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IM620-B
LN-25 PORTABLE CV/CC
November, 2006
SEMIAUTOMATIC WIRE FEEDER
For use with machines having Code Number 10556 11144
10557 11145
10558 11282
11283
Safety Depends on You
Lincoln arc welding and cutting
equipment is designed and built with
safety in mind. However, your overall
safety can be increased by proper
installation ... and thoughtful opera-
tion on your part. DO NOT
INSTALL, OPERATE OR REPAIR
THIS EQUIPMENT WITHOUT
READING THIS MANUAL AND
THE SAFETY PRECAUTIONS
CONTAINED THROUGHOUT.
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i i SAFETY WARNING CALIFORNIA PROPOSITION 65 WARNINGS Diesel engine exhaust and some of its constituents The engine exhaust from this product contains chemi- are known to the State of California to cause cancer, cals known to the State of California to cause cancer, birth defects, and other reproductive harm. 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 INJURY
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ii ii 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-freegloves open arc welding. Headshield and filter lens to insulate hands. should conform to ANSI Z87. I standards. 3.b. Ins
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iii iii SAFETY WELDING SPARKS can CYLINDER may explode cause fire or explosion. if damaged. 6.a. Remove fire hazards from the welding area. 7.a.Use only compressed gas cylinders If this is not possible, cover them to prevent containing the correct shielding gas for the the welding sparks from starting a fire. process used and properly operating Remember that welding sparks and hot regulators designed for the gas and materials from welding can easily go through small cracks pressure used. All hos
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iv iv SAFETY PRÉCAUTIONS DE SÛRETÉ 7. Quand on ne soude pas, poser la pince à une endroit isolé de la masse. Un court-circuit accidental peut provoquer un échauffe- Pour votre propre protection lire et observer toutes les instructions et ment et un risque d’incendie. les précautions de sûreté specifiques qui parraissent dans ce manuel aussi bien que les précautions de sûreté générales suivantes: 8. S’assurer que la masse est connectée le plus prés possible de la zone de travail qu’il est pratiqu
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v v for selecting a QUALITY product by Lincoln Electric. We want you to take pride in operating this Lincoln Electric Company product Thank You ••• as much pride as we have in bringing this product to you! Please Examine Carton and Equipment For Damage Immediately When this equipment is shipped, title passes to the purchaser upon receipt by the carrier. Consequently, Claims for material damaged in shipment must be made by the purchaser against the transportation company at the time the shipment
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TABLE OF CONTENTS SAFETY ..............................................................................................................................................................i-iv INSTALLATION ....................................................................................................................................SECTION A Technical Specifications .................................................................................................................................A-1
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INSTALLATION A-1 A-1 TECHNICAL SPECIFICATIONS – LN-25 OPERATING ARC VOLTAGE VOLTAGE Constant Voltage (CV) or 15-40 VDC (110VDC Maximum OCV) Constant Current (CC) RATED CURRENT RATED C CURRENT Rated current without contactor 500 Amps 60% Duty Cycle Rated current with contactor 300 Amps 60% Duty Cycle WIRE SPEED RANGE WIRE F FEED S SPEED 50 – 700 Inches Per Minute (IPM) RECOMMENDED ELECTRODE WIRE SIZES WIRE D DIAMETERS 1 .023” to ⁄16” SOLID STEEL WIRE 5 .045” to ⁄64” CORED WIRE 1 .035” to ⁄16” ALU
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INSTALLATION A-2 A-2 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 welding removed. wire, wire drive and welding gun) is electrically hot when the welding power source is on. The gun trigger • Turn off power source before controls wire feed only. installing or servicing. Disconnect or shut off welding power source before • Do not touch electrically ma
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INSTALLATION A-3 A-3 c. Place “Set to Same Polarity As Electrode Cable c. Set ELECTRODE POLARITY switch to constant Connection” switch at appropriate position. voltage polarity required by electrode. d. Place power source toggle switch in “Output d. Set toggle switch to “Constant Voltage” and set Control at DC(CV) -400” position, unless a the Constant Voltage Control on welder and the remote control is connected to 75, 76 and 77 on portable field control on #5 for initial start. the power source
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A-4 INSTALLATION A-4 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 GUIDE TUBE KITS 3 LN-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 and
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OPERATION B-1 B-1 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 c
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OPERATION B-2 B-2 NOTE: LN-25 INSTRUMENTS AND 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. electrode is electrically “hot” to work. REMOTE WIRE SPEED 2. The Voltmeter will read below zero if the LN-25 ARC VOLTAGE DIAL RANGE polarity switch is not set to the same polarity as CONTROL SWITCH the electrode. (OPTIONAL) 3. The Voltmeter will read power source open WIRE SPEED circuit voltage when th
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OPERATION B-3 B-3 The volts marks around the HI range calibrated dial When used with a K460-1 Pulse Power Adapter Kit, indicate the minimum arc volts required to obtain the the LN-25 does not need a clip lead. indicated HI range wire feed speeds. For example; if wire speed is set to 400 in/min., a welding NOTE: The clip lead also serves as a work sensing procedure arc voltage of at least 17V would be lead for the LN-25 Voltmeter (if installed). If the clip required to obtain the 400 in/min. wire
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OPERATION B-4 B-4 g. To remove Readi-Reel from Adapter, depress re- SEQUENCE OF OPERATION taining spring tab with thumb while pulling the LOADING ELECTRODE Readi-Reel cage from the molded adapter with both hands. It is not necessary to remove WARNING adapter from spindle. ELECTRIC SHOCK can kill. h. Load wire into wire drive per Loading Wire Drive Section. •Unless an optional output control or internal contactor MOUNTING 10 TO 30 LB SPOOLS is used with the LN-25, the electrode circuit is electri
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OPERATION B-5 B-5 FIGURE B.2 READI-REEL INSTALLATION MOLDED ADAPTER 2" O.D. SPINDLE RETAINING SPRING BRAKE HOLDING PIN (MUST ENGAGE HOLE IN ADAPTER RIB) GROOVES READI-REEL INSIDE CAGE WIRES THREAD LOCKING COLLAR LOADING WIRE DRIVE f. Inch the electrode through the gun. a. Turn the reel or spool until the free end of the g. Adjust the brake tension with the thumbscrew on electrode is accessible. the spindle hub until the reel turns freely, but with little or no overrun when wire feeding is b. Whi
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OPERATION B-6 B-6 3. If the only result is drive roll slippage, shut off the power source, then loosen the gun cable clamping screw in the gearbox conductor block and pull the gun cable forward about six inches. There should be a slight waviness in the exposed wire. If there is no waviness, the pressure is too low. Increase the pressure 1 setting ⁄4 turn, lock the gun cable in place and repeat the above steps. PRESETTING WIRE FEED SPEED The LN-25 permits accurate presetting of the desired wire f
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OPERATION B-7 B-7 MAKING A WELD Arc Volts Used The serviceability of a product or structure utilizing Desired In/Min 16 18 20 22 24 26 28 30 32 34 the LN-25 wire feeder is and must be the sole responsibility of the builder/user. Many variables 50 109 97 88 80 73 67 63 58 55 51 beyond the control of The Lincoln Electric Company 60 131 117 105 95 88 81 75 70 66 62 affect the results obtained in using the LN-25 wire 70 153 136 123 111 102 94 88 82 77 72 80 175 156 140 127 117 108 100 93 88 82 feede
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OPERATION B-8 B-8 a. Cut the electrode within approximately 3⁄8” of the For CV: Set dial to the calibrated IN/MIN end of the contact tip for solid wire and within desired. (Refer to Setting Constant Wire Feed approximately 3⁄4” of the extension guide for cored Speed Section.) wire. For CC: Set dial to value determined from the b. Position electrode over joint. End of electrode CC Wire Speed Graph for the DESIRED IN/ should be slightly off the work. MIN and ARC VOLTS to be used. (Refer to c. Lowe
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OPERATION B-9 B-9 CAUTION been opened. Arc shorting is more difficult to avoid when using a CC power source, and requires a more refined Do not use LN-25 models below Code 9200 with operator technique than when using a CV power any TIG or Square Wave welding power sources. source. Improved performance can be obtained Do not use LN-25 models equipped with internal on CC power source applications within the contactors with non-Lincoln TIG or Square Wave following guidelines: welding power sources.
