MDS-E/EH Series Instruction Manual
7 Troubleshooting
421
IB-1501229-F
[6] The rotation does not stabilize.
[7] The speed does not rise above the command speed sometimes.
Investigation item
Investigation results
Remedies
1
Check the spindle parameter SP005 (SP008)
settings.
The rotation stabilizes when the settings
values are both set to approx. double.
Change the setting value.
Note that the gear noise may increase.
The symptoms do not change even when
the above value is set.
Return the setting values to the original
values.
Check the investigation item No. 2.
2
Manually shake the speed encoder connectors
(spindle drive unit side and speed encoder
side) to check if they are disconnected.
The connector is disconnected (or loose).
Correctly connect the connector.
The connector is not disconnected (or
loose).
Check the investigation item No. 3.
3
Turn the power OFF, and check the connection
of the speed encoder cable with a tester.
(Especially check the shield wiring.)
The connection is faulty.
Replace the encoder cable.
Correct the connection.
The connection is normal.
Check the investigation item No. 4.
4
Investigate the wiring and installation
environment.
1) Is the ground correctly connected?
2) Are there any noise-generating devices near
the drive unit?
1) The grounding is incomplete.
Correctly ground.
2) The alarm occurs easily when a specific
device operates.
Use noise measures on the device
described on the left.
No particular problems found.
Replace the spindle drive unit.
Investigation item
Investigation results
Remedies
1
Check the speed command.
Check whether the override input is input from
the machine operation panel.
The speed command is not input correctly.
Input the correct speed command.
The speed command is input correctly.
Check the investigation item No. 2.
2
Check whether the load has suddenly become
heavier.
The load has become heavier.
Repair the machine side.
No particular problems found.
Check the investigation item No. 3.
3
Manually rotate the motor bearings and check
the movement.
The bearings do not rotate smoothly.
Replace the spindle motor.
The bearings rotate smoothly.
Check the investigation item No. 4.
4
Manually shake the speed encoder connectors
(spindle drive unit side and speed encoder
side) to check if they are disconnected.
The connector is disconnected (or loose).
Correctly connect the connector.
The connector is not disconnected (or
loose).
Check the investigation item No. 5.
5
Turn the power OFF, and check the connection
of the speed encoder cable with a tester.
(Especially check the shield wiring.)
The connection is faulty.
Replace the encoder cable.
Correct the connection.
The waveform is normal.
Replace the spindle drive unit.
Summary of Contents for MDS-E
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Page 32: ...1 IB 1501229 F 1 Installation ...
Page 76: ...45 IB 1501229 F 2 Wiring and Connection ...
Page 132: ...101 IB 1501229 F 3 Safety Function ...
Page 142: ...111 IB 1501229 F 4 Setup ...
Page 277: ...MDS E EH Series Instruction Manual 4 Setup 246 IB 1501229 F ...
Page 278: ...247 IB 1501229 F 5 Servo Adjustment ...
Page 351: ...MDS E EH Series Instruction Manual 5 Servo Adjustment 320 IB 1501229 F ...
Page 352: ...321 IB 1501229 F 6 Spindle Adjustment ...
Page 404: ...373 IB 1501229 F 7 Troubleshooting ...
Page 455: ...MDS E EH Series Instruction Manual 7 Troubleshooting 424 IB 1501229 F ...
Page 456: ...425 IB 1501229 F 8 Maintenance ...
Page 475: ...MDS E EH Series Instruction Manual 8 Maintenance 444 IB 1501229 F ...
Page 476: ...445 IB 1501229 F 9 Power Backup System ...
Page 494: ...463 IB 1501229 F 10 Appx 1 Cable and Connector Assembly ...
Page 504: ...473 IB 1501229 F 11 Appx 2 D A Output Specifications for Drive Unit ...
Page 514: ...483 IB 1501229 F 12 Appx 3 Protection Function ...
Page 523: ...MDS E EH Series Instruction Manual 12 Appx 3 Protection Function 492 IB 1501229 F ...
Page 524: ...493 IB 1501229 F 13 Appx 4 Compliance to EC Directives ...
Page 528: ...497 IB 1501229 F 14 Appx 5 EMC Installation Guidelines ...
Page 540: ...509 IB 1501229 F 15 Appx 6 Higher Harmonic Suppression Measure Guidelines ...
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