Mechanical Boundary Conditions - Siemens SIMOTICS L-1FN3 Configuration Manual

Configuration
5.2 Configuring workflow
5.2.1

Mechanical boundary conditions

Introduction
The constraints that influence the selection of the motor include:
● Dynamic masses (incl. motor mass)
● Effects of gravitation
● Friction
● Machining forces
● Travel lengths
● The drive configuration
Dynamic masses
All machine parts, equipment in the cable carrier, covers, mounting parts, etc. that the motor
has to move, must be included in the calculation of the dynamic mass. The mass of the
motor component moved must also be added. As this is not known – the motor still has to be
selected – the mass of a motor type that is approximately suitable must be used. If, during
the further calculation, it is found that the assumed mass is badly incorrect, an additional
iteration step is required for the motor selection.
In contrast to rotary drives with a mechanical gear reduction, all load masses are fully
included in the acceleration capacity of the drive for a direct drive.
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Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
1FN3 linear motors