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RETURN TO MAIN INDEX
SVM114-C
™
July, 2008
LN-25 PORTABLE CV/CC
SEMIAUTOMATIC WIRE FEEDER
For use with machines having Code Numbers:
9218 10556
11144
9219 10557
11145
9220 10558
11282
9383 11144
11283
9810 11145
9811 11282
Safety Depends on You
9812 11283
Lincoln arc welding and cutting equip-
ment is designed and built with safety in
mind. However, your overall safety can
be increased by proper installation ...
and thoughtful operation on your part.
DO NOT INSTALL, OPERATE OR
REPAIR THIS EQUIPM
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ii ii SAFETY WARNING CALIFORNIA PROPOSITION 65 WARNINGS Diesel engine exhaust and some of its constituents The engine exhaust from this product contains are known to the State of California to cause can- chemicals known to the State of California to cause cer, birth defects, and other reproductive harm. cancer, birth defects, or other reproductive harm. The Above For Diesel Engines The Above For Gasoline Engines ARC WELDING can be hazardous. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJU
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iiii iiii SAFETY ELECTRIC SHOCK can kill. ARC RAYS can burn. 3.a. The electrode and work (or ground) circuits 4.a. Use a shield with the proper filter and cover are electrically “hot” when the welder is on. plates to protect your eyes from sparks and Do not touch these “hot” parts with your bare the rays of the arc when welding or observing skin or wet clothing. Wear dry, hole-free open arc welding. Headshield and filter lens gloves to insulate hands. should conform to ANSI Z87. I standards. 3.b
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iiiiii iiiiii S SA AF FE ET TY Y WELDING and CUTTING CYLINDER may explode SPARKS can if damaged. cause fire or explosion. 7.a. Use only compressed gas cylinders 6.a. Remove fire hazards from the welding area. containing the correct shielding gas for the If this is not possible, cover them to prevent process used and properly operating the welding sparks from starting a fire. regulators designed for the gas and Remember that welding sparks and hot pressure used. All hoses, fittings, etc. should b
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iiv v iiv v S SA AF FE ET TY Y 6. Eloigner les matériaux inflammables ou les recouvrir afin de PRÉCAUTIONS DE SÛRETÉ prévenir tout risque d’incendie dû aux étincelles. Pour votre propre protection lire et observer toutes les instructions 7. Quand on ne soude pas, poser la pince à une endroit isolé de et les précautions de sûreté specifiques qui parraissent dans ce la masse. Un court-circuit accidental peut provoquer un manuel aussi bien que les précautions de sûreté générales suiv- échauffement
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v v MASTER TABLE OF CONTENTS FOR ALL SECTIONS Page Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i-iv Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section A Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section B Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Section A Section A TABLE OF CONTENTS - INSTALLATION SECTION - Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section A Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3 Power Source Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
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A-2 A-2 INSTALLATION TECHNICAL SPECIFICATIONS – LN-25™ OPERATING V VO OL LT T ARC A AG GE E VOLTAGE Constant Voltage (CV) or 15-40 VDC (110VDC Maximum OCV) Constant Current (CC) R RRA A AT TTED CURRENT E ED D C CU UR RR RE EN NT T Rated current without contactor 500 Amps 60% Duty Cycle Rated current with contactor 300 Amps 60% Duty Cycle W W WIRE SPEED IIR RE E F FE EE ED D RANGE S SP PE EE ED D 50 – 700 Inches Per Minute (IPM) RECOMMENDED W WIIR RE E ELECTR D DIIA AM ME EODE W T TE ER RS S
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A-3 A-3 INSTALLATION SAFETY PRECAUTIONS WARNING WARNING ELECTRIC SHOCK can kill. Unless an optional output control or contactor is used • Do not operate with covers with the LN-25™, the electrode circuit (including removed. welding wire, wire drive and welding gun) is electrically hot when the welding power source is on. • Turn off power source before The gun trigger controls wire feed only. installing or servicing. Disconnect or shut off welding power source before • Do not touch electrically m
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A-4 A-4 INSTALLATION c. Place “Set to Same Polarity As Electrode Cable “POSITIVE”. For electrode positive welding, Connection” switch at appropriate position. interchange the above lead connections so the LN-25™ electrode lead is then connected to the d. Place power source toggle switch in “Output positive power source terminal. Control at DC(CV) -400™” position, unless a remote control is connected to 75, 76 and 77 on b. Place both switches on the CV Adapter to the CV the power source terminal
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A-5 A-5 INSTALLATION 5 Install the barbed fitting and union nut to the ⁄8-18 WIRE FEED DRIVE ROLL AND female inert gas fitting on the front panel of the LN- GUIDE TUBE KITS 3 25™ case. Connect the ⁄16" I.D. gas hose from the gun cable to the barbed fitting. WARNING When the gun is to be removed, this fitting can be easily detached by loosening the union nut. Turn off power source before installing or changing drive roll and/or guide tubes. WELD CABLE CONNECTION The size of the electrode cable an
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A-6 A-6 NOTES LN-25™ Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC
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Section B Section B TABLE OF CONTENTS - OPERATION SECTION - Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section B Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2 Recommended Processes and Equipment . . . . . . . . . . . . . . . . . . . . . . . B-2 Welding Capability
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B-2 B-2 OPERATION GENERAL DESCRIPTION SAFETY PRECAUTIONS The LN-25™ is a lightweight portable semiautomatic READ AND UNDERSTAND ENTIRE SECTION wire feeder designed for “across-the-arc” operation BEFORE OPERATING MACHINE without a control cable on most any DC welding power source. Simply connect the LN-25™ to the electrode cable, clip it to Work and it is ready to weld, using up to 30 lb. coils or spools. WARNING The wire drive, controls and wire reel are fully enclosed in a rugged molded plastic
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B-3 B-3 OPERATION LN-25™ INSTRUMENTS AND NOTE: CONTROLS 1. The Voltmeter will read zero if the LN-25™ work clip lead is not connected to work, even if the Refer to Figure B.1 for control locations. elect rode is electrically “hot” to work. FIGURE B.1 – CONTROL LOCATIONS. 2. The Voltmeter will read below zero if the LN-25™ polarity switch is not set to the same polarity as the electrode. REMOTE
WIRE SPEED
ARC VOLTAGE
DIAL RANGE
CONTROL
SWITCH 3. The Voltmeter will read power source open circ
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B-4 B-4 OPERATION WORK CLIP LEAD AWG Maximum Length #14 25 Ft (7.6m) WARNING #12 50 Ft (15.2m) #10 100 Ft (30.5m) ELECTRIC SHOCK can kill. #6 200 Ft (61m) • Do not touch metal portions REMOTE ARC VOLTAGE CONTROL (OPTIONAL) of the LN-25™ lead clip when welding power source is on. This rheostat control allows you to control the power source output arc voltage level. Refer to K444, K444-1 and K444-2 Remote Voltage Kits in the Accessories section. WARNING GAS FITTING (OPTIONAL) Provides gas output c
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B-5 B-5 OPERATION ® g. To remove Readi-Reel from Adapter, depress re- SEQUENCE OF OPERATION taining spring tab with thumb while pulling the ® Readi-Reel cage from the molded adapter with LOADING ELECTRODE both hands. It is not necessary to remove adapter from spindle. WARNING h. Load wire into wire drive per Loading Wire Drive ELECTRIC SHOCK can kill. Section. • Unless an optional output control or internal contactor is MOUNTING 10 TO 30 LB SPOOLS used with the LN-25™, the electrode circuit is
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B-6 B-6 OPERATION ® FIGURE B.2 – READI-REEL INSTALLATION. 2" O.D. MOLDED ADAPTER SPINDLE RETAINING SPRING THREAD LOCKING COLLAR BRAKE HOLDING PIN (MUST ENGAGE HOLE IN ADAPTER RIB) GROOVES READI-REEL INSIDE CAGE WIRES f. Inch the electrode through the gun. LOADING WIRE DRIVE g. Adjust the brake tension with the thumbscrew on a. Turn the reel or spool until the free end of the the spindle hub until the reel turns freely, but with electrode is accessible. little or no overrun when wire feeding is s
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B-7 B-7 OPERATION screw in the gearbox conductor block and pull the FIGURE B.3 – CC WIRE SPEED SETTING. gun cable forward about six inches. There should DESIRED IN/MIN ARC VOLTS USED be a slight waviness in the exposed wire. If there is no waviness, the pressure is too low. Increase 35 700 1 the pressure setting ⁄4 turn, lock the gun cable in 650 place and repeat the above steps. 31 600 29 PRESETTING WIRE FEED SPEED 550 27 500 The LN-25™ permits accurate presetting of the 25 desired wire feed sp
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B-8 B-8 OPERATION FIGURE B.4 – VV (CC) WIRE SPEED SETTING. MAKING A WELD SETUP Arc Volts Used Desired a. Connect work cable to metal to be welded. Work In/Min 16 18 20 22 24 26 28 30 32 34 cable must make good electrical contact to the 50 109 97 88 80 73 67 63 58 55 51 work. The work must also be grounded as stated 60 131 117 105 95 88 81 75 70 66 62 in “Arc Welding Safety Precautions.” 70 153 136 123 111 102 94 88 82 77 72 80 175 156 140 127 117 108 100 93 88 82 b. Check that the LN-25™ is prop
