OPERA
TING INSTR
UCTIONS
34
MIG 140 INVERTER WELDER 058-9305-6
3. Vertical position: The torch can be easily
moved from top to bottom in this
position, though it is difficult to prevent
the puddle from running downward.
Moving the torch from bottom to top
provides better puddle control and
allows slower rate of travel to achieve
deeper penetration. For this position,
angle B should be zero and angle A will
vary from 45 to 60 degrees
(fig d)
.
4. Overhead position: This is the most
difficult welding position. For this
position, angle A should be maintained
at 60 degrees
.
Maintaining this angle
will reduce falling of molten metal into
the nozzle
(fig e)
.
Angle B should be zero so that the wire
is aiming directly into the weld joint. If
excessive dripping of the weld puddle
occurs, select a lower heat setting.
Stick welding operation
Selection of electrode
1. Select the appropriate type of electrode
and the amount of heat required for the
welding process.
2. Set higher amperage for thick and heavy
metals.
3. Try the intended weld on scrap metal to
ensure the proper determination of the
type of electrode and the amperage.
fig d
MC-589305-33
fig e
MC-589305-34