HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 173)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 173
3.2 Units—Pr
e
dr
illing in Y axis
"Predrill, contour mill, ICP in YZ plane" 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_MAN_840_Y / Cycles: G840 A1 (see page 359);
G71 (see page 325)
Access to the technology database:
 Machining operation: Drilling
 Affected parameters: F, S
Parameters on the 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 (radius value)
Parameters on the Cycle form
JK
Cutter position
 JK=0: On the contour
 JK=1, closed contour: Within the contour
 JK=1, open contour: Left of the contour
 JK=2, closed contour: Outside the contour
 JK=2, open contour: Right of the contour
 JK=3: Depending on H and MD
H 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
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