Miller Electric Axcess 450 manual Welding Circuit, Gun TravelWCL Current Flow Path

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5-2. Welding Circuit

. Minimizing the welding circuit loop can prevent extreme voltage drops that produce poor welding characteristics.

1

Standard Welding Circuit

3

ECL2

6

4

5

Gun

TravelWCL

7

WL

Current Flow Path

Large Weld Structure

1

3

ECL2

6

4

1Welding Power Source

2Electrode Cable

3Feeder Cable

4Work Cable

5Voltage Sensing Lead

6Wire Feeder

7Workpiece

In pulse welding applications using inverter power sources, cable resistance can result in less than satisfactory performance. In most cases, a welding circuit length of 50 ft (15 m) or less will provide satisfactory performance with a standard welding circuit connection.

The length of a welding circuit is determined as follows:

Welding Circuit = Electrode Cable Length (ECL) + Work Cable Length (WCL) + Workpiece Length (WL)

See Section 5-1for weld cable size.

Variations in welding processes and welding circuit resistance can affect apparent voltage at the welding arc. Voltage sensing can improve welding performance by providing accurate feedback to the welding power source.

It is important to connect the voltage sensing lead as near to the weld as possible, but not in the return current path.

2

5

WCL

7WL

Current Flow Path

Ref. 804 457-A

OM-220 389 Page 22

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Contents OM-220 389J ProcessesDescription File Advanced Manufacturing SystemsFrom Miller to You Table of Contents − Troubleshooting Standards DirectivesDecstat1/07 Page Symbol Usage Arc Welding HazardsElectric Shock can kill HOT Parts can cause severe burnsFumes and Gases can be hazardous ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal or Dirt can injure eyesWelding Wire can cause injury Fire or Explosion hazardFalling Unit can cause injury Moving Parts can cause injuryPrincipal Safety Standards California Proposition 65 WarningsEMF Information About Implanted Medical DevicesSymboles utilisés UNE Décharge Électrique peut entraîner la mortLES Fumées ET LES GAZ peuvent être dangereux DES Pièces Chaudes peuvent provoquer des brûlures gravesLE Soudage peut provoquer un in cendie ou une explosion LE Bruit peut endommager l’ouïe LES Bouteilles peuvent exploser si elles sont endommagéesRisque D’INCENDIE OU D’EXPLO LA Chute DE L’APPAREIL peut blesserLES Fils DE Soudage peuvent provoquer des blessures Proposition californienne 65 AvertissementsLE Soudage À L’ARC risque de provoquer des interférences Information EMF Principales normes de sécuritéEn ce qui concerne les implants médicaux OM-220 389 Disconnect input plug or power before working on machine − DefinitionsManufacturer’s Warning Label Definitions Keep your head out of the fumesWeee Label Symbols And Definitions I1maxI1eff Manufacturer’s Rating Label− Installation SpecificationsDimensions And Weight 17-3/32 in 434 mm 17-3/8 in 441 mm 19-3/32 in 485 mmDuty Cycle And Overheating Volt-Ampere Curves100% Duty Cycle At 450 Amperes OverheatingSelecting a Location Connection DiagramDo not stack units. Beware of tipping Rear Panel Receptacles And Supplementary Protectors Connecting To Weld Terminals Incorrect InstallationNetwork Wire Feeder Receptacle Functions Electrical Service GuidePin 50/60 HzWelding Power Source Input Power Connections Connecting Input PowerDisconnect Device Input Power Connections − Recommended Setup Procedures Selecting Weld Cable SizesWelding Circuit Gun TravelWCL Current Flow PathBest Using Multiple Welding Power Sources Bad Setup Wire Feeder Drop in the workpiece. The voltage dropBetter Setup Supporting separate voltage feedback to OM-220 389Best Setup − Operation Front Panel SwitchesPDA Port PC Port OM-220 389 Routine Maintenance − MaintenanceBlowing Out Inside of Unit − Safety Precautions for Servicing Shock Hazard from testingServicing Hazards Exploding Parts can cause injuryCalifornia Proposition 65 Warnings − Troubleshooting Removing Cover and Measuring Input Capacitor VoltageDiagnostic LED’s On Process Control Module PC4 Process Control Module PC4 Diagnostic LED’sStatus Diagnosis Network And Module Status LED’s Network Status LED’s Module Status LED’sRed Circuit board is operating normallyTroubleshooting Trouble Remedy− Electrical Diagrams Circuit Diagram For Welding Power Source220 420-B − Parts List 16 − FigWindtunnel Assembly LH And RH Windtunnel Assembly LH And RH -1Item Top Tray Assembly Rear Panel Assembly Front Panel Assembly Dia Part Your distributor also gives ServiceSupport To locate a Distributor or Service Agency visit Miller Electric Mfg. CoFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s