Holding And Positioning Welding Gun; Conditions That Affect Weld Bead Shape - Miller Millermatic 212 Auto-Set Owner's Manual

9-3. Holding And Positioning Welding Gun

5
° °
90 90
End View of Work Angle
Groove Welds

9-4. Conditions That Affect Weld Bead Shape

10
Short
Electrode Extensions (Stickout)
1
2
4
° °
0 -15
Side View of Gun Angle
°
Push
Gun Angles And Weld Bead Profiles
Normal Long
Slow
Gun Travel Speed
3
°
45
°
45
End View of Work Angle
Perpendicular
Short
Fillet Weld Electode Extensions (Stickout)
Normal Fast
.
Welding wire is energized when
gun trigger is pressed. Before
lowering helmet and pressing trig-
ger, be sure wire is no more than
1/2 in. (13 mm) past end of nozzle,
and tip of wire is positioned cor-
rectly on seam.
1 Hold Gun and Control Gun
Trigger
2 Workpiece
3 Work Clamp
4 Electrode Extension (Stickout)
Solid Wire − 3/8 to 1/2 in.
(9 to 13 mm)
5 Cradle Gun and Rest Hand on
Workpiece
° °
0 -15
Side View of Gun Angle
Fillet Welds
S-0421-A
.
Weld bead shape depends
on gun angle, direction of
travel, electrode extension
(stickout), travel
thickness of base metal, wire
feed speed (weld current),
°
10
and voltage.
Drag
Normal Long
OM-238118 Page 33
speed,
S-0634