Lincoln Electric LN-9 GMA manual Procedure AT END of Coil, Security of Weld Procedure Settings

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OPERATION

MAKING A WELD

1.Inch the electrode through the gun and cable and then cut the electrode within approximately 3/8" of the end of the contact tip for solid wire and within approximately 3/4" of the extension guide for cored wire.

2.Connect the work cable to the metal to be welded. The work cable must make good electrical contact to the work. The work must also be grounded as stated in the Safety section at the beginning of this manual.

3.Be sure the welding power source and the shield- ing gas supply are turned on.

4.Position the electrode over the joint. The end of the electrode should be slightly over the joint.

5.Lower the welding helmet, close the gun trigger and begin welding. Hold the gun so that the con- tact tip to weld distance gives the correct electrical stickout as required for the procedure being used.

6.To stop welding, release the gun trigger and then pull the gun away from the work after the arc goes out.

PROCEDURE AT END OF COIL

When the wire on the reel is used up, follow this pro- cedure for removing the old wire from the conductor cable and loading a new reel.

1.Cut the end of the electrode off at the gun end. Do not break it off by hand since this puts a slight bend in the wire and makes it difficult or impossible to pull it back through the nozzle.

2.Uncouple the gun conductor cable from the wire drive unit.

3.Lay the cable out straight.

4.Using pliers to grip the wire, pull it out of the cable from the connector end. Do not pull it from the gun end.

5.Put the conductor cable back on the wire drive unit after the electrode has been removed.

6.Load a new reel of wire and feed it through the cable as described earlier in this section.

SECURITY OF WELD PROCEDURE SETTINGS

There are two ways to prevent or limit unauthorized readjustment of the LN-9 GMA voltage and wire feed speed controls.

1.Once the procedure is set, the security panel of the LN-9 GMA can be locked to prevent access to the control knobs.

2.The control range of the procedure control knobs can be limited to either about 3% or about 15% of the full range control by installing a knob rotation stop screw to either or both of the control knobs. This stop screw is installed in the following man- ner:

a)Turn off the input power to the LN-9 GMA unit.

b)Loosen the knob set screw and remove the control knob and the felt seal located behind the knob.

c)Remove the control potentiometer locknut and fiber spacer, then open the control panel and remove the potentiometer from the panel.

d)Install a 1/2" long, pan or round head, #4 sheet metal screw into the 0.10" dia. hole located

.40" from the center of the potentiometer hole so that the head is on the back side of the panel (inside the control box).

e)Remount the control potentiometer with the fiber spacer under the locknut, then close and secure the control panel.

f)Replace the felt seal around the fiber spacer so that the #4 screw protrudes between the fiber spacer and the felt seal.

g)Turn on the input power to the LN-9 GMA unit and set the desired procedure by rotating the potentiometer shaft.

h)Carefully replace the control knob so that the #4 screw inserts into the center of the shorter length channel on the back of the knob for about 3% of the total range of control, or the center of the longer length channel for about 15% of the total range of control.

i)With finger pressure on the knob against the felt seal, carefully retighten the knob set screw.

NOTE: Steps g) through i) will have to be repeated if you want to change the set procedure to a value outside the selected 3% or 15% control range limit.

LN-9 GMA and LN-9F GMA Wire Feeder

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Contents Safety Depends on You LN-9 GMA and LN-9F GMA Wire FeederSafety Electric Shock can kill Iii Welding and Cutting Sparks can Cause fire or explosionPrécautions DE Sûreté Thank You TAbLE of Contents TAbLE OF CONTENTS cont’d P127, P125, P107 & P289 Series ViiiSection E Section FLN-9 GMA and LN-9F GMA Wire Feeder Technical SpecificationsWidth Height Mounting the Unit Installing the LN-9 GMA Roll and 4-ROLL ModelsAttaching the Wire Reel Stand Mounting the Wire Feed UnitElectrical Connections LN-9 GMA and LN-9F GMA Power Input CAbLE ASSEMbLYRouting the Electrode Figure A.3 LN-9F GMA Control bOX Figure A.2 Strain Relief ClampInstallation Can kill Figure A.5 Connection of LN-9 GMA to DC-600 Power Sources Figure A.6 Connection of LN-9 GMA to DC-1000 Power Sources 75 76 77 Installation Figure A.9 Connection of LN-9 GMA to V300 Power Sources Direct Work Lead Connection Machine GroundingFor GMA GUN CAbLES Connecting the GUN CAbLE to the Wire FeederCylinder may explode if damaged Hooking UP GMA Shielding GASOperating Instructions Safety PrecautionsK436 LN-9F GMA 2-ROLL and K583-1 LN-9F GMA 4-ROLL General DescriptionRecommended Processes and Equipment K424 LN-9 GMA 2-ROLL and K568-1 LN-9 GMA 4-ROLLDC Constant Voltage Power Sources Controls and Settings Operation Operation Circuit bREAKER Power Supply FuseCircuit Protection and Automatic Shutdown Avoiding Grounding Lead Protector GLP ShutdownAutomatic Shutdown Changing Drive Rolls for 2-ROLL Wire Feeders Drive Roll InstallationGuide Tube Detail Changing Drive Rolls for 4-ROLL Wire Feeders Large Figure b.7a Threaded Locking Collar Wire LoadingFeeding Electrode and bRAKE Adjustment Loading a 50-60 Lb .7-27.2 KG. Coil Using K1504-1 Coil ReelLoading a 50 or 60 Lb. Coil ADJUSTAbLE Wire Reel bRAKEInnershield Coils K378 Reel Mounting Stand Loading and Feeding 13-14 LbRoll Wire Feeders Idle Roll Pressure SettingFor TWO-ROLL Feeders Pressure Adjustment Knob DC-250, DC-400, or DC-600 Adjust the Power SourceAdjust the LN-9 GMA Controls Pulse Power 500, DC650 PRO CV-400, CV-500-ISelect Acceleration Starting CharacteristicsRUN-IN Feature Voltage Control ResponseSecurity of Weld Procedure Settings Procedure AT END of CoilMaking a Weld Auxiliary Equipment Contacts Optional Equipment and AccessoriesPower Input CAbLE ASSEMbLIES K196, K595, K596 Wire Reel Stands and MountingsREADI-REEL Adapters Attaching the Wire Reel StandsWire Reel Door KIT Spindle for READI-REELS and 2 I.D. Spools K162-HUniversal Wire Reel Stand K1524-1 BURNbACK Timer KIT K419 Wire Feeder AccessoriesPulse Power Filter Conversion KIT K442-1 GMA Timer KIT K418Dual Process KIT K317 For Wire Feeders Dual Procedure KIT K319K320 Flux Tank Loading Swivel Platform K178-1Undercarriage K163 Continuous Flux Feed Tank K320K58 Magnetic Separator Aluminum Electrode TAbLE C.2 Drive Roll and Guide TUbE KitsKit Roll Solid Steel Electrode Cored ElectrodeAdapter Routine MaintenancePeriodic Maintenance Coils with 1 SpindleFigure D.1 Speed Sensor Module Location Proper Speed Sensor Module MountingFigure D.2 Switch Requirements Figure D.2 LN-9 GMA ConnectorsTROUbLESHOOTING Wire Feeding PRObLEMS TROUbLESHOOTING GuideGun trigger will not feed wire. Digital meter is not lit Grounding Lead Protector Shutdown in the Operation section TROUbLESHOOTING Welding PRObLEMS Starting Characteristics Wire LN-9 GMA WIRINGLN-9F GMA LN-9 GMA Dimension Print LN-9F GMA Dimension Print 1 Wire Drive Unit Control bOX LN-9F Dimension Print 2Page Precaucion Keep your head out of fumes LN-9 GMA Wire Feeder
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