Options; Round Sealing Ring (O Ring) - Siemens SIMOTICS T-1FW6 Configuration Manual

Motor components and options
5.2 Options
Deploying a holding brake
Due to cogging torques, torque motors can be pulled into a preferable magnetic operating
position if the motor is no longer supplied with power from the drive. If the drive is already at a
standstill, this can cause unexpected movements in up to a half magnetic pole pitch in both
directions. To prevent possible damage to the workpiece and/or tool, it may be advisable to use
a holding brake.
Uncontrolled rotation for inclined and horizontal axes
Torque motors are not self clamping. For inclined and horizontal axes in the no current state,
if the center of gravity lies outside the axis of rotation and there is no weight equalization, then
load can move downwards in an uncontrolled fashion. This can result in injury and material
damage.
• Use a holding brake for inclined and horizontal axes that are not equipped with weight
A holding brake may also be required if:
• The bearing friction does not compensate or exceed the cogging torques and unexpected
movements result.
• Unexpected movements of the drive can lead to damage (e.g. a motor with a large mass can
also generate a high level of kinetic energy).
• drives with a weight load must be shut down and de-energized in any position.
To prevent movements when the drive is switched on or off, the holding brake response must
be synchronized with the drive.
During commissioning, refer to the documentation for the drive system being used.
5.2

Options

5.2.1

Round sealing ring (O ring)

90
WARNING
equalization.
1FW6 Built-in torque motors
Configuration Manual, 09/2022, A5E52220645B AA