Electrical Diagrams | Miller Electric Bobcat 250 manual

SECTION 12 − ELECTRICAL DIAGRAMS

Figure 12-1. Circuit Diagram For Welding Generator

OM-4419 Page 46

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Miller Electric Bobcat 250 manual Electrical Diagrams, Circuit Diagram For Welding Generator

Contents

Visit our website at OM-4419File Engine Drive 2007−05 From Miller to You Table of Contents 10-3 10-110-2 11-1 Electric Shock can kill Symbol UsageArc Welding Hazards HOT Parts can cause severe burns ARC Rays can burn eyes and skin Fumes and Gases can be hazardousBuildup of GAS can injure or kill Welding can cause fire or explosion Engine Hazards Compressed Air Hazards Fire or Explosion hazard Welding Wire can cause injuryHOT Parts can cause burns and injury Falling Unit can cause injury EMF Information Principal Safety StandardsCalifornia Proposition 65 Warnings Radiation can cause interference UN Choc Électrique peut tuer Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation Indique des instructions spécifiques LE Soudage peut provoquer un in cendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Fumées ET LES GAZ peuvent être dangereux DES Organes Mobiles peuvent pro voquer des blessures LE Bruit peut affecter l’ouïe’EXPLOSION DE LA Batterie peu Risque D’INCENDIE OU D’EXPLO- Sion LA Chaleur DU Moteur peut pro- voquer un incendie’AIR Comprimé peut provoquer des blessures LES Fils DE Soudage peuvent provoquer des blessures LE Surchauffement peut endom- mager le moteur électriqueDES Organes Mobiles peuvent provoquer des blessures ’EMPLOI Excessif peut Information EMF Proposition californienne 65 AvertissementsPrincipales normes de sécurité En ce qui concerne les implants médicaux Weld, Power, and Engine Specifications − SpecificationsSymbol Definitions − Definitions Robin-PoweredUnit 560 lb 254 kg Dimensions, Weights, and Operating AnglesDimensions For Units With Optional Running Gear Dimensions Fuel Consumption Robin-Powered Units Fuel Consumption Kohler-Powered Units Volt-Ampere Curves For CC/AC ModeFor CC/DC Mode For CV/DC Mode 100% Duty Cycle at 250 Amperes Generator Power CurveDuty Cycle − Installation Installing Welding Generator Oil Check Engine Prestart Checks Robin-Powered Units0000 Oil Engine Prestart Checks Kohler-Powered Units Open top service door Connecting The Battery Connect negative − cable last Installing Exhaust PipeConnecting Or Replacing the Battery + − Stop engine Connecting to Weld Output TerminalsTools Needed Correct Installation Work Weld Output Terminal Selecting Weld Cable Sizes − Operating the Welding Generator Front Panel Controls Loaded Cold Weather Engine OperationInfrequently Frequently Loaded Work Clamp Electrode Holder Typical Stick Welding Connections And Control SettingsTypical Settings For 7018 1/8 in Electrode Tools Needed 3/4 Fine Control, Weld Process switch Settings Quick connector Typical MIG Welding Connections And SettingsSolid Wire Applications Be sure to use the correct size weld cables see Section Self-Shielded Flux Core Wire Applications Fine Control, Weld Process switch Settings Work Typical Settings For 4043Aluminum On 1/8 in Material Lines and may not suit all applications Cables see Section Generator Power Receptacles − Operating Auxiliary Equipment Current Available in Amperes 240 Simultaneous Weld And PowerWiring Optional 240 Volt Plug Receptacle 200 Routine Maintenance Robin-Powered Units100 500 Maintenance Label Robin-Powered Units Stop engine. Disconnect negative − battery cable Servicing Air Cleaner Robin-Powered UnitsOverload Protection Robin-Powered Units Stop engine and let cool Oil Fill Oil CheckFull Oil Drain Valve 2 ID x 7 in Hose Oil Filter Turn idle speed screw for fine adjustments Adjusting Engine Speed Robin-Powered UnitsIdle Speed Adjustment Weld/Power Speed Adjustment Servicing Optional Spark Arrestor Robin-Powered Units Material Thickness Reference Chart Routine Maintenance Kohler-Powered Units Hours Nl Weld Cables ~ Slip Rings Nl Brushes OM-4419 Maintenance Label Kohler-Powered Units Servicing Air Cleaner Kohler−Powered Units Close valve and valve cap before adding oil Full Stop engine and let cool Oil Drain Valve2 ID x 7 in Hose Oil Filter Up fuel Adjusting Engine Speed Kohler-Powered Units Turn idle speed screw for fine ad- justments Overload Protection Kohler-Powered Units Servicing Optional Spark Arrestor Kohler-Powered Units Generator Power Troubleshooting − TroubleshootingWelding Troubleshooting Trouble Remedy Check fuel level Engine TroubleshootingCheck receptacle wiring and connections Recommended Spare Parts − Parts ListSwitch S2, and throttle solenoid TS1 Recommended Spare Parts − Electrical Diagrams Circuit Diagram For Welding Generator 228 460-A Grounding Generator To Truck Or Trailer Frame − Generator Power GuidelinesSelecting Equipment Electrically Bond Generator Use ground device as stated in electrical codes Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Amperes x Volts = Watts Industrial Motors Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Farm/Home Equipment Rating Starting Watts Running Watts Approximate Power Requirements For Contractor Equipment Contractor Rating Starting Watts Running Watts Single-Phase Induction Motor Starting Requirements Power Required To Start MotorHow Much Power Can Generator Supply? KVA/HP x HP x 1000 / Volts = Starting Amperage Typical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible − Stick Welding Smaw Guidelines Stick Welding ProcedureWeld current starts when electrode touches work- piece Striking an Arc − Tapping Technique Electrode and Amperage Selection ChartStriking an Arc − Scratch Start Technique Positioning Electrode Holder Poor Weld Bead CharacteristicsGood Weld Bead Characteristics 10-30 9090 Conditions That Affect Weld Bead Shape Electrode Movement During Welding Tee Joint Butt JointsLap Joint Or Less Weld Test Troubleshooting − PorosityTroubleshooting − Excessive Spatter Possible Causes Corrective Actions Troubleshooting − Excessive Penetration Troubleshooting − Incomplete FusionTroubleshooting − Lack Of Penetration Troubleshooting − Distortion Troubleshooting − Burn-ThroughTroubleshooting − Waviness Of Bead − MIG Welding Gmaw Guidelines Holding And Positioning Welding Gun Slow Normal Fast Push Perpendicular DragShort Normal Long Gun Movement During Welding 15-9 Troubleshooting − Excessive Penetration 15-7 Troubleshooting − Excessive Spatter15-8 Troubleshooting − Porosity Improper joint preparation Lack Of Penetration − shallowFusion between weld metal Unsteady hand Support hand on solid surface or use two hands Fillet Common MIG Shielding GasesApplication Page Support ServiceYour distributor also gives For assistance in filing or settling claims, contact To locate a Distributor or Service Agency visitMiller Electric Mfg. Co Your distributor and/or equipment manufacturer’s