Siemens SINUMERIK 840D Manual page 103

Reference section
Orientation interpolation
The following G codes are only active, when
$MC_ORI_IPO_WITH_G_CODE is set to 1:
Axis interpolation
ORIAXES Linear interpolation of the machine axes or interpolation of the rotary
axes using polynomials (with active POLY)
Vector interpolation
ORIVECT Interpolation of the orientation vector in a plane (large circle interpola-
tion)
ORIPLANE Interpolation in a plane (large circle interpolation), synonymous with
ORIVECT
ORIPATH Tool orientation in relation to the path. A plane is created from the nor-
mal vector and path tangent that defines the meaning of LEAD and
TILT at the end point. In other words, the path reference only applies to
the definition of the end orientation vector. Large circle interpolation is
performed between the start and end orientations. LEAD and TILT do
not merely provide the lead and tilt angles.
They have the following significance:
LEAD defines the rotation in the plane created by the normal vector
and path tangent. TILT then defines the rotation around the normal
vector. In other words, they correspond to theta and phi in a sphere
coordinate system, with the normal vector serving as the Z axis and
the tangent as the X axis.
ORICONCW Interpolation on a peripheral surface of a cone in the clockwise direc-
tion
ORICONCCW Interpolation on a peripheral surface of a cone in the counterclockwise
direction
Also required in both cases:
A3=... B3=... C3=... or XH=., YH=... , ZH=...
End orientation, cone's axis of rotation: A6, B6, C6
Opening angle: NUT=.
ORICONIO Interpolation on a peripheral surface of a cone with an intermediate ori-
entation specified via A7=... B7=... C7=....
Also required:
A3=... B3=... C3=... or XH=..., YH=..., ZH=... end orientation
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