HEIDENHAIN TNC 620 User Manual page 453

Multiple-axis machining | The PLANE function: Tilting the working plane (option 8)
Tilting the rotary axes into position in a separate NC block
To tilt the rotary axes into position in a separate positioning block
(STAY option selected), proceed as follows:
Danger of collision!
The control does not automatically check whether collisions can
occur between the tool and the workpiece. Incorrect or no pre-
positioning before tilting the tool into position can lead to a risk of
collision during the tilting movement!
Program a safe position before the tilting movement
Carefully test the NC program or program section in the
Program run, single block operating mode
Select any PLANE function, and define automatic tilting into
position with STAY. During program run, the control 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 control
Example: Tilt a machine with a rotary table C and a tilting table A to a spatial 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 | TNC 620 | Klartext Programming User's Manual | 01/2022
NOTICE
Position at clearance height
Define and activate the PLANE function
Position the rotary axis with the values calculated by the
control.
Define machining in the tilted working plane
11
453