Cantilever Force Diagrams - Siemens simodrive 611 Configuration Manual

Technical Data and Characteristics

Cantilever force diagrams

3.2 Cantilever force diagrams
Cantilever force stressing
Point of application of cantilever forces F
• for average operating speeds
• for a nominal bearing lifetime of 20,000 h
Fig. 3-106
Dimension x: Distance between the point of application of force F
mm.
Dimension l: Length of the shaft end in mm.
Calculating the belt pre-tension force F
F [N] = 2 • M
R
Table 3-67
Formula abbreviations
F
R
M
0
c
d
R
When using other configurations, the actual forces generated from the torque being trans-
ferred must be taken into account.
3-128
Force application point at the drive shaft end
R
• c / d
0 R
Explanation of the formula abbreviations
Units
N
Nm
–––
m
Configuration Manual, (PFT6), 10.2005 Edition, 6SN1197-0AD02-0BP1
at the shaft end
Q
= F
F
R Qper
Description
Belt pre-tension
Motor stall torque
Pre-tensioning factor; the pre-tensioning factor is an
empirical value from 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
Effective diameter of the belt pulley
and the shaft shoulder in
Q
1FT6 Synchronous Motors