HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 360)

360 DIN Programming
4.26 Milling cy
cles
Program D and V to machine parts of a figure.
D Starting element number for partial figures
The direction of contour definition for figures is
counterclockwise. The first contour element for figures:
 Circular slot: The larger arc
 Full circle: The upper semicircle
 Rectangles, polygons and linear slots: The orientation angle
points to the first contour element.
V Ending element number for partial figures
A Sequence for "Calculate hole positions": A=1
NF Position mark—reference at which the cycle stores the hole
positions [1 to 127].
WB Rework diameter—diameter of the milling cutter
 The cycle takes the diameter of the active tool into
account when calculating the hole positions. Therefore,
you need to insert the drill before calling "G840 A1 ..".
 Program oversizes for calculating the hole positions and
for milling.
G840 overwrites any hole positions that may still be stored
at the reference "NF."
Parameters—Calculating hole positions