HEIDENHAIN CNC PILOT 640 User Manual page 328

4
O: End of rough cut
0: Lift-up at rapid
1: Half recessng width 45°
U: End of finishing cut
0: Value from glob. param.
1: Parting horizntl. elem.
2: Complete horzntl. elem.
The control uses the tool definition to distinguish between external
and internal machining, or between radial and axial recesses.
Contour cycle repeats can be programmed with G741 before the
cycle call.
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
Radial recess: First Z, then X direction
Axial recess: First X, then Z direction
3 Executes first cut (roughing)
4 Returns at rapid traverse and approaches for next pass
5 Repeats 3 to 4 until the complete area has been machined
6 If required, repeats 2 to 5 until all areas have been machined
7 If Q = 0: Finish-machines the contour
328
DIN/ISO programming | Contour-based turning cycles
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017