HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 159)

HEIDENHAIN CNC PILOT 4290 159
4.7 Cont
our F
o
rm
Elements
Undercut type K (H=9)
Thread (standard) G34-Geo
G34 defines a simple or an interlinked external or internal thread
(metric ISO fine-pitch thread DIN 13 Series 1). The CNC PILOT
calculates all the required values.
Threads are interlinked by programming several G01/G34 blocks after
each other.
Example: Call G25-Geo type K
. . .
N.. G1 Z-15 [longitudinal element]
N.. G25 H9 I1 R0.8 W40 [type K]
N.. G1 X20 [transverse element]
. . .
Parameters
H Undercut type K: H=9
I Undercut depth
R Undercut radius—no value: The circular element is not
machined
W Undercut angle
A Angle to longitudinal axis (default: 45°)
Example: G34
. . .
FERTIGTEIL [FINISHED PART]
N1 G0 X0 Z0
N2 G1 X20 B-2
N3 G1 Z-30
N4 G34 [metric ISO]
N5 G25 H7 I1.7 K7
N6 G1 X30 B-1.5
N7 G1 Z-40
N8 G34 F1.5 [metric ISO fine-pitch thread]
N9 G25 H7 I1.5 K4
N10 G1 X40
N11 G1 Z-60
. . .
Parameters
F Thread pitch (default: pitch from the standard table
„ You need to program a linear contour element as a
reference before G34 or in the NC block containing G34.
„ Machine the thread with G31.