HEIDENHAIN TNC 640 User Manual page 613

Multiple-Axis Machining | The PLANE function: Tilting the working plane (option 8)
Example
The example below shows the effect of the TABLE ROT
transformation type in conjunction with a free rotary axis.
...
6 L B+45 R0 FMAX
7 PLANE SPATIAL SPA-90 SPB+20 SPC+0 TURN F5000
TABLE ROT
...
Origin A = 0, B = 45
The control positions the B axis to the axis angle B+45
With the programmed tilting situation with SPA-90, the B axis
becomes the free rotary axis
The control does not position the free rotary axis. The position
of the B axis before tilting the working plane is maintained
Because the workpiece was not positioned, the control
aligns the working plane coordinate system according to the
programmed spatial angle SPB+20
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
Pre-position rotary axis
Tilt working plane
A = -90, B = 45
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