OM-1325 Page 37
8-11. Troubleshooting
−
Lack Of Penetration
Lack Of Penetration
−
shallow
fusion between weld metal and
base metal.
Lack of Penetration
Good Penetration
S-0638
Possible Causes
Corrective Actions
Improper joint preparation.
Material too thick. Joint preparation and design must provide access to bottom of groove while
maintaining proper welding wire extension and arc characteristics.
Improper weld technique.
Maintain normal gun angle of 0 to 15 degrees to achieve maximum penetration.
Keep arc on leading edge of weld puddle.
Be sure welding wire extends not more than 1/2 in (13 mm) beyond nozzle.
Insufficient heat input.
Select higher wire feed speed and/or select higher voltage range.
Reduce travel speed.
8-12. Troubleshooting
−
Incomplete Fusion
Incomplete Fusion
−
failure of weld metal to fuse completely with
base metal or a preceeding weld bead.
S-0637
Possible Causes
Corrective Actions
Workpiece dirty.
Remove all grease, oil, moisture, rust, paint, undercoating, and dirt from work surface before
welding.
Insufficient heat input.
Select higher voltage range and/or adjust wire feed speed.
Improper welding technique.
Place stringer bead in proper location(s) at joint during welding.
Adjust work angle or widen groove to access bottom during welding.
Momentarily hold arc on groove side walls when using weaving technique.
Keep arc on leading edge of weld puddle.
Use correct gun angle of 0 to 15 degrees.
8-13. Troubleshooting
−
Burn-Through
Burn-Through
−
weld metal melting completely through base metal
resulting in holes where no metal remains.
S-0640
Possible Causes
Corrective Actions
Excessive heat input.
Select lower voltage range and reduce wire feed speed.
Increase and/or maintain steady travel speed.
Содержание Millermatic 210
Страница 25: ...OM 1325 Page 21 Notes...
Страница 27: ...OM 1325 Page 23 204 890...
Страница 34: ...OM 1325 Page 30 SECTION 7 ELECTRICAL DIAGRAM 204 891 A Figure 7 1 Welding Power Source Circuit Diagram...
Страница 45: ...OM 1325 Page 41 Notes...
Страница 52: ...OM 1325 Page 48 Ref 800 792 C 1 2 3 4 5 6 7 8 9 10 15 18 11 12 11 12 13 9 16 17 14 Figure 9 5 M 25 Gun...
Страница 56: ...Notes...
Страница 57: ...Notes...
Страница 58: ...Notes...