Lincoln Electric LN-9F GMA, LN-9 GMA manual Idle Roll Pressure Setting, Roll Wire Feeders

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b-17

b-17

OPERATION

IDLE ROLL PRESSURE SETTING

The idle roll pressure is set at the factory backed out two turns from full pressure for 2-roll feeders, three turns from full pressure for 4-roll feeders. This is an approximate setting. For small wire sizes and alu- minum wire, the optimum idle roll pressure varies with type of wire, surface condition, lubrication and hard- ness. The optimum idle roll setting can be determined as follows:

2-ROLL WIRE FEEDERS

1.Press the end of the gun against a solid object that is electrically isolated from the welder output and press the gun trigger for several seconds.

2.If the wire "birdnests," jams or breaks at the drive roll, the idle roll pressure is too great. Back the pressure setting out 1/2 turn, run new wire through the gun, and repeat step 1. See Figure B.9.

3.If the only result is drive roll slippage, loosen the gun cable clamping screw in the gearbox conduc- tor 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 setting 1/4 turn, lock the gun cable in place and repeat steps 1 and 2.

FIGURE b.9 – IDLE ROLL PRESSURE SETTING

FOR TWO-ROLL FEEDERS

PRESSURE

ADJUSTMENT

KNOB

4-ROLL WIRE FEEDERS

1.Release the incoming idle roll and perform the pressure setting procedure for two-roll wire feeders to set outgoing idle roll pressure.

2.After the outgoing pressure is set, determine how many turns away from full pressure the setting is.

3.Set both idle roll tensions to this setting. Engage both idle rolls before welding. For most applica- tions, best wire feeding will occur when both idle roll pressures are set the same.

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

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Contents LN-9 GMA and LN-9F GMA Wire Feeder Safety Depends on YouSafety Electric Shock can kill Welding and Cutting Sparks can Cause fire or explosion IiiPrécautions DE Sûreté Thank You TAbLE of Contents TAbLE OF CONTENTS cont’d Viii Section ESection F P127, P125, P107 & P289 SeriesLN-9 GMA and LN-9F GMA Wire Feeder Technical SpecificationsWidth Height Installing the LN-9 GMA Roll and 4-ROLL Models Attaching the Wire Reel StandMounting the Wire Feed Unit Mounting the UnitElectrical Connections LN-9 GMA and LN-9F GMA Power Input CAbLE ASSEMbLYRouting the Electrode Figure A.2 Strain Relief Clamp Figure A.3 LN-9F GMA Control bOXInstallation 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 Machine Grounding Direct Work Lead ConnectionConnecting the GUN CAbLE to the Wire Feeder For GMA GUN CAbLESHooking UP GMA Shielding GAS Cylinder may explode if damagedSafety Precautions Operating InstructionsGeneral Description Recommended Processes and EquipmentK424 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 Power Supply Fuse Circuit Protection and Automatic ShutdownAvoiding Grounding Lead Protector GLP Shutdown Circuit bREAKERAutomatic Shutdown Drive Roll Installation Changing Drive Rolls for 2-ROLL Wire FeedersGuide Tube Detail Changing Drive Rolls for 4-ROLL Wire Feeders Large Wire Loading Figure b.7a Threaded Locking Collar Loading a 50-60 Lb .7-27.2 KG. Coil Using K1504-1 Coil Reel Feeding Electrode and bRAKE AdjustmentADJUSTAbLE Wire Reel bRAKE Loading a 50 or 60 Lb. CoilLoading and Feeding 13-14 Lb Innershield Coils K378 Reel Mounting StandRoll Wire Feeders Idle Roll Pressure SettingFor TWO-ROLL Feeders Pressure Adjustment Knob Adjust the Power Source Adjust the LN-9 GMA ControlsPulse Power 500, DC650 PRO CV-400, CV-500-I DC-250, DC-400, or DC-600Starting Characteristics RUN-IN FeatureVoltage Control Response Select AccelerationSecurity of Weld Procedure Settings Procedure AT END of CoilMaking a Weld Optional Equipment and Accessories Power Input CAbLE ASSEMbLIES K196, K595, K596Wire Reel Stands and Mountings Auxiliary Equipment ContactsAttaching the Wire Reel Stands Wire Reel Door KITSpindle for READI-REELS and 2 I.D. Spools K162-H READI-REEL AdaptersUniversal Wire Reel Stand K1524-1 Wire Feeder Accessories BURNbACK Timer KIT K419GMA Timer KIT K418 Dual Process KIT K317 For Wire FeedersDual Procedure KIT K319 Pulse Power Filter Conversion KIT K442-1Swivel Platform K178-1 Undercarriage K163Continuous Flux Feed Tank K320 K320 Flux Tank LoadingK58 Magnetic Separator TAbLE C.2 Drive Roll and Guide TUbE Kits Kit Roll Solid Steel ElectrodeCored Electrode Aluminum ElectrodeRoutine Maintenance Periodic MaintenanceCoils with 1 Spindle AdapterProper Speed Sensor Module Mounting Figure D.1 Speed Sensor Module LocationFigure D.2 LN-9 GMA Connectors Figure D.2 Switch RequirementsTROUbLESHOOTING TROUbLESHOOTING Guide Wire Feeding PRObLEMSGun trigger will not feed wire. Digital meter is not lit Grounding Lead Protector Shutdown in the Operation section TROUbLESHOOTING Welding PRObLEMS Starting Characteristics LN-9 GMA WIRING WireLN-9F GMA LN-9 GMA Dimension Print LN-9F GMA Dimension Print 1 Wire Drive Unit LN-9F Dimension Print 2 Control bOXPage Precaucion LN-9 GMA Wire Feeder Keep your head out of fumes