Lincoln Electric IM10031-A manual Wire Feed Speed Validation, Model gearing, BOARD LN-25 PRO

Page 35

D-2

MAINTENANCE

D-2

 

 

 

The LN-25™ PRO flow meter cannot be calibrated. If the flow meter reads incorrectly, check for leaks or kinks in the gas hose. Replace the flow meter if neces- sary.

Wire Feed Speed Validation

(See Figure D.1)

Calibration of the LN-25™ PRO may be required when the p.c. board, wire feed speed potentiometer or motor is replaced or serviced. Calibration matches the scale on the name plate to the actual wire feed speed.

Tools required:

•RPM meter

•Constant voltage DC welding power source (DC-400, V-350, CV-400 or equivalent)

•7/16" open end wrench

To verify if calibration is necessary:

1.

Turn power OFF.

 

2. Set the wire feed speed per the table.

 

 

 

Model gearing

Wire Feed Speed

Acceptable Range

Standard Speed

400 in/min

69 - 77 rpm

Extra Torque

150 in/min

25 - 31 rpm

 

 

 

 

3.

Remove the plastic cover from the lower portion of the

 

wire drive with a 7/16" wrench.

 

4.

Connect the LN-25™ PRO to the constant voltage DC

 

welding power source. The work lead of the LN-25™

 

PRO must be connected to the work terminal of the

 

power source.

 

5.

Turn power ON.

 

6. Measure the motor rpm when the COLD FEED button is pressed.

7. Verify the rpm is within the acceptable range.

FIGURE D.1

MOTOR

SHAFT

To change the wire feed speed calibration: (See Figure D.2)

Tools required:

•5/16" nut driver

•RPM meter

•Shorting plug. The shorting plug shorts pins 4 & 8 of connector J3 on the Control P.C. Board. J3 is a 8 pin molex connector.

1.Turn power OFF.

2.Remove the 4 screws holding the rear cover inside the feeder and remove the cover.

3.Open the idle arm.

4.Set the wire feed speed per the table.

Model gearing

Wire Feed Speed

Standard Speed

400 in/min

Extra Torque

150 in/min

 

 

5.Connect the LN-25™ PRO to the constant voltage DC welding power source. The work lead of the LN-25™ PRO must be connected to the work terminal of the power source.

6.Turn power ON.

7.Insert the shorting plug into connector J3 on the Control P.C. Board. The shorting plug shorts pins 4 & 8.

8.Remove the shorting plug.

9.Turn power OFF.

10.Replace the cover and secure with the screws.

FIGURE D.2

COVER

COVER

P.C. bOARD

LN-25™ PRO

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Contents LN-25 Tmpro California Proposition 65 Warnings SafetyElectric Shock can kill Iii Welding and Cutting Sparks can Cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéElectromagnetic Compatibility EMC Methods of Reducing Emissions Mains Supply On-Line Product Registration ViiPlease Examine Carton and Equipment For Damage Immediately TAbLE of Contents LN-25 PRO InstallationTechnical Specifications LN-25 PRO K2613-1, K2613-2 Wire SIzESWeld CAbLE SIzE Safety PrecautionsLocation High Frequency ProtectionAnalog Control CAbLE K1797-xx 3INSTALLATIONA-3Power Source Wire FeederShielding GAS Connection Function Pin WiringCAbLE Connections Changing the GUN Receiver bUSHING Wire Drive ConfigurationProcedure to Install Drive Rolls and Wire Guides Fe, CrNi Pressure ARM AdjustmentLoading Spools of Wire GUN ConnectionDescription Power Source to LN-25 PROAcross the ARC SET-UPS Figure A.7 Figure A.9 9INSTALLATIONA-9Operation Safety PrecautionsGeneral Description Figure b.1 Case Front Controls See Figure b.1Extra Torque Wire Feed Speed KNObWire Feed Speed, CV Operation Minimum Arc Volts Maximum WFSPolarity LED Figure b.2 Internal ControlsStep Trigger Step Trigger Interlock SwitchInternal Controls Description Cold Feed PUSHbUTTONFigure b-3 Constant Current Wire WeldingRear Controls ItemdescriptionLiter/Min POWER-UP SequenceGAS Purge PUSHbUTTON Flow MeterElectrode SIzE AccessoriesFactory Installed Equipment Drive Roll KitsOn at all times Accessories K1500-5 Gun Receiver Bushing compatible Installation of the K590-6 Water Cooling KIT CALIbRATION Specification MaintenanceRoutine Maintenance Periodic MaintenanceBOARD LN-25 PRO Wire Feed Speed ValidationTo change the wire feed speed calibration See Figure D.2 Model gearingElectric Shock can kill TROUbLESHOOTINGCause Recommended Course of Action PRObLEMSSymptoms POSSIbLETROUbLESHOOTING Enhanced Diagram DiagramsDimension Print Precaucion Warnung
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