HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 246)

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4.23 Dr
illing Cy
cles
4.23 Drilling Cycles
Drilling cycle G71
G71 is used for axial and radial holes using driven or stationary tools
for:
„ Single hole without contour description
„ Hole with contour description (single hole or hole pattern)
Hole positions that you find with the milling cycles G840 A1 .., G845
A1 .., or G846 A1 .., you can pre-drill with G71 NF.. (see “Milling
Cycles” on page 261).
Example: G71
. . .
N1 T5 G97 S1000 G95 F0.2 M3
N2 G0 X0 Z5
N3 G71 Z-25 A5 V2 [drilling]
. . .
Parameters
NS Block number of contour
„ Reference to the contour of the hole (G49-, G300- or G310-
Geo)
„ No input: Single hole without contour description
NF Reference from which the cycle reads the hole positions [1 to
127].
X End point of axial hole (diameter value)
Z End point of radial hole
E Period of dwell for chip breaking at end of hole (in seconds)—
(default: 0)
V Feed rate reduction (50 %)—(default: 0)
„ V=0 or 2: Reduction at start
„ V=1 or 3: Reduction at start and end
„ V=4: Reduction at end
„ V=5: No reduction
D Retraction speed (default: 0)
„ D=0: Rapid traverse
„ D=1: Feed rate
K Retraction plane (radial holes, holes in the YZ plane:
diameter)—(default: retract to starting position or to safety
clearance)
H1 As of software version 625 952-04:
Spindle brake (H1 is evaluated if the brake is entered in
machine parameter 1019, ..)—default: 0
„ 0: Activate the spindle brake
„ 1: Deactivate the spindle brake