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Rexroth IndraDyn A
Maintaining Holding Brakes
Before initial startup
During operation
DOK-MOTOR*-MAD/MAF****-PR03-EN-P
In order to ensure proper functioning of the holding brake, it must be
checked before the motor is installed.
Measure the holding torque of the brake; grind in the holding brake, if
necessary.
Proceed as follows:
1. De-energize the motor and secure it against re-energization.
2. Measure the transmittable holding torque of the holding brake using a
torque wrench. The holding torque of the brakes is specified in the
data sheets.
3. If the holding torque specified in the data sheets is attained, the
holding brake is ready for operation.
If the holding torque specified in the data sheets is not attained, the
holding brake must be ground in as described in step 4.
4. Grinding in:
Recommendation for grinding in
Interval
Grinding-in speed
Program
Ambient temperature
Fig. 12-3:
Recommended procedure for grinding in motor holding brakes
⇒ If the holding torque specified in the data sheets is attained, the
holding brake is ready for operation.
⇒ If the holding torque specified in the data sheets is not attained,
repeat step 4 (grinding-in process).
⇒ If the specified holding torque is not attained after the second
grinding-in process, the holding brake is not operable. Notify Bosch
Rexroth Service.
If holding brakes are required only sporadically (braking cycle >48 h)
during operation, film rust may develop on the brake friction surface.
To prevent the holding torque from dropping below the specified holding
torque, we recommend the grinding procedure described below:
Recommendation for grinding in
Interval
Grinding-in speed
Number of grinding-in revolutions
Ambient temperature
Fig. 12-4:
Recommended procedure for grinding in motor holding brakes
Note:
The option of automatically implementing the grinding-in
routine in the program run is described in the documentation
of the particular drive controllers.
During normal operation, it is not necessary to grind in the brake.
It is sufficient if the brake is activated twice a day by removing the
controller enable signal.
Operating IndraDyn A Motors
1x
100 rpm / 30s duration
500ms, clocked
-20°C to +50°C
Once in 48 h
100 rpm
1
-20°C to +50°C
12-5
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