In the working plane coordinate system WPL-CS you define the position and orientation of the input coordinate system I-CS and therefore the reference for the coordinate system in the NC program. You do this by programming transformations after having tilted the working plane.
Application
Description of function
Properties of the working plane coordinate system WPL-CS
The working plane coordinate system WPL-CS is a three-dimensional Cartesian coordinate system. You use transformations in the workpiece coordinate system W-CS to define the coordinate origin of the WPL-CS.
Workpiece coordinate system W-CS
If no transformations are defined in the W-CS, then the position and orientation of the W-CS and WPL-CS are identical.

Transformations in the working plane coordinate system WPL-CS
- HEIDENHAIN recommends using the following transformations in the working plane coordinate system WPL-CS:
- TRANS DATUM function
- TRANS MIRROR or Cycle 8 MIRRORING function
- TRANS ROTATION function or Cycle 10 ROTATION
- TRANS SCALE function or Cycle 11 SCALING FACTOR
- Cycle 26 AXIS-SPECIFIC SCALING
- PLANE RELATIV function (option 8)
Cycle 26 AXIS-SPECIFIC SCALING
With these transformations you modify the position and orientation of the input coordinate system I-CS.

- Program only the recommended transformations in the respective reference system
- Use tilting functions with spatial angles instead of with axis angles
- Use the Simulation mode to test the NC program
Additional transformations with Global Program Settings (GPS, option 44)
The Rotation (WPL-CS) transformation in the GS workspace has an additive effect to a rotation in the NC program.
Global Program Settings (GPS, option 44)
Additional transformations with mill-turning (option 50)
- The following additional transformations are available with the mill-turning software option:
- Precession angle with the following cycles:
- Cycle 800 ADJUST XZ SYSTEM
- Cycle 801 RESET ROTARY COORDINATE SYSTEM
- Cycle 880 GEAR HOBBING
- OEM transformations defined by machine manufacturers for special turning kinematics
Machine manufacturers can also define an OEM transformation and a precession angle without software option 50.
An OEM transformation takes effect before the precession angle.
If an OEM transformation or a precession angle is defined, the control shows the values on the POS tab of the Status workspace. These transformations are also in effect in milling mode!
Additional transformation with Gear Cutting (option 157)
- You can use the following cycles to define a precession angle:
- Cycle 286 GEAR HOBBING
- Cycle 287 GEAR SKIVING
Machine manufacturers can also define a precession angle without Gear Cutting (software option 157)
Notes
- The programmed values in the NC program refer to the input coordinate system I-CS. If you do not program any transformations in the NC program, then the origin and position of the workpiece coordinate system W-CS, the working plane coordinate system WPL-CS, and the I-CS are identical.
- During pure 3-axis machining, the workpiece coordinate system W-CS and the working plane coordinate system WPL-CS are identical. In this case, all transformations influence the input coordinate system I-CS.
- The result of transformations built upon each other depends on the programming sequence.
- As a PLANE function (option 8), PLANE RELATIV has an effect in the workpiece coordinate system W-CS and orients the working plane coordinate system WPL-CS. The values of additive tilting always relate to the current WPL-CS.