Lincoln Electric IM892-C manual Upslope, Burnback, Postflow

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B-44	OPERATION	B-44

EXAMPLE 2 - 2 STEP TRIGGER: Improved Arc Start and Arc End. Tailoring the arc start and arc end is a common method for reducing spatter and improving weld quality. This can be accomplished with the Start and Burnback functions set to a desired values and Crater set to OFF. (See Figure B.20)

For this sequence,

PREFLOW:

Shielding gas begins to flow immediately when the gun trigger is pulled.

RUN-IN:

After preflow time expires, the power source regulates to the start output and wire is advanced towards the work piece at the Run-In WFS. If an arc is not estab- lished within 1.5 seconds, the power source output and wire feed speed skips to the weld settings.

UPSLOPE:

Once the wire touches the work and an arc is estab- lished, both the machine output and the wire feed speed ramp to the weld settings throughout the start time. The time period of ramping from the start set- tings to the weld settings is called UPSLOPE.

WELD:

After upslope, the power source output and the wire feed speed continue at the weld settings.

BURNBACK:

As soon as the trigger is released, the wire feed speed is turned OFF and the machine output contin- ues for the burnback time.

POSTFLOW:

Next, the machine output is turned OFF and shielding gas continues until the post flow timer expires.

	Trigger Pulled
Idle	Preflow

Shielding On
Gas	Off

FIGURE B.20

		2 Step Trigger
		Start = ON
		Crater = OFF
	ArcEstablished	Burnback = ON
	ArcEstablished
Strike Upslope			Weld

Trigger Released

Burnback Postflow Idle

Power

Weld

Start tim e

1.5 sec max.

Source

Start

Burnback Time

Output

Off

Weld

WFS

Run-in

Off

POWER FEED™ 25M

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Contents Power Feed 25M Safety Electric Shock can kill Welding and Cutting Sparks can Cause fire or explosion IiiPrécautions DE Sûreté Please Examine Carton and Equipment For Damage Immediately On-Line Product RegistrationTable of Contents Gearing WFS Range Wire Sizes Height Width Depth WeightPower Feed 25M Input Voltage ± 10% Input AmperesSafety Precautions LocationHigh Frequency Protection Electric Shock can KillArclink Control Cables Cable ConnectionsPIN To install Weld Cable SizeCoaxial Weld Cable Table A.1Electrode Polarity Shielding GAS ConnectionBuild UP of Shielding GAS MAY Harm Health or Kill Changing the Drive Motor Gear Ratio OFFWire Drive Configuration Procedure to Install Drive Rolls and Wire GuidesRemote Sense Lead Specifications Loading Spools of WireTypical System Configurations Direct Current Open CircuitVoltage Input VoltageDefinition of Welding Terms Duty CycleRecommended Power Sources Recommended ProcessesEquipment Limitations Case Front Controls Code See Figure B.1Case Front Controls Code 11456 ON-OFF Switch Status LEDTable B.1 DefinitionMaking a Weld with Waveform Technology Power Sources Smaw Stick WeldingProcess Mode Smaw Stick Welding DisplayMSP4 Operation NON-SYNERGIC Gmaw and Fcaw Welding Three non-synergic welding modes are availableMSP4 Operation Non-Synergic Gmaw and Fcaw Welding DisplayGmaw MIG Synergic Welding Figure B.5Gmaw MIG Synergic Welding Display Synergic CV Voltage DisplaySteel and Stainless Synergic GMAW-P Pulsed MIG Welding ARC ControlSteel and Stainless Synergic GMAW-P Pulsed MIG Welding 220 Pulse-on-Pulse Welding Figure B.9Aluminum GMAW-P and GMAW-PP Aluminum Pulse WeldingAluminum GMAW-P and GMAW-PP Welding Figure B.14Aluminum Pulse and Pulse-On-Pulse Synergic Weld Display Weld ModesGMAW-STT Welding Figure B.15GMAW-STT Weld ModesPeak Current Figure B.16 Background Current Figure B.17Tailout Gtaw TIG Welding Gtaw Tigwelding Figure B.17a Figure B.17aSET-UP Features Menu Figure B.17b Setup MenuUser Defined Parameters Parameter Definition Procedure Change Method Stall Factor AdjustmentParameter Definition Gun Offset Adjustment Crater DelayReset Consumable Weight TIG Gas Control100 View Diagnostics Parameter Definition Push-Pull Gun Knob BehaviorSense From Studs Show Test Modes107 View Power Source Protocol Parameter Definition 103 View Software Version Information104 View Hardware Version Information 105 View Welding Software InformationParameter Definition 503 Memory Button Disable 504 Mode Select Panel Lock505 Setup Menu Lock 506 Set User Interface PasscodeParameter Definition 507 UI Clear All Memories 509 UI Master LockoutPROCEDURE/MEMORY Panel OPERA- Tion User MemoriesLimits Parameter Range UnitsLimits may be set for MSP4 DisplayHigh Limit Low LimitParameter Name Dual PROCEDURE/MEMORY Operation For Code 11456 and HigherMemory Set Limits 200 Memory ValueInternal Controls for Code DescriptionInternal Controls for Code 11456 and higher EscriptionCold FEED/GAS Purge Switch Light SwitchPressure ARM Adjustment Heater SwitchStep Trigger Operation STEP- Trigger OperationStep Trigger Code 11456 and higherPreflow RUN-INWeld Upslope BurnbackPostflow Start & Upslope CraterCrater & Downslope Figure B.22 Start DownslopeDescription Rear ControlsOperation on Lincnet Power Sources Flow MeterScfh Liter/MinFactory Installed Equipment Wire Type Electrode Size KP KITDrive Roll Kits Used K2593-xx #1 Co-Axial Power Cable K2683-xx Heavy Duty ArcLink Control Cable K1500-5 Gun Receiver Bushing compatible Installation of the K590-6 Water Cooling KIT Water Cooled Guns Routine Maintenance Periodic MaintenanceCalibration Specification Troubleshooting Symptoms Description Possible AdjustmentsOutput Problems Troubleshooting Wiring Diagram Power Feed 25M G5585Diagrams Dimensions for Code Dimensions for Codes 11456 Precaucion Warnung