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MBT Synchronous Torque Motors
11
Troubleshooting
11.1
Procedure
Malfunction
Motor does not run
Vibrations
Running noise
High motor temperatures
Motor temperature monitor‐
ing is activated
Wrong or defective tempera‐
ture display
Possible causes for failures of MBT motors can be restricted to the following
areas:
●
Motor cooling circuit and temperature curve
●
Internal temperature sensor
●
Mechanical damage of the motor
●
Mechanical connection to machine
Encoder and temperature sensor are controlled by the controller or the con‐
trol unit; corresponding diagnostic messages are displayed. Comply with the
instructions in the corresponding documentation.
The sections below describe examples of some fault states along with possi‐
ble causes. This list is not exhaustive.
Error cause
Controller enable signal missing
Controller fault
Voltage supply missing
Brake is not released
Coupling elements or attachments
are poorly balanced
Adjustment of shaft end attach‐
ments (coupling, gearbox, ...) is in‐
sufficient
Mounting screws loose
Foreign bodies within the motor
Bearing is damaged
Operation outside of rated data
Heat dissipation is impaired
Temperature sensor not connected Connect temperature sensor
Temperature sensor defective
Tab. 11-1:
Malfunctions on MBT motors
In the case of malfunctions or troubleshooting, please observe the
notes in the project planning manual, too. Contact the manufac‐
turer, if necessary.
Measures
Activate controller enable signal
Troubleshoot acc. to documentation of controller
Control voltage supply
Check the brake activation
Re-balance
Re-align the attachments
Lock screw connections acc. to specifications
Stop the motor --> repair by manufacturer
Stop the motor --> repair by manufacturer
Reduce load and check the dimensioning
Clean the motor
For liquid cooling, check cooling circuit.
Stop the motor --> repair by manufacturer
R911336703_Edition 03 Bosch Rexroth AG
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Troubleshooting
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