Hobart Welding Products 700I, HP-70 manual Troubleshooting Torch, Arc goes on and off while cutting

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.A complete Parts List is available at www.MillerWelds.com

6-8. Troubleshooting Torch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Trouble

Remedy

 

 

 

 

 

 

 

 

 

 

Arc goes on and off while cutting.

Torch travel speed too slow; increase travel speed (see Section 5-2). Clean or replace torch consumables

 

 

 

 

as necessary (see Section 6-5). Be sure work clamp is securely attached to workpiece.

 

 

 

 

 

Arc goes out while cutting.

Be sure work clamp is securely attached to workpiece. Make sure tip is on or near [1/16 in. (1.6 mm) to

 

 

 

 

1/8 in. (3.2 mm)] workpiece (see Section 5-6). Clean or replace torch consumables as necessary (see

 

 

 

 

Section 6-5).

 

 

 

 

 

Sparks come out top of cut or cut is not

Torch travel speed too fast; reduce travel speed (see Section 5-2). Clean or replace torch consumables

clean.

as necessary (see Section 6-5). Be sure work clamp is securely attached to workpiece. Unit not capable

 

 

 

 

of cutting metals thicker than rating (see Section 5-2).

 

 

 

 

 

Trouble lights are on; unit has no cutting

Check torch consumables. Check for gas/air flow at torch. Check air supply connection and pressure to

output.

unit and torch. Reset unit Power switch. Have Factory Authorized Service Agent check torch and

 

 

 

 

connections inside unit.

 

 

 

 

 

OM-244 013 Page 31

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Contents File Plasma Cutters OM-244 013CProcesses DescriptionFrom Miller to You Table of Contents Page Electric Shock can kill Symbol UsagePlasma Arc Cutting Hazards Cutting can cause fire or explosionFumes and Gases can be hazardous Flying Sparks can injureARC Rays can burn eyes and skin Noise can damage hearingOveruse can cause Overheating HOT Parts can burnMoving Parts can injure Flying Metal or Dirt can injure eyesAbout Implanted Medical Devices Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationUN Choc Électrique peut tuer Signification des symbolesConsignes DE Sécurité Lire Avant Utilisation LE Coupage présente un risque de feu ou d’explosionLES Fumées ET LES GAZ peuvent être dangereux Risque de blessure en casLES Étincelles Projetées peuvent provoquer des blessures LE Bruit peut endommager l’ouïeLes Pièces Mobiles peuvent provoquer des blessures ’ARC Plasma peut provoquer des blessuresLES Bouteilles peuvent exploser si elles sont endommagées LES Pièces Chaudes peuvent provoquer des brûluresLE Coupage à L’ARC peut causer des interférence ’EMPLOI Excessif peutLA Chute DE L’ÉQUIPEMENT peut provoquer des blessures Risque D’INCENDIE OUEn ce qui concerne les implants médicaux Proposition californienne 65 AvertissementsPrincipales normes de sécurité Informations relatives aux CEMI1eff DefinitionsI1max Specifications InstallationDuty Cycle And Overheating Power Source Dimensions And WeightTorch Dimensions And Weight Dimensions And WeightSelecting a Location Connecting Gas/Air SupplyConnecting Work Clamp Do not move or operate unit where it could tipExtension Cord Data Electrical Service GuideSerial Number And Rating Label Location Connecting 1-Phase Input Power For 240 VACTerminal, never to a load Engine Control Switch must be set at RUNProng Not Used Always connect green orCable Management Strap Installing Alternative PlugElectrode Wrench Controls OperationMild Steel Recommended Cut Speed Trigger Safety LockPlasma Cutting System Practices Pilot arc starts immediately when trigger is pressedExample Of Cutting Operation Sequence Of Cutting OperationExample Of Cutting Using Stand-off Guide Sequence Of Cutting Using Stand-off GuideSequence Of Piercing Operation Before maintaining Maintenance & TroubleshootingRoutine Maintenance Disconnect powerChecking Or Replacing Filter Element Checking Shield Cup Shutdown System Status/Trouble LightsElectrode Wrench Turn Off power source before checking torch partsChecking/Replacing Retaining Cup, Tip, And Electrode Work Cable Connections Torch And Work Cable ConnectionsTorch Connections Trouble Remedy Troubleshooting Power SourceArc goes on and off while cutting Troubleshooting TorchCircuit Diagram Electrical Diagram244 011-B Recommended Spare Parts Parts ListRecommended Spare Parts Support ServiceMiller Electric Mfg. Co Owner’s Record