Lincoln Electric LN-9 GMA, LN-9F GMA manual Machine Grounding, Direct Work Lead Connection

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A-12

INSTALLATION

MACHINE GROUNDING

LN-9 GMA wire feeders are grounded to the power source through the input cable. The power source grounding cable must be properly connected to electri- cal ground. See your power source operating manual for details.

WORK CAbLE CONNECTION

Connect a work lead of sufficient size and length between the proper output terminal on the power source and the work. See Table A-1. Be sure the con- nection to the work makes tight metal-to-metal electri- cal contact. Poor work lead connections can activate the grounding lead protector and/or result in poor weld- ing performance.

TAbLE A.1 – WORK CAbLE SIzES

Current

Copper Work Cable Size, AWG

 

 

60% Duty Cycle

Up to 50' length

50'-100' Iength

 

 

 

300 Amps

0

00

 

 

 

400 Amps

00

000

 

 

 

500 Amps

00

000

 

 

 

600 Amps

000

0000

DIRECT WORK LEAD CONNECTION

Lincoln specified procedures give voltage readings taken between the work and the gun cable brass con- nection block of the LN-9 GMA. To match these voltage readings, the connection diagrams show the #21 lead being extended and connected directly to the work instead of #21 on the power source terminal strip (or Dual Process Kit terminal strip). This extended lead must be connected directly to the work. When using a Dual Process Kit, you must extend the lead individual- ly for each LN-9 GMA.

As an alternative, LN-9 GMA models are provided with a quick-connect terminal splice connection in the #21 lead between the input Amphenol connector of the LN9 GMA and its polarity switch. See the LN-9 GMA wiring diagram. This in-line connection consists of a red insu- lated male and female .250 x .032 terminal pair locat- ed in the lead harness. It runs along the right side of the wire feed motor inside the control section of the LN- 9 GMA models and in the lead harness at the lower left corner of the control box (near the input Amphenol) of the LN-9F models. You may also open this #21 lead and connect your own direct work lead equipped with a

.250 x .032 female quick-connect terminal to the male side of the splice. This direct work lead connection must be tape insulated, strain-relieved, and routed out- side the LN-9 GMA control box to be connected direct- ly to the work.

With either direct work lead connection method, the LN-9 GMA regulates the power source to hold the arc voltage constant, even with voltage drops in the elec- trode lead, work lead, or work lead connection. If the direct work lead becomes disconnected from the work, the LN-9 GMA wire feeder will stop welding shortly after the arc is struck. See the topic "Circuit Protection and Automatic Shutdown" in the Operation section of this manual.

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 Section E ViiiSection F P127, P125, P107 & P289 SeriesTechnical Specifications LN-9 GMA and LN-9F GMA Wire FeederWidth Height Attaching the Wire Reel Stand Installing the LN-9 GMA Roll and 4-ROLL ModelsMounting the Wire Feed Unit Mounting the UnitPower Input CAbLE ASSEMbLY Electrical Connections LN-9 GMA and LN-9F GMARouting 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 PrecautionsRecommended Processes and Equipment General DescriptionK424 LN-9 GMA 2-ROLL and K568-1 LN-9 GMA 4-ROLL K436 LN-9F GMA 2-ROLL and K583-1 LN-9F GMA 4-ROLLDC Constant Voltage Power Sources Controls and Settings Operation Operation Circuit Protection and Automatic Shutdown Power Supply FuseAvoiding Grounding Lead Protector GLP Shutdown Circuit bREAKERAutomatic 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 LbIdle Roll Pressure Setting Roll Wire FeedersFor TWO-ROLL Feeders Pressure Adjustment Knob Adjust the LN-9 GMA Controls Adjust the Power SourcePulse Power 500, DC650 PRO CV-400, CV-500-I DC-250, DC-400, or DC-600RUN-IN Feature Starting CharacteristicsVoltage Control Response Select AccelerationProcedure AT END of Coil Security of Weld Procedure SettingsMaking a Weld Power Input CAbLE ASSEMbLIES K196, K595, K596 Optional Equipment and AccessoriesWire Reel Stands and Mountings Auxiliary Equipment ContactsWire Reel Door KIT Attaching the Wire Reel StandsSpindle for READI-REELS and 2 I.D. Spools K162-H READI-REEL AdaptersUniversal Wire Reel Stand K1524-1 BURNbACK Timer KIT K419 Wire Feeder AccessoriesDual Process KIT K317 For Wire Feeders GMA Timer KIT K418Dual Procedure KIT K319 Pulse Power Filter Conversion KIT K442-1Undercarriage K163 Swivel Platform K178-1Continuous Flux Feed Tank K320 K320 Flux Tank LoadingK58 Magnetic Separator Kit Roll Solid Steel Electrode TAbLE C.2 Drive Roll and Guide TUbE KitsCored Electrode Aluminum ElectrodePeriodic Maintenance Routine MaintenanceCoils with 1 Spindle AdapterFigure 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