HEIDENHAIN ITNC 530 User Manual page 501

Positioning the rotary axes in a separate block
Proceed as follows if you want to position the rotary axes in a separate
positioning block (option STAY selected):
Pre-position the tool to a position where there is no danger
of collision with the workpiece (clamping devices) during
positioning.
Select any PLANE function, and define automatic positioning with the
STAY option. During program execution the TNC calculates the
position values of the rotary axes present on the machine, and
stores them in the system parameters Q120 (A axis), Q121 (B axis)
and Q122 (C axis).
Define the positioning block with the angular values calculated by
the TNC.
NC example blocks: Position a machine with a C rotary table and an
A tilting table to a space angle of B+45°.
...
12 L Z+250 R0 FMAX
13 PLANE SPATIAL SPA+0 SPB+45 SPC+0 STAY
14 L A+Q120 C+Q122 F2000
...
HEIDENHAIN iTNC 530
Position at clearance height
Define and activate the PLANE function
Position the rotary axis with the values calculated by
the TNC
Define machining in the tilted working plane
501