HEIDENHAIN TNC 640, User Manual, Page: 598 / 948

Multiple-Axis Machining | The PLANE function: Tilting the working plane (option 8)
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
Defining the working plane with two vectors:
PLANE VECTOR
Application
You can use the definition of a working plane via two vectors if
your CAD system can calculate the base vector and normal vector
of the tilted machining plane. A normalized input is not necessary.
The control internally calculates the normal, so you can enter
values between -9.999999 and +9.999999.
The base vector required for the definition of the machining plane
is defined by the components
BX, BY
and
BZ.
The normal vector is
defined by the components
NX
,
NY
and
NZ
.
Programming notes:
The control calculates standardized vectors from the
values you enter.
The normal vector defines the slope and the
orientation of the working plane. The base vector
defines the orientation of the main axis X in the
defined working plane. To ensure that the definition
of the working plane is unambiguous, you must
program the vectors perpendicular to each other.
The machine tool builder defines how the control will
behave for vectors that are not perpendicular.
The programmed normal vector must not be too
short, e.g. all directional components having a length
of 0 or 0.0000001. In this case, the control would not
be able to determine the slope. Machining is aborted
and an error message is displayed. This behavior
is independent of the configuration of the machine
parameters.
You can select the desired positioning behavior.
Further information: "Specifying the positioning
behavior of the PLANE function", page 606