Miller Electric DB1825R, DB1812R manual Essary

Page 10

Trouble

Remedy

 

 

 

 

Wandering arc

Shield weld zone from drafts.

 

 

 

Reduce gas flow rate.

 

 

 

Select proper size and type tungsten. Properly prepare tungsten according to Section 5.

 

 

 

When using AC, check welding power source High Frequency control setting, and increase setting if nec-

 

essary.

 

 

Yellow powder or smoke on cup.

Use proper type shielding gas.

 

 

 

Check for proper gas flow rate. Check manufacture’s recommendations.

 

 

 

Increase postflow time.

 

 

 

Check torch cup size. Match cup size to joint being welded.

 

 

Erratic arc

When using DC, check polarity, and/or polarity of welding cables.

 

 

 

When using AC, check welding power source High Frequency control setting, and be sure it is operating

 

continuously.

 

 

 

Select proper size and type tungsten. Properly prepare tungsten according to Section 5.

 

 

 

Use proper arc length. Arc length may be too long or too short.

 

 

 

Make sure base material is clean and free of contaminates.

 

 

 

When using AC, slow travel speed can cause erratic arc. Adjust travel speed.

 

 

Porosity in weld.

Check for proper gas flow rate. Check manufacture’s recommendations.

 

 

 

Check and tighten gas fittings.

 

 

 

Make sure base material and filler material is clean and free of contaminates.

 

 

 

Check for impurities and moisture in gas lines. Purge if necessary.

 

 

 

If torch is water cooled, check torch and cables for water leaks. Repair or replace if necessary (see Sec-

 

tion 4-1).

 

 

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Contents
Diamondback Series Gtaw Torches Table of Contents Symbol Usage −SAFETY Precautions for Gtaw Torches − Read Before UsingGtaw Torch Hazards EMF Information About PacemakersSpecifications − SpecificationsDuty Cycle International Style Connector Assembly − InstallationRequired Torch Parts And Torch Assembly Installing TungstenConnecting Torch Connections Troubleshooting − Maintenance & TroubleshootingRoutine Maintenance Disconnect torch before maintaining HoursEssary Amperage Range Gas Type Polarity DC − Argon − Elec AC − Argon AC − Argon −Positioning The Torch − Guidelines for TIG Welding GtawPreparing Tungsten Electrode For Welding Clamp as close to the weld as possibleTungsten Without Filler Rod Torch Movement During WeldingPositioning Torch Tungsten For Various Weld Joints Tungsten With Filler Rod− Parts List Complete Torch AssemblyQuantity 198 English Page Service SupportOwner’s Record