Hobart Welding Products 230 Troubleshooting − Waviness Of Bead, Troubleshooting − Distortion

Page 42

6-14. Troubleshooting − Waviness Of Bead

Waviness Of Bead − weld metal that is not parallel and does not cover joint formed by base metal.

S-0641

Possible Causes

Corrective Actions

 

 

Welding wire extends too far out of nozzle.

Be sure welding wire extends not more than 1/2 in (13 mm) beyond nozzle.

 

 

Unsteady hand.

Support hand on solid surface or use two hands.

 

 

6-15. Troubleshooting − Distortion

 

 

 

Distortion − contraction of weld metal during welding that forces

 

 

 

base metal to move.

 

 

Base metal moves

 

 

 

 

 

in the direction of

 

 

the weld bead.

 

 

 

S-0642

 

 

 

 

Possible Causes

 

 

Corrective Actions

 

 

 

 

Excessive heat input.

 

 

Use restraint (clamp) to hold base metal in position.

 

 

 

 

 

 

 

Make tack welds along joint before starting welding operation.

 

 

 

 

 

 

 

Select lower voltage range and/or reduce wire feed speed.

 

 

 

 

 

 

 

Increase travel speed.

 

 

 

 

 

 

 

Weld in small segments and allow cooling between welds.

 

 

 

 

OM-235 281 Page 38

Page 41 Page 43
Image 42
Page 41 Page 43
Contents Description OM-235 281AProcesses File MIG GmawFrom Hobart to You Protect Your InvestmentTable of Contents Warranty Electric 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 mortDES Pièces Chaudes peuvent provoquer des brûlures graves LES Fumées ET LES GAZ peuvent être dangereuxLE Soudage peut provoquer un in cendie ou une explosion Risque D’INCENDIE OU D’EXPLO- Sion LE Bruit peut endommager l’ouïeLES Bouteilles peuvent exploser si elles sont endommagées LA Chute DE L’APPAREIL peut blesserProposition californienne 65 Avertissements LES Fils DE Soudage peuvent provoquer des blessuresLE Soudage À L’ARC risque de provoquer des interférences Principales normes de sécurité Information EMFEn ce qui concerne les implants médicaux OM-235 281 Specifications Welding Power Source Duty Cycle And OverheatingOverheating Amperage Volt-Ampere CurvesVoltage 40.0 35.0 30.0 25.0 20.0 15.0 10.0 100 150 200 250 300Installing Welding Gun MIG GUNConnecting To Weld Output Terminals Installing Work ClampChanging Polarity Setting Gun Polarity For Wire TypeInstalling 2 lb Wire Spool And Adjusting Hub Tension Electrode Negative DcenInstalling 10 lb Wire Spool And Adjusting Hub Tension Installing 33 lb Wire Spool And Adjusting Hub TensionInstalling Gas Supply Rear PanelTools Needed 1-1/8, 5/8 Turn off and disconnect input power Positioning Jumper LinksInput Voltage Electrical Service GuideHz Single Input Amperes At Rated OutputSpecial installation may be Selecting a Location And Connecting Input PowerDo not move or operate unit where it could tip Conductors from unitThreading Welding Wire Turn Off unit, and disconnect input power Wire Speed Control Controls3070 2080 1090 Selecting Wire, Gas and Control Settings Weld ParametersSupplementary Protectors Routine MaintenanceDisconnect power Before maintainingReplacing Drive Roll And Wire Inlet Guide Turn Off powerRemoving Knob From Front Panel Aligning Drive Rolls and Wire Guide Turn Off power before replacing contact tipReplacing Gun Contact Tip Installing Cable Hangers Turn Off power before Installing cable hangersCable Hanger Screws Tools Needed Turn off welding power source/wire feeder Wire Drive/Gun Trouble Remedy Welding Troubleshooting TableWire Drive/Gun Troubleshooting Table Welding Trouble Remedy− MIG Welding Gmaw Guidelines Typical MIG Process ConnectionsAmperage Typical MIG Process Control SettingsWire Size Amperage Range Select VoltageHolding And Positioning Welding Gun Groove WeldsPerpendicular Drag Conditions That Affect Weld Bead ShapePush Short Normal LongPoor Weld Bead Characteristics Good Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Penetration Troubleshooting − Excessive SpatterTroubleshooting − Porosity Possible Causes Corrective ActionsTroubleshooting − Lack Of Penetration Troubleshooting − Incomplete FusionTroubleshooting − Burn-Through Base metal to move Troubleshooting − Waviness Of BeadTroubleshooting − Distortion DirectionTroubleshooting Guide For Semiautomatic Welding Equipment Common MIG Shielding GasesApplication Welding power source Welding arc not stable Wire slipping in drive rollsReadjust welding parameters Drive rolls if necessary− Electrical Diagram Main Assembly 10 − Fig 17 − FigItem Dia Part Description Quantity Mkgs Center Baffle w/Components Center Baffle w/Components -1Item Rear Panel w/Components Front Panel w/Components Wire Drive Assembly 234 Wire Drive AssemblyH200L4−15 Gun 237Accessories Knurl Drive Roll For Hard Shell Cored WiresService SupportAssistance Contact your Distributor for Hobart Welding Products
Top Page Image Contents