Siemens SINUMERIK 840D sl Function Manual page 120

F2: Multi-axis transformations
1.11 Orientation vectors
Besides the two end values, additional polynomials can be programmed in the following form:
PO[XH] = (xe, x2, x3, x4, x5): (xe, ye, ze) the end point of the curve, and
PO[YH] = (ye, y2, y3, y4, y5): xi, yi, zi the coefficients of the polynomials
PO[ZH] = (ze, z2, z3, z4, z5): of the 5th degree maximum.
This type of interpolation can be used to program points (G1) or polynomials (POLY) for the
two curves in space.
Note
Circles or involutes are specificaly not allowed. It is also possible to activate a spindle
interpolation with BSPLINE. The programmed end points of both curves in space are then
interpreted as nodes.
Other types of splines (ASPLINE and CSPLINE) and the activation of a compressor
(COMPON, COMPCURV, COMPCAD) are not permitted here.
Boundary conditions
The extended interpolation of orientations requires that all necessary orientation
transformations be considered, since these belong to the functional scope.
Activation
A change in orientation on any peripheral surface of a cone in space is activated with the G-
code of group 51 through extended interpolation of the orientation vector, using the following
commands:
ORIPLANE
ORICONCW
ORICONCCW
ORICONIO
ORICONTO
ORICURVE
ORIPATH
ORIPATHS
120
Interpolation in a plane with specification of the end
orientation (same as ORIVECT)
Interpolation on a peripheral surface of a taper in clockwise
directionwith specification of the end orientation and taper
direction or opening angle of the cone.
Interpolation on the peripheral surface of a cone in the
counterclockwise direction. Specification of the end
orientation andt cone direction or opening angle of the taper.
Interpolation on a peripheral surface of a cone with
specification of end orientation and an intermediate
orientation.
Interpolation on a peripheral surface of a cone with
tangential transition and specification of end orientation.
Interpolation of orientation with specification of motion of two
contact points of the tool.
Tool orientation in relation to the path
Tool orientation in relation to the path, when, for example, a
kink in the orientation path, e.g. at a corner in the contour, is
to be smoothed, see Chapter "Orientation Relative to the
Path".
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions