Startup and operation
cyber
®
dynamic line
en-18
5022-D029179
Revision: 04
6.2 Holding brake
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- In the case of a malfunction, the operating principle when using the holding brake to shut
down a moving axle (emergency stop) is a dynamic friction with the friction coefficient µ
G
. This
means the "dynamic braking torque" is reached. The dynamic braking torque is lower than the
static holding torque M
4
.
Observe the design of the axle to ascertain if the holding brake may be used for an
emergency stop:
- The maximum occurring load torque,
- The maximum distance available,
- The moment of inertia of the entire axle, and
- The maximum energy in the entire axle.
Otherwise the delay effect of the brake may not be enough to stop the axle.
6.2.2 Running in the holding brake
The holding brake may no longer reach the specified holding torque M
4
due to the effects of
storage, conditions or type of use, overvoltage or high temperature, combined with ambient
conditions (soiling, humidity, etc.).
Use of the following data is recommended if no data is available for the motor regarding the run-in
process:
Within 24 h
of the first startup
, grind in the brake as follows:
- The brake is applied
- At a speed of 100 min
-1
- Once for 5 revolutions
- Ambient temperature between 0 °C and +40 °C
Grind in the brake
after startup
as follows:
- Apply and release every 500 ms
- At a speed of 100 min
-1
- For a duration of 30 s
- Ambient temperature between 0 °C and +40 °C
To restore the holding power, perform the following run-in procedure:
- Apply the brake briefly for a defined time (at the specified speed of the motor and for a
defined number of runs) and then release it again.
- Or, drive the motor against the applied brake for a defined number of revolutions at a
specified speed.
For additional information and for correct data on the grinding-in process, contact our Sales
department. Always state the serial number (SN) when doing so.
6.2.3 Commissioning the holding brake
To make sure the holding brake is functioning, it has to be tested during startup.
If the regulating device has a function for integrated testing of the holding torque during secure
limited movement and secure limited speed, then use this function and observe the
instructions from the regulating device's manufacturer.
If no such function is present, we recommend that the user proceeds as follows:
Limit the permitted range of movement and the maximum speed using the parameters in the
regulating device so that no danger to persons or property can arise from movement of the
axle.
The holding brake may become worn if used for emergency stop.
For this reason, it is recommended that the required holding torque for
the axle is at most 60% of the static holding torque M4 of the holding
brake used.
Summary of Contents for cyber dynamic 17
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