Hobart Welding Products 125 manual Process/Polarity Table, Changing Polarity

Page 18

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

5-2. Process/Polarity Table

Process

Polarity

Cable Connections

 

 

Cable To Gun

Cable To Work Clamp

 

 

 

 

 

 

FCAW − Self-shielding wire −

DCEN − Straight Polarity

Connect to negative (−)

Connect to positive (+) output

no shielding gas

 

output terminal

terminal

 

 

 

 

GMAW* − Solid wire with

DCEP − Reverse polarity

Connect to positive (+) out-

Connect to negative (−) output

shielding gas

 

put terminal

terminal

 

 

 

 

* Unit must have MIG conversion kit 195 158 installed.

5-3.

Changing Polarity

 

 

 

1 Lead Connections For Direct

 

 

Current Electrode Negative

 

 

(DCEN)

 

 

2 Lead Connections For Direct

 

 

Current Electrode Positive

 

 

(DCEP)

 

 

Always read and follow wire

 

 

manufacturer’s recommended po-

 

 

larity, and see Section 5-2.

 

 

Close door.

 

1

2

 

 

Ref. 210 428

OM-947 Page 14

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Contents Processes DescriptionFile Flux Cored Fcaw From Hobart to You Protect Your InvestmentTable of Contents 10-1 10-2Electric Shock can kill Symbol UsageArc Welding Hazards HOT Parts can burnWelding can cause fire or explosion Fumes and Gases can be hazardousARC Rays can burn eyes and skin Flying Metal or Dirt can injure eyesFalling Equipment can injure Welding Wire can injureFire or Explosion hazard Moving Parts can injureEMF Information Principal Safety StandardsCalifornia Proposition 65 Warnings About Implanted Medical DevicesSymboles utilisés UNE Décharge Électrique peut entraîner la mortIndique des instructions spécifiques LES Pièces Chaudes peuvent provoquer des brûlures LES Fumées ET LES GAZ peuvent être dangereuxLE Soudage peut provoquer un incendie ou une explosion Risque D’INCENDIE OU LE Bruit peut endommager l’ouïeLES Bouteilles peuvent exploser si elles sont endommagées LA Chute DE L’ÉQUIPEMENT peut provoquer des blessuresLES Fils DE Soudage peuvent provoquer des blessures Proposition californienne 65 AvertissementsLes Pièces Mobiles peuvent causer des blessures LE Soudage À L’ARC risque de provoquer des interférencesPrincipales normes de sécurité Informations relatives aux CEMEn ce qui concerne les implants médicaux OM-947 Specifications − SpecificationsSymbols And Definitions − DefinitionsVolt-Ampere Curves WarrantyDuty Cycle And Overheating Can damage unit or gun and void− Installation Installing Work ClampSlide insulating grips over handles Tools Needed OM-947 Process/Polarity Table Changing PolarityInstalling Gas Supply Tools Needed 11/16, 1-1/8 Shielding GasInstalling Wire Spool And Adjusting Hub Tension Only applies to units equipped withOptional hub kit Serial Number And Rating Label Location Selecting a Location And Connecting 115 Volt Input PowerMake this installation SectionInstalling Contact Tip And Nozzle Turn off welding power sourceThreading Welding Wire Hold wire tightly to keep it from unravelingOperating The Gun − OperationControls LoadWeld Parameter Chart Overload Protection − Maintenance &TROUBLESHOOTINGRoutine Maintenance Drive Motor ProtectionChanging Drive Roll Or Wire Inlet Guide Retaining Knob OpeningTurn Off power before replacing contact tip Replacing Gun Contact TipThread wire according to Cleaning Gun LinerHold wire tightly to keep it From unraveling. SecureTools Needed Head Tube Mm / 10 mm Remove black sleeving from end of replacement linerReplacing Gun Liner Tube. Separate gun handle halves10 mm Power source see Section Troubleshooting TableSecure power cord plug in receptacle see Section Trouble Remedy− Electrical Diagram Circuit Diagram− FCAW/GMAW Welding Guidelines Typical Fcaw Process ConnectionsTypical Gmaw MIG Process Connections Amperage Typical Control SettingsWire Size Amperage Range Select VoltageHolding And Positioning Welding Gun End View of Work AngleConditions That Affect Weld Bead Shape Short Normal LongSlow Normal Poor Weld Bead Characteristics Good Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Spatter Troubleshooting − PorosityPossible Causes Corrective Actions Troubleshooting − Excessive Penetration Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Distortion Troubleshooting − Burn-ThroughTroubleshooting − Waviness Of Bead Base metal to moveApplication Troubleshooting Guide For Semiautomatic Welding EquipmentCommon Gmaw MIG Shielding Gases FilletGas hose in gun and cable assembly Gas nozzle plugged Clean or replace gas nozzleOpen gas valve at cylinder and adjust flow rate Loose or broken wires to gas solenoidConsumables − ACCESSORIES/CONSUMABLESAccessories PkgMaterial Thickness Reference Chart Work like a Pro Service SupportAssistance Contact your Distributor for Hobart Welding Products
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