Lincoln LN-742H manual Innershield Coils, Electrode Feeding and Brake Adjustment

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B-9

OPERATION

B-9

 

 

 

TO MOUNT 10 TO 44 lb (4.5 to 20 kg) SPOOLS (12 in./300 mm DIAMETER) OR 13-14 lb (6 kg)

INNERSHIELD COILS:

The spindle should be located in the lower mounting hole of the K1524-1 Universal Stand if used.

[For 8 in. (200 mm) spools, a K468 spindle adapter must first be slipped onto the spindle.]

[For 13 to 14 lb (6 kg) Innershield coils, a K435 Coil Adapter must be used.]

1.Depress the Release Bar on the Retaining Collar and remove it from the spindle. NOTE: Earlier spindles used a threaded collar. See Figure B.5a or B.5b.

2.Place the spool on the spindle, making certain the spindle brake pin enters one of the holes in the backside of the spool. Be certain the wire comes off the reel in a direction so as to de-reel from the bottom of the coil.

3.Re-install the Retaining Collar. Make sure that the Release Bar “pops up” and that the collar retainers fully engage the retaining groove on the spindle.

ELECTRODE FEEDING AND BRAKE ADJUSTMENT

1.Turn the Readi-Reel or spool until the free end of the electrode is accessible.

2.While tightly holding the electrode, cut off the bent end and straighten the first six inches. Cut off the first inch. (If the electrode is not properly straightened, it may not feed or may not go into the outgoing guide tube, causing a “birdnest”.)

3.Insert the free end through the incoming guide tube.

4.Press the cold inch key or gun trigger and push the electrode into the drive roll.

WARNING

ELECTRIC SHOCK can kill.

•Do not touch electrically live parts such as output terminals or internal wiring.

•When inching with the gun trigger, electrode and drive mechanism are “hot” to work and ground and could remain “hot” for several seconds after the gun trigger is released.

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5.Inch the electrode through the gun.

6.Adjust the brake tension with the thumbscrew on the spindle hub until the reel turns freely but with little or no overrun when wire feeding is stopped. Do not overtighten.

LN-742 & LN-742H

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Contents LN-742 & LN-742H Wire Feeders California Proposition 65 Warnings SafetyElectric Shock can kill Cylinder may explode if damaged Sûreté Pour Soudage a L’Arc Précautions DE SûretéThank You Table of Contents Technical Specifications LN-742 InstallationInput Cable Connections Mounting LocationFigure A.2 Strain Relief Clamp PIN GUN Cable Connections Table A.1 Work Lead SpecificationsWork Cable GUN and Cable AssembliesFigure A.5 Water Connections Water Connections For Water Cooled GunsFigure A.6 Shielding GAS Hookup Gmaw Shielding GAS HookupGeneral Description Safety PrecautionsOperation Operating InstructionsFigure B.1 Wire Feeder Controls Controls and SettingsEnglish or Metric Speed Display Units Acceleration SettingDrive Roll Installation Changing Drive Rolls for TWO- Roll Wire FeedersGuide Tube Detail Changing Drive Rolls for FOUR- Roll Wire Feeders Figure B.3 Installing Drive Rolls on a FOUR-ROLL Feeder Figure B.4 Idle Roll Pressure Setting Idle Roll Pressure SettingFigure B.5a Threaded Locking Collar Wire LoadingInnershield Coils Electrode Feeding and Brake AdjustmentTo Mount a 50 or 60 LB Coil Adjustable Wire Reel BrakeFigure B.7 K1504-1 Coil Reel READI-REELS a K438 READI-REEL Adapter Must be UsedMaking a Weld Wire Reel ChangingGeneral AccessoriesTable C.1 LN-742 Accessories Solenoid KIT K589-1 Remote Control KITK163 Undercarriage K178-1 Mounting PlatformWelding Guns Power Input CablesSPINDLES, STANDS, Adapters Attaching the Wire Reel Stand Table C.2 Drive Roll KIT Numbers Drive Roll KitsPeriodic Maintenance MaintenanceRoutine Maintenance HOW to USE Troubleshooting Guide TroubleshootingTroubleshooting Troubleshooting Troubleshooting Troubleshooting Troubleshooting Troubleshooting Diagrams LN-742 & LN-742H LN-742 & LN-742H LN-742 & LN-742H LN-742 & LN-742H Precaucion Warnung

LN-742, LN-742H specifications

The Lincoln LN-742H and LN-742 are renowned models in the realm of industrial welding equipment, specifically designed to cater to the needs of professional welders and fabricators. These machines stand out for their robustness, advanced technology, and ease of use, making them popular choices in various industries, including construction, automotive, and manufacturing.

One of the main features of the Lincoln LN-742H and LN-742 is their powerful Arc control capabilities. The machines are equipped with innovative technology that allows for consistent arc stability, which is crucial for achieving high-quality welds. The adjustable arc force enables users to tailor the welding parameters to their specific applications, facilitating optimal penetration and minimal spatter.

The LN-742H model is particularly notable for its enhanced portable design, making it easier for operators to transport the machine to different job sites. This portability does not compromise its power, as it offers a high output suitable for both thin and thicker materials. Moreover, the LN-742 model comes with a highly efficient cooling system that ensures the machine runs smoothly without overheating, even during prolonged use.

Both models feature an intuitive user interface that simplifies the welding process. The digital display offers real-time feedback on the welding parameters, allowing welders to make precise adjustments as needed. This feature is especially beneficial for beginners, who may be unfamiliar with optimal welding settings.

Another impressive characteristic of the Lincoln LN-742H and LN-742 machines is their versatility. They support various welding processes, including MIG, TIG, and stick welding, giving users the flexibility to choose the most suitable method for their projects. This adaptability makes these models an ideal solution for shops that handle a wide range of welding tasks.

Durability is a significant consideration in the design of the LN-742H and LN-742, as they are built with high-quality materials that withstand heavy use and challenging conditions. The rugged construction extends the lifespan of the machines, reducing the need for frequent repairs and servicing.

In summary, the Lincoln LN-742H and LN-742 welding machines exemplify advanced engineering and user-focused design. Their combination of powerful performance, portability, user-friendly features, and versatile applications makes them essential tools for professionals in the welding industry, paving the way for excellence in metal fabrication and repair.
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