HEIDENHAIN ITNC 530 User Manual page 490

9.4 Defining the Machining Plane
with Euler Angles:
EULER PLANE
Function
Euler angles define a machining plane through up to three rotations
about the respectively tilted coordinate system. The Swiss
mathematician Leonhard Euler defined these angles. When applied to
the machine coordinate system, they have the following meanings:
Precession angle Rotation of the coordinate system around the Z
EULPR axis
Nutation angle Rotation of the coordinate system around the X
EULNU axis already shifted by the precession angle
Rotation angle Rotation of the tilted machining plane around the
tilted Z axis
EULROT
Before programming, note the following:
The sequence of the rotations described above is
independent of the active tool axis.
Parameter description for the positioning behavior: See
"Specifying the Positioning Behavior of the PLANE
Function," page 498.
490 9 Programming: Special Functions