HEIDENHAIN MANUALplus 620 329
4.26 Milling Cycles
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
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