Drilling Cycle G - HEIDENHAIN MANUALPLUS 620 User Manual

Drilling cycle G71

G71 is used for axial and radial bore holes using driven or stationary
tools.
Parameters
ID Drilling contour—Name of the hole definition
NS Block number of contour
Reference to the contour of the hole (G49-, G300- or G310-
Geo)
No input: Single hole without contour description
XS Starting point of axial hole (diameter value)
ZS Starting point of radial hole
XE Final point of axial hole (diameter value)
ZE Final point of radial hole
K Boring depth (hole depth) (alternative to XE/ZE)
A Drilling lengths (default: 0)
V Bore (through-drilling) variant (feed rate reduction 50%)—
(default: 0)
0: No feed rate reduction
1: Feed reduction for through-drilling
2: Feed reduction for pre-drilling
3: Feed reduction for pre-drilling and through-drilling
RB Return plane (radial holes, holes in the YZ plane: diameter)—
(default: retract to starting position or to safety clearance)
E Period of dwell for chip breaking at end of hole (in seconds)—
(default: 0)
D Retraction type (default: 0)
0: Rapid traverse
1: Feed rate
BS Start element no. (number of the first hole to be machined in
a pattern)
BE End element no. (number of the last hole to be machined in a
pattern)
H (Spindle) Brake off (default: 0)
0: Spindle brake on
1: Spindle brake off
Single hole without contour description: Program XS or
ZS as alternative.
Hole with contour description: Do not program XS, ZS.
Hole pattern: NS refers to the hole contour, and not the
definition of the pattern.
HEIDENHAIN MANUALplus 620
Example: G71
. . .
N1 T5 G97 S1000 G95 F0.2 M3
N2 G0 X0 Z5
N3 G71 Z-25 A5 V2 [drilling]
. . .
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