Gun Movement During Welding; Poor Weld Bead Characteristics; Good Weld Bead Characteristics - Miller Electric Bobcat 250 Owner's Manual

15-4. Gun Movement During Welding

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Normally, a single stringer bead is satisfactory for most narrow groove weld joints; however, for wide groove weld joints or bridging across gaps,
a weave bead or multiple stringer beads works better.
1

15-5. Poor Weld Bead Characteristics

15-6. Good Weld Bead Characteristics

2
3
2
3 4
1
2 3 4
1
2
3
Use weave patterns to cover a wide
area in one pass of the electrode.
1
2
1
3
4
5
5
1
2
3
Weld a new bead or layer for each
1/8 in (3.2 mm) thickness in metals
being welded.
4
5
5
Stringer Bead − Steady
Movement Along Seam
Weave Bead − Side To Side
Movement Along Seam
Weave Patterns
S-0054-A
Large Spatter Deposits
Rough, Uneven Bead
Slight Crater During Welding
Bad Overlap
Poor Penetration
S-0053-A
Fine Spatter
Uniform Bead
Moderate Crater During
Welding
No Overlap
Good Penetration into Base
Metal
S-0052-B
OM-4419 Page 65