Bosch MSK030B-0900-NN, Project Planning Manual

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Dynamic design The load torque must be lower than the minimum dynamic torque M
dyn
which
the holding brake can provide. Otherwise the deceleration effect of the hold‐
ing brake is not sufficient to stop the axis.
In order to decelerate a mass in a defined time or over a defined distance,
the mass inertia of the whole system must be additionally taken into account.
Project planning recommendation In order to ensure plant safety, the holding torque required by the application
must be reduced to 60% of the static holding torque (M4) of the holding
brake.
9.10.4 Holding brake - commissioning and maintenance instructions
To ensure the function of the holding brake, the holding brake must be
checked before commissioning the motors. The check and, if necessary, the
loop-in can be carried out "mechanically by hand" or "automatically by soft‐
ware function".
Manual check and loop-in of the
holding brakes
Measure the holding torque (M4) of the holding brake, if necessary loop in
the holding brake.
Measure the holding torque (M4) of the holding brake
1. Disconnect the motor from the power supply and secure it against being
switched on again.
2. Measure the transferable holding torque (M4) of the holding brake with a
torque wrench. Holding torque (M4): see technical data.
When the specified holding torque (M4) is reached, the motor is ready
for installation.
If the specified holding torque (M4) is not reached, the holding torque
can be restored by the subsequent loop-in process.
Looping in the holding brake
1. With the holding brake closed, turn the output shaft approx. 5 turns by
hand, for example with a torque wrench.
2. Measure holding torque (M4).
When the specified holding torque (M4) is reached, the motor is ready
for installation.
If the specified holding torque (M4) is not reached after several loops,
the holding brake is not functional. Please contact the service of
Rexroth.
Check and loop-in of the holding
brakes via software function
Check holding torque (M4) by command Holding system check
P-0-0541, C2100
1. The effectiveness of the holding brake and the open state is checked by
the drive controller by starting the routine "P-0-0541, C2100 command
Holding system check".
If the holding brake is OK, the drive is ready for operation after the rou‐
tine has expired. If the braking torque is too low, the drive control unit
issues a corresponding message.
The brake test can also be carried out cyclically as part of preven‐
tive maintenance.
Restore holding torque (M4) via software function
The following options are available:
DOK-MOTOR*-MSK********-PR12-EN-P Bosch Rexroth AG 223/279
Synchronous Servomotors MSK
Operating conditions and application notes