Siemens sinumerik 840D sl Function Manual page 100

Detailed description
2.10 Orientation vectors
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.
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
94
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.
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.
Special functions: 3-Axis to 5-Axis Transformation (F2)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0