Operating manual
cyber
®
dynamic system
en-32
Doc. no.: 5022-D056658
Revision: 01
The holding brake is not a safety brake (compare DIN EN 13849-1 or leaflet on vertical axles
from SMBG, the South German Wood and Metal Trade Association), and is not suitable for
personal protection or as a service brake.
Emergency stop
The effective braking torques of a holding brake differ due to physical factors, and it is necessary
to consider use during a malfunction as well as normal operation:
-
In normal use, the operating principle when using the holding brake to clamp / secure an axle in
standstill is a static friction with the friction coefficient µ
H
. This means the
“static holding torque”
M
4
as specified in the specification sheets is reached.
-
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 mass 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.
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.
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.).
If no data is available for your drive system regarding the run-in process, we recommend that you
use the following data for the run-in process.
Within 24 h
of the first startup
, grind in the brake as follows:
-
In an applied state
-
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 drive system and
for a defined number of runs) and then release it again.
-
Or, drive the drive system 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.
