Filter
Top Products
7 - 43
MDS-D2/DH2 Series Instruction Manual
7.3 Troubleshooting
[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.