HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 207)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 207
4.4 Cont
our f
o
rm
elements
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 control calculates
all the required values.
Threads are concatenated by programming several G1/G34 blocks
after each other.
Example: G34
. . .
FINISHED PART
N1 G0 X0 Z0
N2 G1 X20 BR-2
N3 G1 Z-30
N4 G34 [metric ISO]
N5 G25 H7 I1.7 K7
N6 G1 X30 BR-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
. . .
Parameter
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.