Siemens SIMOTICS L-1FN3 Configuration Manual page 110

Configuration
5.2 Configuring workflow
Both components depend on the type of linear guide used and its loading. Loads are also
included which, depending on the mechanical design version, especially include the forces
due to gravity (F
the motor components as well as tension forces F
All these forces result in a force F
F = F
n
If you set F
F = μ
r
High linear motor velocities can also result in extremely high frictional force values. Note the
specifications of the linear guide manufacturer for the calculation of the frictional forces!
The following figure shows a simplified example for the velocity curve and the
correspondingly occurring frictional forces in a motor.
Figure 5-3
108
from the diagram above) and magnetic forces of attraction F
⊥
+ F + F
⊥ magn spann
= μ ‧ F and F
rc rc n rv
‧ F + μ ‧ v ‧ F
rc n rv n
Example of frictional forces
spann
that is perpendicular ("normal") to the axis:
n
= μ ‧ v ‧ F , the frictional force will be
rv n
Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
between the various guide elements.
between
magn
1FN3 linear motors