MDS-C1-SPA Series INSTRUCTION MANUALib1500152(eng)a.pdf - 第194页
5. Troubleshooting 5 - 23 [3] The rotation speed command and actual rotation speed do not match. Investigation item Investigation results Remedies The speed command is not input correctly. Input the correct speed command…
5. Troubleshooting
5 - 22
5-3-4 Troubleshooting the spindle system when there is no alarm or warning
If an abnormality is observed in the spindle system but no alarm or warning has occurred, refer to the
following table and check the state.
[1] No abnormality is displayed, but the motor does not rotate.
Investigation item Investigation results Remedies
The wiring is incorrect, the screws are
loose, or the cables are disconnected.
Correctly wire. Correctly tighten the
screws. Replace the cables.
1
Check the wiring around the spindle drive
unit.
Also check for loosening in the terminal
screws and disconnec- tions, etc.
No particular problems found.
Investigate investigation item 2 and
remedy.
The voltage is exceeding the
specification value.
Restore the power to the correct state.
2 Check the input voltage.
The voltage is within the specification
value.
Investigate investigation item 3 and
remedy.
The correct values are not set. Set the correct values.
3 Check all of the spindle parameters.
The correct values are set.
Investigate investigation item 4 and
remedy.
The signals are not input or the
sequence is incorrect.
The orientation command is input.
Correct the input signals.
4
Check the input signals.
• Are the READY, forward run and
reverse run signals input?
• In particular, the forward run and
reverse run signals must be input at
least one second after READY is
turned ON.
• Check whether the forward run and
reverse run signals are turned ON
simultaneously.
No particular problems found.
Investigate investigation item 5 and
remedy.
The speed command is not input
correctly.
Input the correct speed command.
5 Check the speed command.
The speed command is input correctly. Replace the unit.
[2] No fault is displayed, but the motor only rotates slowly, or a large noise is heard from the
motor.
Investigation item Investigation results Remedies
The wires are not connected correctly. Correctly connect.
1
Check the U, V and W wiring between the
spindle drive unit and motor.
The wires are connected correctly.
Investigate investigation item 2 and
remedy.
2 Check the input voltage.
One of the three phases is not within the
specification value.
No particular problems found.
Restore the power to the correct state.
Investigate investigation item 3 and
remedy.
The speed command is not input
correctly.
Check the NC and PLC sequence.
3 Check the speed command.
The speed command is input correctly.
Investigate investigation item 4 and
remedy.
The connector is disconnected (or
loose).
Correctly connect the connector.
4
Tug on the connector by hand to check
whether the speed detector connector
(drive unit side and speed detector side)
is loose.
The connector is not disconnected (or
loose).
Investigate investigation item 5 and
remedy.
The connection is faulty or disconnected.
Replace the detector cable.
Correct the connection.
5
Turn the power OFF, and check the
connection of the speed detector cable
with a tester.
The connection is normal. Replace the drive unit.
5. Troubleshooting
5 - 23
[3] The rotation speed command and actual rotation speed do not match.
Investigation item Investigation results Remedies
The speed command is not input
correctly.
Input the correct speed command.
1 Check the speed command.
The speed command is correct.
Investigate investigation item 2 and
remedy.
There is slipping. Repair the machine side.
2
Check whether there is slipping between
the motor and spindle. (When connected
with a belt or clutch.)
No particular problems found.
Investigate investigation item 3 and
remedy.
The correct values are not set. Set the correct values.
3
Check the spindle parameters (SP017,
SP034, SP040, SP155 to SP170, SP257
and following).
The correct values are set. Replace the drive unit.
[4] The starting time is long or has increased in length.
Investigation item Investigation results Remedies
The friction torque has increased. Repair the machine side.
1
Check whether the friction torque has
increased.
No particular problems found.
Investigate investigation item 2 and
remedy.
The bearings do not rotate smoothly. Replace the spindle motor.
2
Manually rotate the motor bearings and
check the movement.
The bearings rotate smoothly.
Investigate investigation item 3 and
remedy.
The signal has been input. Do not input this signal.
3
Check whether the torque limit signal has
been input.
The signal is not input. Replace the drive unit.
[5] The motor stops during cutting.
Investigation item Investigation results Remedies
The load meter sways past 120%
during cutting.
Reduce the load.
1 Check the load rate during cutting.
No particular problems found.
Investigate the same matters as item
(4), and remedy.
[6] The vibration and noise (gear noise), etc., are large.
Investigation item Investigation results Remedies
The same noise is heard during
coasting.
Repair the machine side.
1
Check the machine's dynamic balance.
(Coast from the maximum speed.)
No particular problems found.
Investigate investigation item 2 and
remedy.
Vibration and noise increase at a set
rotation speed during coasting.
Repair the machine side.
2
Check whether there is a resonance
point in the machine. (Coast from the
maximum speed.)
No particular problems found.
Investigate investigation item 3 and
remedy.
The backlash is great. Repair the machine side.
3 Check the machine's backlash.
No particular problems found.
Investigate investigation item 4 and
remedy.
Symptoms decrease when setting value
is set to approx. half.
Change the setting value.
Note that the impact response will
drop.
4
Check the spindle parameter settings.
(SP022, SP023, SP056)
The symptoms do not change even
when the above value is set.
Return the setting values to the
original values.
Investigate investigation item 5 and
remedy.
The connector is disconnected (or
loose).
Correctly connect the connector.
5
Tug on the connector by hand to check
whether the speed detector connector
(spindle drive unit side and speed
detector side) is loose.
The connector is not disconnected (or
loose).
Investigate investigation item 6 and
remedy.
The connection is faulty or
disconnected.
Replace the detector cable.
Correct the connection.
6
Turn the power OFF, and check the
connection of the speed detector cable
with a tester.
The connection is normal. Replace the drive unit.
5. Troubleshooting
5 - 24
[7] The spindle coasts during deceleration.
Investigation item Investigation results Remedies
There is slipping. Repair the machine side.
1
Check whether there is slipping between
the motor and spindle. (When connected
with a belt or clutch.)
No particular problems found. Replace the drive unit.
[8] The rotation does not stabilize.
Investigation item Investigation results Remedies
The rotation stabilizes when the settings
values are both set to approx. double.
Change the setting value.
Note that the gear noise may
increase.
1
Check the spindle parameter settings.
(SP022, SP023)
The symptoms do not change even
when the above value is set.
Return the setting values to the
original values.
Investigate investigation item 2 and
remedy.
The connector is disconnected (or
loose).
Correctly connect the connector.
2
Tug on the connector by hand to check
whether the speed detector connector
(spindle drive unit side and speed
detector side) is loose.
The connector is not disconnected (or
loose).
Investigate investigation item 3 and
remedy.
The connection is faulty or
disconnected.
Replace the detector cable.
Correct the connection.
3
Turn the power OFF, and check the
connection of the speed detector cable
with a tester.
(Especially check the shield wiring.)
The connection is normal.
Investigate investigation item 4 and
remedy.
The grounding is incomplete. Correctly ground.
The alarm occurs easily when a specific
device operates.
Use noise measures on the device
described on the left.
4
Investigate the wiring and installation
environment.
• Is the ground correctly connected?
• Are there any noise-generating devices
near the drive unit?
No particular problems found. Replace the drive unit.
[9] The speed does not rise above a set lev el.
Investigation item Investigation results Remedies
The speed command is not input
correctly.
Input the correct speed command.
1
Check the speed command.
Check whether the override input is input
from the machine operation panel.
The speed command is input correctly.
Investigate investigation item 2 and
remedy.
The load has become heavier. Repair the machine side.
2
Check whether the load has suddenly
become heavier.
No particular problems found.
Investigate investigation item 3 and
remedy.
The bearings do not rotate smoothly. Replace the spindle motor.
3
Manually rotate the motor bearings and
check the movement.
The bearings rotate smoothly.
Investigate investigation item 4 and
remedy.
The connector is disconnected (or
loose).
Correctly connect the connector.
4
Tug on the connector by hand to check
whether the speed detector connector
(spindle drive unit side and speed
detector side) is loose.
The connector is not disconnected (or
loose).
Investigate investigation item 5 and
remedy.
The connection is faulty or
disconnected.
Replace the detector cable.
Correct the connection.
5
Turn the power OFF, and check the
connection of the speed detector cable
with a tester.
(Especially check the shield wiring.)
The waveform is normal. Replace the spindle drive unit.