Operation, General description – Lincoln Electric LN-25 SVM179-B User Manual
Page 17
OPERATION
B-3
B-3
LN-25™ PRO
DEFINITION OF WELDING TERMS
WFS
• Wire Feed Speed
CC
• Constant Current
CV
• Constant Voltage
GMAW
• Gas Metal Arc welding
SMAW
• Shielded Metal Arc welding
FCAW
• Flux Core Arc Welding
GENERAL DESCRIPTION
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.
General Functional Description
The LN-25™ PRO as designed is a simple, robust
feeder. Standard features include a calibrated wire
feed speed dial, 2 step/trigger interlock switch, CV-CC
switch, Gas Purge and Cold Feed. Some newer codes
also have a Wire Speed range switch for more precise
setting at lower speeds.
RECOMMENDED PROCESSES
• GMAW
• FCAW
PROCESS LIMITATIONS
• GMAW-P procedures must be qualified by the cus-
tomer.
• Across-the-Arc models are not recommended for
stitch or spot welding.
EQUIPMENT LIMITATIONS
• 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
• CV-400
• CV-655
• DC-400
• DC-600
• DC-655
• Invertec V-350 PRO
• Invertec V-450 PRO
• Multi-Weld 350
• Ranger 10,000
• Ranger 3 Phase
• Ranger GXT
• Ranger 250
• Ranger 305
• SAE-400
• Pipeliner 200G
• Classic 300
• Vantage 300
• Vantage 400
• Vantage 500