Siemens SINUMERIK 840D sl Function Manual page 119

Settings for intermediate orientation
ORICONIO
If this G-code is active, it is necessary to specify an intermediate orientation with A7, B7, C7
which is specified as a (normalized) vector.
Note
Programming of the end orientation is absolutely necessary in this case.
The change in orientation and the direction of rotation is defined uniquely by the three vectors
Start, End and Intermediate orientation.
All three vectors must be different from each other. If the programmed intermediate
orientation is parallel to the start or end orientation, a linear large circle interpolation of the
orientation is executed in the plane that is defined by the start and end vector.
Angle of rotation and opening angle
The following may be programmed additionally for the angle of the cone:
PHI
PSI
Besides this polynomials of the 5th degree (max.) can be programmed as follows:
PO[PHI] = (a2, a3, a4,
a5)
PO[PSI] = (b2, b3, b4,
b5)
Further interpolation options
It is possible to interpolate the oreintation on a cone which connects tangentially to the
previous change of orientation. This orientation interpolation is achieved by programming the
G-codes ORICONTO.
ORICONTO
A further option for orientation interpolation is to describe the change in orientation through
the path of a 2nd contact point on the tool.
ORICURVE
The coordinates for movement of the 2nd contact point of the tool must be specified. This
additional curve in space is programmed with XH, YH, ZH.
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
orientation interpolation on a cone with intermediate
orientation: Interpolation on a conical peripheral surface with
intermediate orientation setting
angle of rotation for orientation about the direction axis
Opening angle of the cone
Constant and linear coefficients are defined by start and end
orientation respectively.
orientation interpolation on a cone with tangential
orientation: Interpolation on a peripheral surface of the cone
with tangential transition
orientation interpolation with a second curve: Interpolation of
orientation with specification of motion of two contact points
of the tool.
F2: Multi-axis transformations
1.11 Orientation vectors
119