HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 117)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 117
2.6 Units—Pr
e
dr
illing in C axis
"Predrill, pocket mill, ICP on lateral surface" 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 pocket consists of multiple sections, the unit
machines a hole for each section.
Unit name: DRILL_MAN_845_C / Cycles: G845 A1 (see page 369);
G71 (see page 325)
Access to the technology database:
 Machining operation: Drilling
 Affected parameters: F, S
Contour form
FK
see page 62
NS Starting block no. of contour
NE End block no. of contour
X1 Milling top edge (diameter value)
P2 Depth of contour
Cycle form
JT
Machining direction
 0: From the inside out (from the inside towards the
outside)
 1: From the outside in (from the outside towards the
inside)
H Cutting direction
 0: Up-cut milling
 1: Climb milling
I Infeed-direction oversize
K Contour-parallel oversize
U Overlap factor (default: 0.5)
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
V Feed rate reduction
 0: Without reduction
 1: At end of the hole
 2: At start of the hole
 3: At start and end of the hole
AB Spot drilling / through drilling length (distance for feed rate
reduction)
RB Retraction plane (diameter value)
Further forms: see page 60