Miller Electric Miller Load Bank Manual: Understanding Lift-Arc Start Procedures

Page 35

6-4. Lift-Arc™Start Procedure

Lift-Arc Start Method

1 2

	“Touch”	1 − 2
	“Touch”	Seconds
		Seconds

Do NOT Strike Like A Match!

Notes

Lift-Arc t TIG

With Lift-ArctTIG selected, start arc as follows:

1TIG Electrode

2Workpiece

Turn gas on. Touch tungsten electrode to workpiece at weld start point. Hold electrode to workpiece for 1-2 seconds, and slowly lift electrode. Arc is formed when electrode is lifted.

Normal open-circuit voltage is not present before tungsten electrode touches workpiece; only a low sensing voltage is present between electrode and workpiece. The solid-state output contactor does not energize until after electrode is touching workpiece. This allows electrode to touch workpiece without overheating, sticking, or be- ing contaminated.

Application:

Lift-Arc is used for the DCEN GTAW process when HF Start method is not permitted, or to replace the scratch method.

Work like a Pro!

Pros weld and cut safely. Read the safety rules at the beginning of this manual.

OM-4433 Page 31

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Contents File Engine Drive OM-4433218 314PProcesses DescriptionFrom Miller to You Table of Contents Warranty HOT Parts can cause severe burns Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion Fumes and Gases can be hazardousBuildup of GAS can injure or kill ARC Rays can burn eyes and skinCompressed Air Hazards Engine HazardsFalling Unit can cause injury Welding Wire can cause injuryHOT Parts can cause burns and injury Fire or Explosion hazardRadiation can cause interference Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationIndique des instructions spécifiques Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation UN Choc Électrique peut tuerLE Bruit peut affecter l’ouïe DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Fumées ET LES GAZ peuvent être dangereux LE Soudage peut provoquer un in cendie ou une explosionDES Organes Mobiles peuvent pro voquer des blessures ’EXPLOSION DE LA Batterie peuRisque D’INCENDIE OU D’EXPLO- Sion LA Chaleur DU Moteur peut pro- voquer un incendie’AIR Comprimé peut provoquer des blessures ’EMPLOI Excessif peut LE Surchauffement peut endom- mager le moteur électriqueDES Organes Mobiles peuvent provoquer des blessures LES Fils DE Soudage peuvent provoquer des blessuresEn ce qui concerne les implants médicaux Proposition californienne 65 AvertissementsPrincipales normes de sécurité Information EMFStd − Definitions− 50 h Std Manufacturer’s Rating Label Some symbols are found only on CE products Symbols And DefinitionsDimensions, Weights, And Operating Angles − SpecificationsWeld, Power, And Engine Specifications Volt-Ampere Curves Stick ModeMIG Mode TIG ModeThis unit is rated for welding at 250 amperes continuously Curve shows typical fuel use under weld or power loadsFuel Consumption Duty Cycle And Overheating150 125 100 AC Generator Power CurveGrounding1 − InstallationInstalling Welding Generator Location/Airflow ClearanceTo Weld Unit In Place Mounting Welding GeneratorSupporting The Unit Mounting SurfacePoint exhaust pipe in desired di Installing Exhaust PipeTools Needed 1/2 Stop engine and let coolClose door after connecting battery Activating The Dry Charge Battery If ApplicableConnecting The Battery Do not overfill battery cellsOil Coolant Recovery TankEngine Prestart Checks FuelStop engine Connecting To Weld Output TerminalsStick and TIG Welding MIG and Fcaw Welding150 ft 200 ft 250 ft Stop engine Before Connecting to Weld Output terminalsSelecting Weld Cable Sizes Socket Information Connecting To Remote 14 Receptacle RC14Welding Symbols Front Panel Controls See Section − Operating Welding GeneratorDescription Of Front Panel Controls See Section Process/Contactor Switch Settings Process/Contactor SwitchLift-Arc t TIG Lift-ArcStart ProcedureLift-Arc Start Method Touch Do not Strike Like a MatchRemote Voltage/Amperage Control At least once a month, run engine at Generator Power Receptacles− Operating Auxiliary Equipment Routine Maintenance − Maintenance & TroubleshootingMaintenance Label To clean air filter Servicing Air CleanerServicing Engine Cooling System Inspecting And Cleaning Optional Spark Arrestor MufflerDo not set engine speed higher Adjusting Engine Speed On Standard ModelsMay affect engine warranty MaximumRpm max 62.6 Hz 1500 rpm 50 Hz Engine Speed AdjustmentWeld/Power Speed Adjustment Engine Speed No LoadTo drain water from fuel system Servicing Fuel And Lubrication SystemsTo change oil and filter To replace primary canister fuel filterOverload Protection Replace Damaged Brushes Checking Generator BrushesHelp 25 Display Voltmeter/Ammeter Help DisplaysHelp 20 Display Welding TroubleshootingEngine Generator PowerCheck for obstructed throttle solenoid Material Thickness Reference Chart Circuit Diagram For Welding Generator − Electrical Diagrams219 228−E Welding Generator − RUN-IN ProcedureWetstacking Cycle or equipment damage may Run-In Procedure Using Load BankFrom flammables Output and do not exceed dutyRun-In Procedure Using Resistance Grid Grounding Generator To Truck Or Trailer Frame − Generator Power GuidelinesSelecting Equipment Amperes x Volts = Watts Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Use ground device as stated in electrical codesFarm/Home Equipment Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Industrial Motors Rating Starting Watts Running WattsContractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor EquipmentKVA/HP x HP x 1000 / Volts = Starting Amperage Power Required To Start MotorHow Much Power Can Generator Supply? Single-Phase Induction Motor Starting RequirementsTypical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible 101 111 110 −3 109 108 −2 107 102 103 9897 104 106 105 − Parts List4243 80Fig.12−46665 TE1 Dia Part Description Quantity Mkgs Batt Panel, Front w/Components -1Item Panel, Front w/ComponentsFUEL/HM Control Panel Generator -1Item GeneratorRectifier Assembly Wiring Harnesses Support ServiceYour distributor also gives Your distributor and/or equipment manufacturer’s To locate a Distributor or Service Agency visitMiller Electric Mfg. Co For assistance in filing or settling claims, contact

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