FCAW gun length is 15 ft.

•Maximum GMAW gun length is 25 ft.

•Push-pull guns do not work with the wire feeder.

•K2330-1 Timer kits do not work with this feeder, use K2330-2 kits

RECOMMENDED POWER SOURCES

• CV-305	• Ranger 3 Phase
• CV-400	• Ranger GXT
• CV-655	• Ranger 250
• DC-400	• Ranger 305
• DC-600	• SAE-400
• DC-655	• Pipeliner 200G
• Invertec V-350 PRO	• Classic 300
• Invertec V-450 PRO	• Vantage 300
• Multi-Weld 350	• Vantage 400
• Ranger 10,000	• Vantage 500

LN-25™ PRO