Miller Electric Millermatic DVI manual Gun Movement During Welding, Poor Weld Bead Characteristics

Page 42

8-5. Gun Movement During Welding

NOTE

Normally, a single stringer bead is satisfactory for most narrow groove weld joints; however, for wide groove weld joints or bridging across gaps, a weave bead or multiple stringer beads works better.

1

2

3

1Stringer Bead − Steady Movement Along Seam

2Weave Bead − Side To Side Movement Along Seam

3Weave Patterns

Use weave patterns to cover a wide area in one pass of the electrode.

S-0054-A

8-6. Poor Weld Bead Characteristics

 

1

Large Spatter Deposits

1

2

Rough, Uneven Bead

3

Slight Crater During Welding

 

 

4

Bad Overlap

 

5

Poor Penetration

2

3

4

5

S-0053-A

8-7. Good Weld Bead Characteristics

 

 

 

1

Fine Spatter

 

 

 

2

Uniform Bead

 

 

1

3

Moderate Crater During

 

 

 

 

Welding

 

 

 

Weld a new bead or layer for each

 

 

 

1/8 in (3.2 mm) thickness in metals

 

 

 

being welded.

 

 

 

4

No Overlap

 

 

 

5

Good Penetration into Base

2

3

4

 

Metal

 

 

5

S-0052-B

OM-1330 Page 38

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Contents Description OM-1330220 237HProcesses File MIG GmawFrom Miller to You Table of Contents − Parts List Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killCalifornia Proposition 65 Warnings Principal Safety Standards EMF InformationAbout Pacemakers UNE Décharge Électrique peut entraîner la mort LES Fumées ET LES GAZ peuvent être dangereuxIndique un message de sécurité particulier DES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer unIncendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures graves’EMPLOI Excessif peut SUR Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser DES Organes Mobiles peuvent provoquer des blessuresPrincipales normes de sécurité En ce qui concerne les stimulateurs cardiaquesGeneral Specifications Symbols And DefinitionsSpecifications 115 VACDuty Cycle And Overheating OverheatingVolt-Ampere Curves MIG Welding Gun Duty Cycle And OverheatingDefinition Connecting To Weld Output Terminals Installing Work ClampInstalling Welding Gun Setting Gun Polarity For Wire TypeInstalling Gas Supply Rear PanelInstalling MIG Wire Spool and Adjusting Hub Tension Installing 1 Or 2 lb Wire SpoolConnecting 1-Phase Input Power For 230 VAC Electrical Service Guide For 230 VAC Hz Single PhaseExtension Cord Data Selecting a Location And Connecting Input Power Do not move or operate unit where it could tipThreading Welding Wire ScaleInstalling Diverter Valve And Switch For Optional Spool Gun Turn Off unit, and disconnect input powerOperation Connecting An Optional Spool Gun End of hose− Operation ControlsOM-1330 Weld Parameter Chart 220 493-A Routine Maintenance Supplementary Protector CB1Months Unit Overload Changing Drive Roll and Wire Inlet GuideTurn Off power Replacing Gun Contact TipAligning Drive Rolls and Wire Guide Removing Knob From Front PanelCleaning Or Replacing Gun Liner Disconnect gun from unitTo Reassemble Gun Replacing Switch And/Or Head Tube Disconnect gun firstTroubleshooting Welding Trouble Remedy− Electrical Diagram 220 197-E − MIG Welding Gmaw Guidelines Typical MIG Process ConnectionsSelect Wire Size Typical MIG Process Control SettingsWire Recommendation Wire Speed Select VoltageHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Poor 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 Troubleshooting − Waviness Of Bead Troubleshooting − DistortionCommon MIG Shielding Gases Troubleshooting Guide For Semiautomatic Welding EquipmentWire does not feed ApplicationWelding arc not stable Wire slipping in drive rolls − Parts List CABLE,POWER 12 FT 5 in 12GA 4C Soow W/SPL Plug Baffle, Center w/Components Baffle, Center w/Components -1Item Panel, Rear w/Components Panel, Front w/Components See Section Drive Roll & Wire Guide Kits 204857M-10 Gun Drive Roll And Wire Guide Kits 207 Optional Spoolmate Spool Gun SwitchPage Page Service SupportOwner’s Record Miller Electric Mfg. Co
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