Troubleshooting − Incomplete Fusion; Troubleshooting − Burn-Through; Troubleshooting − Waviness Of Bead - Hobart Handler 125 EZ Owner's Manual

Possible Causes
Improper weld technique.
Insufficient heat input.
9-12. Troubleshooting − Incomplete Fusion
Possible Causes
Workpiece dirty.
Insufficient heat input.
Improper welding technique.
9-13. Troubleshooting − Burn-Through
Possible Causes
Excessive heat input.
9-14. Troubleshooting − Waviness Of Bead
Possible Causes
Welding wire extends too far out of nozzle.
Unsteady hand.
OM-923 Page 34
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.
Select higher wire feed speed and/or select higher voltage range.
Reduce travel speed.
Incomplete Fusion − failure of weld metal to fuse completely with
base metal or a preceeding weld bead.
Remove all grease, oil, moisture, rust, paint, undercoating, and dirt from work surface before
welding.
Select higher voltage range and/or adjust wire feed speed.
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.
Burn-Through − weld metal melting completely through base metal
resulting in holes where no metal remains.
Select lower voltage range and reduce wire feed speed.
Increase and/or maintain steady travel speed.
Waviness Of Bead − weld metal that is not parallel and does not cover
joint formed by base metal.
Be sure welding wire extends not more than 1/2 in. (13 mm) beyond nozzle.
Support hand on solid surface or use two hands.
Corrective Actions
Corrective Actions
Corrective Actions
Corrective Actions
S-0637
S-0640
S-0641