Planning Guide AC Servomotors 1FT5 - Siemens Automation and ...
Planning Guide AC Servomotors 1FT5 - Siemens Automation and ...
Planning Guide AC Servomotors 1FT5 - Siemens Automation and ...
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Technical Data <strong>and</strong> Characteristics<br />
2.2 Cantilever force diagrams<br />
2.2 Cantilever force diagrams<br />
Cantilever force stressing<br />
Point of application of cantilever forces FQ at the shaft end<br />
<strong>1FT5</strong>/2-70<br />
� for average operating speeds<br />
� for a nominal bearing lifetime of 20 000 h<br />
Fig. 2-35 Force application point at the drive shaft end<br />
F Q<br />
l<br />
x<br />
Dimension x: Distance between the point of application of force FQ <strong>and</strong> the<br />
shaft shoulder in mm.<br />
Dimension l: Length of the shaft end in mm.<br />
Calculating the pre–tensioned belt force<br />
FR = 2 � M0 � c/dR<br />
FR [N] Belt pre–tension force<br />
M0 [Nm] Motor st<strong>and</strong>still torque<br />
dR<br />
Effective diameter of the belt pulley<br />
c Pre–tension factor for the accelerating torque<br />
Experience values for toothed belts c = 1.5 to 2.2<br />
Experience values for flat belts c = 2.2 to 3.0<br />
When using other configurations, the actual forces, generated from the torque<br />
being transferred, must be taken into account.<br />
FR � FQper<br />
05.03<br />
© <strong>Siemens</strong> AG 2003 All rights reserved<br />
<strong>AC</strong> <strong>Servomotors</strong> <strong>1FT5</strong> (PFT5) – 05.03 Edition
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