Eastwood MP200i Instructions Manual page 29

TIG WELDING TROUBLESHOOTING
PROBLEM CAUSE
Insufficient Shielding
Crater in the
End of the Weld
Bead
Not Enough Filler Material
Too Much Heat in Material
Weld Bead is
Base Metal is Absorbing Too Much Heat
Cracking
Incorrect Filler Wire
Insufficient Clamping
Insufficient Tack Welds
Material is
Warping
Too Much Heat in Material
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CORRECTION
Keep the Torch on the base metal while the post flow shielding gas flows to
protect and cool the metal and Tungsten.
Reduce current and add more filler at end of weld. It may also be beneficial to
back step to ensure no crater will form.
Reduce heat and allow more time between passes.
Preheat base metal (consult welding codes for requirements)
Use appropriate filler wire type and diameter for the joint being welded.
Clamp work piece tightly and weld while clamps are in place.
Add more tack welds until rigidity and stiffness is developed.
To reduce heat it is best to spread the welding out around the area. This can be
done by using stitch welding techniques, alternating sides, and/or taking your
time and allowing the pieces to cool between passes.
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