Heidenhain MANUALplus 4110 User Manual Page 344

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344 6 DIN Programming
6.16 Undercut Cycles
6.16 Undercut Cycles
Undercut contour G25
G25 generates an undercut form element (DIN 509 E, DIN 509 F,
DIN 76) that can then be integrated in roughing or finishing cycles. The
table in the graphic support window describes the parameters for
undercuts.
Parameters
H type of undercut (default: 0)
H=0, 5: DIN 509 E
H=6: DIN 509 F
H=7: DIN 76
I undercut depth (default: Value from standard table)
K undercut width (default: Value from standard table)
R undercut radius (default: Value from standard table)
P transverse depth (default: Value from standard table)
W undercut angle (default: Value from standard table)
A transverse angle (default: Value from standard table)
FP thread pitch—no input: FP is calculated from the thread
diameter
U finishing oversize (default: 0)
E reduced feed rate for machining the undercut (default: Active
feed rate)
Note:
If the parameters are not defined, MANUALplus determines the
following values from the diameter or the thread pitch (undercut
DIN 76) in the standard table (see “Thread Pitch” on page 524):
DIN 509 E: I, K, W, R
DIN 509 F: I, K, W, R, P, A
DIN 76: I, K, W, R and FP (determined from the diameter)
Example: G25
%25.nc
[G25]
N1 T1 G95 F0.4 G96 S150 M3
N2 G0 X62 Z2
N3 G819 P4 H0 I0.3 K0.1
N4 G0 X13 Z0
N5 G1 X16 Z-1.5
N6 G1 Z-30
N7 G25 H7 I1.15 K5.2 R0.8 W30 FP1.5
N8 G1 X20
N9 G1 X40 Z-35
N10 G1 Z-55 B4
N11 G1 X55 B-2
N12 G1 Z-70
N13 G1 X60
N14 G80
END
All parameters that you enter will be accounted for—
even if the standard table prescribes other values.
If you are programming an internal thread, it is advisable
to preset the "thread pitch FP," since the diameter of the
longitudinal element is not the thread diameter. If you
have MANUALplus calculate the thread pitch
automatically, slight deviations may occur.
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