11. Troubleshooting
11
−
25
(8) The rotation does not stabilize.
Investigation items
Investigation results
Remedy
The rotation stabilizes when both
setting values are raised 2-fold.
Change the setting values. Note that
the gear sound may become louder.
1 Check the spindle
parameter (SP022:
VGNP1, SP023:
VGNI1) setting values.
The rotation does not stabilize when
the values are changed as shown
above.
Return the settings to the original
values. Investigate item 2, and carry
out the appropriate measures.
Connector came (was coming) loose. Install correctly.
2 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 3, and carry out the
appropriate measures.
The connection is faulty, or there is a
broken wire.
Replace the detector cable. Correctly
connect the cable.
3 Turn the power OFF,
and check the speed
detector cable
connection with a
tester. (Especially
check the shield
wiring.)
The connection is normal.
Investigate item 4, and carry out the
appropriate measures.
4 Investigate the wiring
and installation
environment.
1) Are the units
correctly grounded?
1) The grounding is incomplete.
Correctly ground the units.
2) The alarm occurs easily when a
specific device is operated.
Execute noise countermeasures for
the device at the left.
2) Are there any
devices that
produce noise
around the units?
No particular problem.
Replace the spindle drive unit.