Siemens SINUMERIK 840D sl Function Manual page 389

radius compensations. Nevertheless, workpiece machining operations close to the pole are
not recommended since these may require sharp feedrate reductions to prevent overloading
of the rotary axis.
New features
A pole is said to exist if the line described by the tool center point intersects the turning center
of the rotary axis.
The following cases are covered:
● Under what conditions and by what methods the pole can be traversed
● The response in pole vicinity
● The response with respect to working area limitations
● Monitoring of rotary axis rotations over 360°.
Pole traversal
The pole can be traversed by two methods:
● Traversal along linear axis
● Traversal into pole with rotation of rotary axis in pole
Traversal along linear axis
Figure 7-1
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Traversal of x axis through pole
M1: Kinematic transformation
7.1 TRANSMIT face end transformation (option)
389