Miller STi 270, Owner'S Manual

Page: 32 / 44

OM-263 706 Page 28
10-4. Positioning Electrode Holder
S-0060
90
°
90
°
10
°
-30
°
45
°
45
° 10
°
-30
°
1 End View Of Work Angle
2 Side View Of Electrode
Angle
After learning to start and hold
an arc, practice running beads
of weld metal on flat plates using
a full electrode.
Hold the electrode nearly per-
pendicular to the work, although
tilting it ahead (in the direction 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
1
2
2
Groove Welds
Fillet Welds
10-5. Poor Weld Bead Characteristics
S-0053-A
1 Large Spatter Deposits
2 Rough, Uneven Bead
3 Slight Crater During Welding
4 Bad Overlap
5 Poor Penetration
5
4
2
3
1
10-6. Good Weld Bead Characteristics
S-0052-B
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
1
5 2 3 4