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SVM171-A
January, 2007
LF-72/74
For use with machines having Code Number : 11075 thru 11293
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 operation on
your part. DO NOT INSTALL,
OPERATE OR REPAIR THIS
EQUIPMENT WITHOUT READ-
ING THIS MANUAL AND THE
SAFETY PRECAUTIONS CON-
TAINED THROUGHOUT. And,
most importantly, think before
you act and be car
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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 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 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-free open arc welding. Headshield and filter lens gloves to insulate hands. should conform to ANSI Z87. I standards. 3.b. In
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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 zones où l’on pique le laitier. PRÉCAUTIONS DE SÛRETÉ 6. Eloigner les matériaux inflammables ou les recouvrir afin de Pour votre propre protection lire et observer toutes les instructions prévenir tout risque d’incendie dû aux étincelles. et les précautions de sûreté specifiques qui parraissent dans ce manuel aussi bien que les précautions de sûreté générales suiv- 7. Quand on ne soude pas, poser la pince à une endroit isolé de antes: la masse. Un court-circuit accidental peut provo
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v v MASTER TABLE OF CONTENTS FOR ALL SECTIONS Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i-iv Installation LF-72 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section A Installation LF-74 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Section AA Operation LF-72 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Section A-1 Section A-1 TABLE OF CONTENTS - INSTALLATION SECTION - Installation ..............................................................................................................Section A Technical Specifications...............................................................................................A-2 Safety Precautions .......................................................................................................A-3 Location ..........................................
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A-2 A-2 INSTALLATION : LF-72 Wire Feeder TECHNICAL SPECIFICATIONS SPEC.# TYPE WIRE FEED SPEED RANGE Wire Size LF-72 Speed Solid Cored K2327-1 Base Model K2327-4 K2327-2 Bench Model 50-800 IPM .023 - 1/16 in. .035 - 5/64 in Standard Duty (1.27-20.3 m/m) (0.6 - 1.6 mm) (0.9 - 2.0 mm) K2327-3 Bench Mode Heavy Duty CONTROL BOX, WIRE DRIVE AND COMPLETE UNITS SPEC.# TYPE INPUT POWER PHYSICAL SIZE• TEMPERATURE RATING Input Voltage Dimensions and Current Height Width Depth Weight Op
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A-3 A-3 INSTALLATION MOUNTING SAFETY PRECAUTION ELECTRIC SHOCK can kill. For location and size, LF-72 Bench Model Rear • Only qualified personnel should Mounting Holes (See Figure A.1) and for Bottom perform this installation. Mounting Holes (See Figure A.2). • Turn off the input power to the power source at the disconnect switch or fuse box before working on this equipment. Turn off the input power to any other equipment FIGURE A.1 connected to the welding system at the disconnect switch or fu
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A-4 A-4 INSTALLATION BENCH MOUNT BOOM MOUNT When boom mounting, remove the wire reel stand (if The LF-72 mounts in a variety of configurations. As assembled) and secure the wire feeder directly to the shipped from the factory, the LF-72 is suitable for desired surface. bench mounting or placing directly on top of the weld- ing power source (CV-xxx and DC-xxx product family only). Bench Mount SUSPENDED SWIVEL MOUNT Only suspend the wire feeder by the lift bail of the portability kit. Both the s
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A-5 A-5 INSTALLATION SAFETY PRECAUTION ELECTRIC SHOCK can kill. • Only qualified personnel should perform this installation. • Turn off the input power to the power source at the disconnect switch or fuse box before working on this equipment. Turn off the input power to any other equipment connected to the welding system at the disconnect switch or fuse box before working on this equipment. • Do not touch electrically hot parts. ------------------------------------------------------------------
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A-6 A-6 INSTALLATION COAXIAL WELD CABLES A coaxial weld cable is constructed by 8 small leads wrapped around one large lead. The large inner lead Coaxial welding cables are specially designed welding connects to the electrode stud on the power source cables for pulse welding or STT welding. Coaxial weld and the electrode connection on the wire feeder. The cables feature low inductance, allowing fast changes in small leads combine together to form the work lead, the weld current. Regular cables h
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A-7 A-7 INSTALLATION ANALOG CONTROL CABLE CONTROL CABLE CONNECTIONS • All control cables can be connected end to end to extend their length. The control cable connecting the wire feeder to the power source is specially made for the welding envi- ronment. The wire feeder power requires overcurrent protection. Connect the wire feeder only to power sources with overcurrent protection of no more than 15 amps. POWER SOURCE WIRE FEEDER A J J A K K I B B I H N N L C C L H G M M G D D F E E F PIN FUN
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A-8 A-8 NOTES ANALOG MILLER CONTROL CABLE ADAPTER K2335-1 This Lincoln Electric wire feeder may be mounted to a limit- ed number of Miller Electric power sources. The Miller power source must have the amphenol pin definition shown in the table below for proper operation of the wire feeder. Operation of Lincoln wire feeders on Miller power sources may result in lack of high speeds or reduce pull force on high wire feed speeds. Maximum wire feed speed for the LF-72 operating on a Miller power sou
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A-9 A-9 INSTALLATION WELDING GUN/WIRE FEEDER TRIGGER REMOTE SENSE LEAD SPECIFICATIONS CONNECTOR Refer to the power source instruction manual for Wire Feeder Amphenol instructions for connecting the wire feeder for STT welding. E Welding Gun A D WIRE DRIVE SYSTEMS B C Trigger Lead Drive Roll Kits are designed to feed specific types and wire sizes. The LF-72 Bench Model comes with the combo KP1696-1. All other Drive Roll Kits listed are not included, but are available for ordering from the fol- Wi
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A-10 A-10 INSTALLATION WELDING GUNS, TORCHES AND ACCES- 3. Fully insert the gun cable connector end into the gun receiver bushing and gently tighten the thumb SORIES screw as show in Figure A.3 below. GUN RECEIVER BUSHING 4. Connect the gun trigger connector to the trigger The LF-72 wire feeder comes with a K1500-2 gun receptacle. Make sure that the key ways are receiver bushing. aligned and insert. MAGNUM GUN AND CABLE ASSEMBLIES The LF-72 wire feeder model will accept a number of optional gu
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A-11 A-11 INSTALLATION PROCEDURE FOR CHANGING WIRE DRIVE CONFIGURATION (See Figure A.5) DRIVE AND IDLE ROLL SETS Changing the Gun Receiver Bushing (See Figure A.4 ) WARNING WARNING ELECTRIC SHOCK can kill. ELECTRIC SHOCK can kill. • Turn the input power OFF at the dis- connect switch or fuse box before •Turn the input power OFF at the attempting to connect or disconnect welding power source before instal- input power lines, output cables or lation or changing drive rolls and/or control cables.
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A-12 A-12 INSTALLATION 7. Disconnect the shielding gas hose from the gun PRESSURE ARM ADJUSTMENT bushing, if required. WARNING 8. Connect the shielding gas hose to the new gun bushing, if required. ELECTRIC SHOCK can kill. 9. Rotate the gun bushing until the thumb screw hole •Turn the input power OFF at the aligns with the thumb screw hole in the feed plate. welding power source before instal- Slide the gun receiver bushing into the wire drive lation or changing drive rolls and/or and verify th
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A-13 A-13 INSTALLATION WIRE REEL LOADING 3. Re-install the retaining collar. Make sure that the release bar snaps out and that the retaining collar fully engages the groove on the spindle. WARNING FIGURE A.8 • Keep hands, hair, clothing and tools away from rotating equipment. Retaining •Do not wear gloves when threading wire or Collar changing wire spool. • Only qualified personnel should install, use or service this equipment. --------------------------------------------------------------------
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A-14 A-14 INSTALLATION FIGURE A.9 WELD WIRE ROUTING The electrode supply may be either from reels, Readi- Reels, spools, or bulk packaged drums or reels. Observe the following precautions: a) The electrode must be routed to the wire drive unit so that the bends in the wire are at a minimum, and also that the force required to pull the wire from the reel into the wire drive unit is kept at a minimum. b) The electrode is “hot” when the gun trigger is pressed and must be insulated from the boom a
