Bearings; Braking Concepts - Siemens SIMOTICS T-1FW6 Configuration Manual

Motor components and options
5.1 Motor components
5.1.4

Bearings

Selecting the bearing
1FW6 torque motors are built-in motors for directly driven rotary or swivel axes. To set up a
complete drive unit, a bearing between the stator and rotor is required in addition to the phase-
angle encoder system.
Your choice of bearing is governed by the following factors:
• Geometric requirements (internal and external diameter)
• Speed
• Load (magnitude, direction)
• Rigidity (accuracy, pretension)
• Service life
The bearing is not included in the scope of supply.
Bearing currents and static charging of the rotor
Depending on the design and properties of the bearing, the rotor may become statically
charged!
• Apply the corresponding remedial measures, e.g. insulated bearings or the appropriate
Note
Radial forces are generated between the stator and rotor. These must be taken into account
when you select the bearing, see also the Chapter "Forces that occur between the stator and
rotor (Page 116)".
5.1.5

Braking concepts

Uncontrolled coast down of the drive as a result of malfunctions
Malfunctions on a rotating machine axes can lead to the drive coasting to a stop in an
uncontrolled manner.
• Take the appropriate measures to brake the drive with its maximum possible kinetic energy
88
WARNING
grounding.
WARNING
in the event of a fault.
1FW6 Built-in torque motors
Configuration Manual, 09/2022, A5E52220645B AA