Siemens SIMOTICS T-1FW6 Operating Instructions Manual page 114

Commissioning
7.1 Safety instructions for commissioning
NOTICE
Motor destroyed as a result of overheating
The motor may overheat without temperature protection and be destroyed.
• Check whether the temperature protection is effective before switching on the DC link
NOTICE
Demagnetizing the permanent magnets
If, while the torque motor is operational, the rotor exceeds the maximum temperature of
120 °C, then there is a risk that the permanent magnets will be demagnetized.
Especially high temperatures are to some extent locally possible as a result of an even current
loading. Operating states with uneven current loading include standstill or operation with
short, cyclic rotary motion.
• When commissioning the system for the first time, make the appropriate checks so that it
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
112
voltage for the first time!
is ensured that the rotor does not exceed the maximum temperature of 120 °C.
WARNING
equalization.
1FW6 built-in torque motors
Operating Instructions, 09/2022, A5E52220812B AA