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E-6
TROUBLESHOOTING
E-6
SQUARE WAVE TIG 275
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local
Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
TIG WELDING TROUBLE
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENTS(S)
RECOMMENDED
COURSE OF ACTION
Weak High Frequency.
Output quits momentarily; gas flow
and high frequency are also inter-
rupted.
1. Spark gap is too close. Reset
gap per Periodic Maintenance
Section instructions.
2. Work and electrode cables in
poor condition, allowing high fre-
quency to "leak" to ground. Use
good quality cables, preferably
those with a high natural rubber
content, and as short as possi-
ble.
3. No shielding gas. Adjust gas
flow for a flow of 10 to 30 CFH
(4.7 to 14.1 1/min) for most appli-
cations. (High frequency will not
jump from the tungsten to work
without shielding gas).
1. May be caused by high frequen-
cy interference. Is the machine
grounded properly, according to
the installation instructions? Are
there other machines in the area
which may be strong sources of
high frequency? Make sure that
they are also properly installed
and grounded.
2. Some internal ground connec-
tions may have become loose.
Check that the screws which
mount the Control PC Board and
the Bypass Stabilizer PC Board
are tight. Also, all case parts
should be in place, and the case
screws should be tight.
Contact your Local Lincoln Authorized
Field Service Facility for technical
troubleshooting assistance.