Smoothing Of Orientation Characteristic (Oripaths A8=, B8=, C8=) - Siemens SINUMERIK 840D sl Programming Manual

7.5.4

Smoothing of orientation characteristic (ORIPATHS A8=, B8=, C8=)

Function
Changes of orientation that take place with constant acceleration on the contour can cause
unwanted interruptions to the path motions, particularly at the corner of a contour. The
resulting blip in the orientation characteristic can be smoothed by inserting a separate
intermediate block. If ORIPATHS is active during reorientation, the change in orientation
occurs at a constant acceleration. The tool can be retracted in this phase.
Machine manufacturer
Please refer to the machine manufacturer's notes on any predefined machine and setting
data used to activate this function.
Machine data can be used to set how the retracting vector is interpreted:
1. In the TCS, the Z coordinate is defined by the tool direction.
2. In the WCS, the Z coordinate is defined by the active plane.
For more detailed information about the "Orientation relative to the path" function, please
refer to
References: /FB3/ Function Manual, Special Functions; 3- to 5-Axis Transformation (F2)
Programming
Further programming details are needed at the corner of the contour for constant tool
orientations relative to the path as a whole. The direction and path length of this motion is
programmed via the vector using the components A8=X, B8=Y C8=Z.
N... ORIPATHS A8=X B8=Y C8=Z
Parameters
ORIPATHS
A8= B8= C8=
X, Y, Z
Note
Programming direction vectors A8, B8, C8
If the length of this vector is exactly zero, no retracting movement is executed.
ORIPATHS
Tool orientation relative to the path is activated using ORIPATHS. The orientation is
otherwise transferred from the start orientation to the end orientation by means of linear
large-radius circular interpolation.
Job planning
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
Tool orientation relative to the path; blip in
orientation characteristic is smoothed
Vector components for direction and path length
Retracting movement in tool direction
Transformations
7.5 Orientations relative to the path
7-43