HEIDENHAIN TNC 640 User Manual page 151

Fundamentals, File Management | Fundamentals
Workpiece coordinate system W-CS
The workpiece coordinate system is a 3-D Cartesian coordinate
system. Its coordinate origin is the active preset.
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 coordi-
nate system as BASE TRANSFORM. values in the
preset management.
Further information: "Managing presets", page 739
The Global Program Settings function (option 44)
additionally provides the following transformations:
Additive basic rotat. (W-CS) is added to a basic
rotation of a 3-D basic rotation from the preset table
and the pallet preset table. Additive basic rotat. (W-
CS) is the first transformation that is possible in the
workpiece coordinate system (W-CS).
Shift (W-CS) is added to the shift (Cycle 7 DATUM
SHIFT) that is defined in the NC program before
tilting the working plane.
Mirroring is added to the mirroring (Cycle 8
MIRRORING) that is defined in the NC program before
tilting the working plane.
Shift (mW-CS) is effective in the so-called "modified
workpiece coordinate system" after applying the
Shift (W-CS) or Mirroring (W-CS) transformation and
before tilting the working plane.
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 MIRROR IMAGE
(mirroring before tilting the working plane)
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
W-CS
B-CS
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