Miller Bobcat 250 Owner's Manual page 65

12-4. Positioning Electrode Holder
Groove Welds
1
1
90
90
1
1
Fillet Welds
45
45
1
1
45
45
12-5. Poor Weld Bead Characteristics
12-6. Good Weld Bead Characteristics
10 -30
10 -30
90
90
2
2
10 -30
10 -30
3
3
2
1
1
2
2
3
1
1
2
2
2
2
2
3 4
3 4
5
5
4
3
4
5
5
1 End View Of Work Angle
2 Side View Of Electrode Angle
After learning to start and hold an arc, prac-
tice running beads of weld metal on flat
plates using a full electrode.
Hold the electrode nearly perpendicular to
the work, although tilting it ahead (in the di-
rection of travel) will be helpful.
�
To produce the best results, hold a
short arc, travel at a uniform speed,
and feed the electrode downward at a
constant rate as it melts.
1 Large Spatter Deposits
2 Rough, Uneven Bead
3 Slight Crater During Welding
4 Bad Overlap
5 Poor Penetration
1 Fine Spatter
2 Uniform Bead
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 Metal
OM-249336 Page 61
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