11. Troubleshooting
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(6) There is a lot of vibration and noise (gear sound).
Investigation items
Investigation results
Remedy
The sound is the same during
coasting.
Correct the machine side.
1 Check the machine
dynamic balance.
(Try coasting from
max. speed.)
No particular problem.
Investigate item 2, and carry out the
appropriate measures.
The vibration and noise increase at a
certain speed during coasting.
Correct the machine side.
2 Check whether there
is a resonance point
on the machine side.
(Try coasting from
max. speed.)
No particular problem.
Investigate item 3, and carry out the
appropriate measures.
There is a large backlash.
Correct the machine side.
3 Check for machine
backlash.
No particular problem.
Investigate item 4, and carry out the
appropriate measures.
The noise and vibration decrease if
the values are halved.
Change the setting values. Note that
the impact response will decrease,
so caution is required.
4 Check the spindle
parameter (SP022:
VGNP1, SP023:
VGNI1, and SP056:
PYVR) settings.
The vibration and noise do not
change when the setting values are
changed as above.
Return the setting to the original
value. Investigate item 5, and carry
out the appropriate measures.
Connector came (was coming) loose. Install correctly.
5 Jiggle the speed
detector connector
(spindle drive unit side
and speed detector
side) to see whether it
is coming loose.
Connectors are normal.
Investigate item 6, and carry out the
appropriate measures.
The connection is faulty, or there is a
broken wire.
Replace the detector cable. Correctly
connect the cable.
6 Turn the power OFF,
and check the speed
detector cable
connection with a
tester.
The connection is normal.
Replace the unit.
(7) The spindle coasts during deceleration.
Investigation items
Investigation results
Remedy
There is slippage.
Correct the machine side.
1 Check for slippage
between the motor
and spindle (when
connected by a belt or
clutch).
No particular problem.
Replace the unit.