9-5. Gun Movement During Welding

NOTE

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

2

3

1Stringer Bead − Steady Movement Along Seam

2Weave Bead − Side To Side Movement Along Seam

3Weave Patterns

Use weave patterns to cover a wide area in one pass of the electrode.

S-0054-A

9-6. Poor Weld Bead Characteristics

 

1

Large Spatter Deposits

1

2

Rough, Uneven Bead

3

Slight Crater During Welding

 

 

4

Bad Overlap

 

5

Poor Penetration

2

3

4

5

S-0053-A

9-7. Good Weld Bead Characteristics

 

 

 

1

Fine Spatter

 

 

 

2

Uniform Bead

 

 

1

3

Moderate Crater During

 

 

 

 

Welding

 

 

 

Weld a new bead or layer for each

 

 

 

1/8 in (3.2 mm) thickness in metals

 

 

 

being welded.

 

 

 

4

No Overlap

 

 

 

5

Good Penetration into Base

2

3

4

 

Metal

 

 

5

S-0052-B

OM-219 316 Page 32

Page 36
Image 36
Miller Electric MW 140 Plus Gun Movement During Welding, Poor Weld Bead Characteristics, Good Weld Bead Characteristics