BANDSAW OPERATIONS - OD1646 - LESSON 2/TASK 2
a.
Identifying the Symptom.
The identification
of the symptom of a
malfunction in one of the three models of bandsaw
machines is merely a
descriptive statement of what is going wrong during
an attempt to operate
the machine.
Examples might be: TRANSMISSION WILL
NOT STAY IN GEAR or
SURFACE FINISH ON WORK TOO ROUGH.
b.
Isolating the Fault. Once the symptom has been accurately described,
it is necessary to isolate the cause of the problem.
This is done by
performing steps in a logical sequence as described in the appropriate
technical manual (TM).
These fault isolation steps are organized so that
the most frequent or obvious possibilities are checked first and the rarer
causes of the malfunction symptom are performed last, if the cause of the
malfunction has still not been found.
c.
Correcting the Fault.
The fault isolation steps listed in the
appropriate TM for any given symptom should be performed only up to the
point where a fault is found. The component causing the problem should then
be checked, adjusted, or replaced, and the bandsaw machine test operated to
ensure that the problem has been fixed. If the problem still exists, fault
isolation using the troubleshooting list should continue until test
operation proves that the fault has been corrected.
Usually, when
troubleshooting the bandsaw machine models discussed in this subcourse, the
fault remedy is self-evident.
For example, if the fault isolation list
requires that the transformer be checked, and the transformer is found to be
bad, then the transformer should be replaced. Following replacement, test
operation should be performed to confirm that the malfunction no longer
exists.
NOTE
The
of
this
task
is
to
describe
troubleshooting procedures, i.e., the isolation of the
causes of specific malfunctions in bandsaw machines.
Since the corrective procedures for most of the
problems are self-evident, they will not be discussed
in detail in this subcourse.
When performing actual
troubleshooting, always have the appropriate TM
available, and follow the procedures described there.
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