HEIDENHAIN MANUALplus 620 83
2.6 Units—Predrilling in C axis
"Predrill, contour mill, ICP on face" unit
The unit determines the hole position and machines the hole. The
subsequent milling cycle obtains the hole position from the reference
stored in NF. If the milling contour consists of multiple sections, the
unit machines a hole for each section.
Unit name: DRILL_STI_840_C / Cycles: G840 A1 (see page 328); G71
(see page 293)
Access to the technology database:
Machining operation: Drilling
Affected parameters: F, S
Contour form
FK see page 48
Z1 Milling top edge
P2 Depth of contour
APP Approach: see page 51
DEP Departure: see page 51
Cycle form
JK Milling location
0: On the contour
1, closed contour: Within the contour
1, open contour: Left of the contour
2, closed contour: Outside the contour
2, open contour: Right of the contour
3: Depends on H and MD
H Mill cutting direction
0: Up-cut milling
1: Climb milling
I Contour-parallel oversize
K Infeed-direction oversize
R Approach radius
WB Cutter diameter
NF Position mark
E Delay (dwell time at end of hole) (default: 0)
D Retraction at
0: Rapid traverse
1: Feed rate
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