Miller MTL-20 Torches Посібник користувача - Сторінка 10

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SECTION
4-
MAINTENANCE & TROUBLESHOOTING
Iz$~J ~
READ
SAFETY BLOCKS
at
beginning
of manual before
proceeding.
Table
4-1.
Troubleshooting
N
OT
E
~
Before
using
trouble
shooting
table,
check selection and
preparation
of
tungsten
electrode
according
to
Section
5.
Trouble
Remedy
Lack of
high frequency: difficulty
in
establishing
-~
Check
cables and torch for cracks
or
bad connections. Be
sure
that torch cables
arc.
are
not
close
to
any
grounded
metal.
Repair
or
replace
necessary
parts.
Check
welding
power
source
high frequency
control,
and if necessary, check
and
adjust spark
gaps.
Wandering
arc
poor control of direction of
arc.
...~
Reduce
gas flow
rate
according
to
welding
power
source
Owners
Manual.
Tungsten
electrode
oxidizing
and
not
remaining
bright
after conclusion of weld.
Shield weld
zone
from drafts. Check and
tighten
all gas
fittings.
Increase
postflow
time
according
to
welding
power
source
Owners
Manual.
Check gas
valve.
Torch
and/or
power
cable/coolant-out
hose
-~
Check
cooling
system
operation.
Make
sure
coolant hoses
are
clear of obstruc
overheats.
tions and
are
not
pinched.
Turn Off all power before
maintaining.
Coolant Hose
(Also Keep
Hose
Clean)
Torch Cable
Figure
4-1.
Maintenance Schedule
OM-1568
Page
6