Siemens SIMOTICS S-1FK2 Series User Manual

Mechanical properties
3.7 Radial eccentricity, concentricity and axial eccentricity
1FK2 synchronous motors for SINAMICS S120
Configuration Manual, 06/2019, A5E46927724B AB
37
3.6.3
Sample calculation of the belt pre-tension
Note
Carefully comply with the guidelines provided by the belt manufacturer
•
Carefully comply with the guidelines provided by the belt manufacture when configuring
the motor for radial forces at the shaft extension.
•
Adjust the belt tension using the appropriate measuring instruments.
F
V
= 2 • M
0
• c / d
R
F
V
≤ F
R, perm
Table 3- 2 Explanation of the formula abbreviations
Formula abbreviations
Unit
Description
F
V
N
Belt pre-tension
M
0
Nm
Motor static torque
c ––– Pre-tensioning factor; this factor is an empirical value provided
by the belt manufacturer. It can be assumed as follows:
for toothed belts: c = 1.5 to 2.2
for flat belts c = 2.2 to 3.0
d
R
m
Effective diameter of the belt pulley
F
R, perm
N
Permissible radial force
When using other configurations, you must take into account the actual forces generated
from the torque being transferred.
3.7
Radial eccentricity, concentricity and axial eccentricity
The shaft and flange accuracies for the 1FK2 motors are implemented to DIN 42955 (IEC
60072-1) as standard (Normal class).
Table 3- 3 Radial eccentricity tolerance of the shaft to the frame axis (referred to cylindrical shaft
extension)
Motor
Standard (Normal class)
1FK2❑03 0.035 mm
1FK2❑04
0.04 mm
1FK2❑05
1FK2❑06
1FK2❑08
0.05 mm
1FK2❑10

Siemens SIMOTICS S-1FK2 Series Specifications

General

Brand	Siemens
Model	SIMOTICS S-1FK2 Series
Category	Servo Drives
Language	English