Siemens SINUMERIK 840D Manual page 57

Linear interpolation
(ORIAXES)
Vector interpolation,
large circle interpolation
(ORIVECT/ORIPLANE)
Key functions for 5-axis machining
Orientation interpolation of the axes
Linear interpolation (ORIAXES)
1
ORIAXES
Vector interpolation (ORIVECT/ORIPLANE)
1
ORIVECT
ORIPLANE
© Siemens AG All rights reserved. SINUMERIK, Manual, 5-axis machining
With linear interpolation between a
and an
rotary axis movements are divided into equi-
distant sections.
This results in a wall surface that is not flat
when using circumferential milling to create
inclined walls, for example.
CAM systems attempt to compensate for this
effect by using sufficiently small interpolation
steps. For optimum results, another type of
interpolation (such as vector interpolation)
2 should be used for these kinds of applications.
Axis/Linear interpolation
Linear interpolation of the machine axes or interpolation of the
rotary axes using polynomials (with active POLY)
In the case of vector interpolation between a
start and an end orientation, the path is inter-
polated so that the orientation vector runs in a
plane created by the start and end vectors.
The angle between the start and end vectors
is divided into equidistant steps at a constant
velocity. This kind of orientation interpolation
can be used, for example, to enable precise
machining of sloping, flat walls in one block.
Applications:
Structural components within the aviation
2
industry
Face milling of mold making applications
Vector interpolation
Interpolation of the orientation vector in a plane (large circle inter-
polation)
Interpolation in a plane (large circle interpolation), identical to
ORIVECT
3.5
1
end orientation, the necessary
2
start
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