Miller Blue Star 6000 Manuel du propriétaire télécharger pdf (Page 51)

OM-499 Page 47

11-13. Weld Test

S-0057-B

1 Vise

2 Weld Joint

3 Hammer

Strike weld joint in direction shown.

A good weld bends over but does

not break.

2 To 3 in

1/4 in

2 To 3 in

(51-76 mm)

(6.4 mm)

(51-76 mm)

11-14. Troubleshooting – Porosity

Porosity – small cavities or holes resulting from gas

pockets in weld metal.

Possible Causes Corrective Actions

Arc length too long. Reduce arc length.

Damp electrode. Use dry electrode.

Workpiece dirty. Remove all grease, oil, moisture, rust, paint, coatings, slag, and dirt from work surface before

welding.

11-15. Troubleshooting – Excessive Spatter

Excessive Spatter – scattering of molten metal particles

that cool to solid form near weld bead.

Possible Causes Corrective Actions

Amperage too high for electrode. Decrease amperage or select larger electrode.

Arc length too long or voltage too high. Reduce arc length or voltage.

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Miller Blue Star 6000 Manuel du propriétaire Page 51