BANDSAW OPERATIONS - OD1646 - LESSON 2/TASK 2
drive belts, can be found in TM 9-3419-228-10, on pages 21 through 25. This
TM should always be referred to when actual repair or troubleshooting
procedures are performed.
a.
Troubleshooting the Malfunction: MACHINE WILL NOT START.
When the
model 2612-1M bandsaw machine will not start, three conditions could-be
causing the problem.
To locate the source of the trouble, make these
checks.
(1) First, check the main fuses and the control circuit fuse. Replace
any fuse that is defective. If a fuse is replaced, try to start the machine
to see if the problem is still present.
(2) If all the fuses are good but the machine will still not start,
check the reset on the band drive motor starter (if a starter is used).
Starting and stopping the machine a number of times in quick succession, or
an overload, will trip the starter heater.
After locating and correcting
the trouble, push in the reset button.
(3) If the machine will still not start, check the transformer. Replace
the transformer if necessary. Test operate to ensure that the problem has
been eliminated.
b.
Troubleshooting the Malfunction: MACHINE VIBRATION. Machine vibration
may be the result of the presence of either of two conditions.
(1) The band wheels may have become unbalanced.
Check to see if the
band wheels are balanced.
(2) If the band wheels are balanced, and vibration is still present, it
is possible that the drive belts may have been replaced by belts which are
unbalanced.
Balance the drive belts, as required, then test operate to
ensure that the malfunction no longer exists.
c.
Troubleshooting the Malfunction: SAW BAND VIBRATION DURING SAWING.
When saw band vibration occurs during sawing operations, make these checks:
(1) Check the band speed and the feed force. Saw band vibration can be
caused by the selection of the incorrect band speed or by the incorrect feed
pressure. Make adjustments as needed to correct the problem.
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