HEIDENHAIN MANUALPLUS 620 User Manual page 250

Parameters
V Identifier start/end (default: 0) A chamfer/rounding arc is
machined:
0: At start and end
1: At beginning
2: At end
3: No machining
4: Chamfer/rounding arc is machined—not the basic
element (prerequisite: Contour section with one element)
D Omit elements (see figure)
B Slide lead with 4-axis machining (not yet implemented)
The MANUALplus 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 X direction, then in Z).
3 Moves at feed rate to target point X.
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 Z has been reached.
7 If required, repeats 2 to 6 until all areas have been machined.
8 If H=1: Smooths the contour
9 Retracts as programmed in Q.
250 ISO Programming