Siemens SIMOTICS T-1FW6 Configuration Manual page 116

Configuration
6.4 Installation
Risk of rotor permanent magnets causing crushing injuries
The forces of attraction of magnetic rotors act on materials that can be magnetized. The forces
of attraction increase significantly close to the rotor. The response threshold of 3 mT for risk of
injury through attraction and causing a projectile effect is reached at a distance of 100 mm
(Directive 2013/35/EU). Rotors and materials that can be magnetized can suddenly slam
together unintentionally. Two rotors can also unintentionally slam together.
There is a significant risk of crushing when you are close to a rotor.
Close to the motor, the magnetic forces of attraction can be up to several kN. – Example:
Magnetic attractive forces are equivalent to a force of 100 kg, which is sufficient to trap a body
part.
• Do not underestimate the strength of the attractive forces, and work very carefully.
• Wear safety gloves.
• The work should be done by at least two people.
• Do not unpack the rotor until immediately before assembly.
• Never unpack several rotors at once.
• Never place the rotors directly next to one another without providing adequate protection.
• Never carry any objects made of magnetizable materials (for example watches, steel or iron
• Immediately install the rotor after it has been unpacked.
• Use a special installation device when centering and assembling the stator and rotor as
• Keep the following tools at hand to release parts of the body (hand, fingers, foot etc.)
NOTICE
Destruction of the motor
If you fix the rotor and/or stator at both ends, this can result in significant material deformation
in the machine assembly due to thermal expansion, which could destroy the motor. Further, if
the stator is mounted at both ends, high mechanical loads can be transmitted through the
stator, which could destroy the motor.
• The machine must be designed in such a way that both the rotor and the stator are each
114
WARNING
tools) and/or permanent magnets close to the rotor! If tools that can be magnetized are still
required, then hold any tool firmly using both hands. Slowly bring the tool to the rotor.
individual components. Maintain the special procedure.
trapped between two components:
– A hammer (about 3 kg) made of solid, non-magnetizable material
– Two pointed wedges (wedge angle approx. 10° - 15°, minimum height 50 mm) made of
solid, non-magnetizable material (e.g. hard wood)
secured on one side only. See Chapter "Installation examples".
1FW6 Built-in torque motors
Configuration Manual, 09/2022, A5E52220645B AA