HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 264)

264 DIN programming
4.1
7
Cont
our
-based t
u
rn
ing cy
cles
The control uses the tool definition to distinguish between external
and internal machining.
 The tool radius compensation is active.
 A G57 oversize enlarges the contour (also inside
contours).
 A G58 oversize
 >0: Enlarges the contour
 <0: Is not offset
 G57/G58 oversizes are deleted after cycle end.
Cycle run
1
Calculates the areas to be machined and the cutting
segmentation.
2 Approaches workpiece for first pass from starting point, taking
the safety clearance into account (first in Z direction, then in X).
3 Move at feed rate to target point Z
4 Depending on H:
 H=0: Machines the contour outline
 H=1 or 2: Retracts at 45°
5 Returns at rapid traverse and approaches for next pass.
6 Repeats 3 to 5 until target point X has been reached.
7 If required, repeats 2 to 6 until all areas have been machined.
8 If H=1: Smoothes the contour
9 Retracts as programmed in Q.