HEIDENHAIN TNC 620, User Manual

Page: 118 / 521

Fundamentals | NC fundamentals
3
Workpiece coordinate system W-CS
The workpiece coordinate system is a 3-D Cartesian coordinate
system. Its coordinate origin is the active reference point.
The position and orientation of the workpiece coordinate system
depend on the
BASE TRANSFORM.
values of the active line in the
preset table.
Soft key Application
The user determines the position and orientation
of the workpiece coordinate system by using a
3-D touch probe, for example. The control saves
the values determined with respect to the basic
coordinate system as
BASE TRANSFORM.
values
in the preset management.
Further information: "Preset management", Page 192
In the workpiece coordinate system the user defines the position
and orientation of the working plane coordinate system with use of
transformations.
Transformations in the workpiece coordinate system:
3D ROT
functions
PLANE
functions
Cycle
19 WORKING PLANE
Cycle
7 DATUM SHIFT
(shifting before tilting the working plane)
Cycle
8 MIRRORING
(mirroring before tilting the working plane)
The result of transformations built up on each other
depends on the programming sequence.
In every coordinate system, program only the specified
(recommended) transformations. This applies to both
setting and resetting the transformations. Any other use
may lead to unexpected or undesired results. Please
observe the following programming notes.
Programming notes:
Transformations (mirroring and shifting) that are
programmed before the
PLANE
functions (except
for
PLANE AXIAL
) will change the position of the tilt
datum (origin of the working plane coordinate system
WPL-CS) and the orientation of the rotary axes
If you just program a shift, then only the position of
the tilt datum will change
If you just program mirroring, then only the
orientation of the rotary axes will change
When used in conjunction with
PLANE AXIAL
and
Cycle
19
, the programmed transformations (mirroring,
rotation, and scaling) do not affect the position of the
tilt datum or the orientation of the rotary axes
W-CS
B-CS
WPL-CS
W-CS
WPL-CS
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HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022