HEIDENHAIN MANUALplus 4110 - Manual (Page 354)

354 6 DIN Programming
6.1
8
Dr
illing Cy
cles
6.18 Drilling Cycles
Drilling cycle G71
You can use cycle G71 with stationary tools for drilling axial holes in
the turning center and with driven tools for drilling axial and radial
holes.
Parameters
 X end point of axial hole (diameter value)
 Z end point of radial hole
 A drilling lengths (default: 0)
 E dwell time for chip breaking at end of hole (default: 0)
 V drilling variants —Feed rate reduced by 50% during both pre-
drilling and through-boring
„ 0: No feed rate reduction
„ 1: Feed reduction for through-boring
„ 2: Feed reduction for pre-drilling
„ 3: Feed reduction for pre-drilling and through-boring
 K drilling depth (radial holes: radius)
„ K is defined: The starting point of the hole is calculated from the
hole end point and "K."
„ K is not defined: "K" is calculated from the hole end point and the
current tool position.
 D retreat —default: 0
„ 0: Rapid traverse
„ 1: Feed rate
Notes:
„ The control starts execution of the cycle at the current tool and
spindle position. The starting point is approached at rapid traverse.
„ Axial hole:
„ Do not program "X."
„ Define "Z."
„ Radial hole:
„ Define "X."
„ Do not program "Z."
„ X and Z are programmed: The control uses the "tool orientation" to
decide whether a radial or an axial hole is machined (see “Drilling
tools” on page 423).
Example: G71
%71.nc
[G71]
N1 T50 G97 S1000 G95 F0.2 M3
N2 G0 X0 Z5
N3 G71 Z-25 A5 V2
END