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SECTION
4
MAINTENANCE & TROUBLESHOOTING
NOTE ~
Before
using troubleshooting
table,
check selection
and
preparation
of
tungsten
_____________________
electrode
according
to
Section
5.
Trouble
Remedy
Wandering
arc
poor control of direction of
arc.
~
-
Reduce gas flow
rate.
I
Tungsten
electrode
oxidizing
and
not
remaining
I.
~
Shield weld
zone
from drafts. Check and
tighten
all gas
fittings.
bright
after conclusion of weld.
I
_________________________________________________________________
Increase
postflow
time
(see Figure 3-3).
OM-171 108
Page
5
1
Trigger
Press
tngger
to
pull
in contactor
and start gas flow. While
trigger
is
pressed,
use scratch
start
method
to start
an arc.
To
extinguish
arc,
md
for proper
posthow
and
cooling, momentarily
release and repress
trigger
for
aboUt
ten
seconds.
ST-800
877
Figure
3-3.
Operation
Figure
4-1.
Maintenance Schedule
Table
4-1.
Troubleshooting
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