BANDSAW OPERATIONS - OD1646 - LESSON 2/TASK 2
(2) If all the fuses are operational, but the machine will 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. If the heater relay has been set for
automatic operation, it will not be necessary to push the reset button, but
will only be necessary to wait for the relay to cool. Then try starting the
machine to see if the malfunction is still present.
(3) If the malfunction is still present, check the transformer, and
replace it, if necessary. Test operate to ensure that the problem has been
fixed.
b.
Troubleshooting the Malfunction: SEVERE MACHINE
VIBRATION.
Three
conditions could cause severe machine vibration.
(1) If the band wheels are not balanced, machine vibration could result.
Check to see if the band wheels are balanced.
(2) If the band wheels are balanced, and vibration is still present,
check to see if the variable pulley components are balanced. If they are
not balanced, vibrations could result.
Balance the components of the
variable pulley, if needed.
Then test operate to see if the trouble has
been fixed.
(3) If severe machine vibration is still present, check to see whether
the variable drive belts are unbalanced.
Balance the drive belts, if
required, then test operate to ensure that the malfunction is no longer
present.
(4) Severe machine vibration can result if the bandsaw machine is not
resting evenly on the floor.
To correct this condition, refer to the
alignment procedure in TM 9-3405-210-14&P, page 1.
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.
Saw band vibration can be caused by the
selection of the incorrect
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