HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 211)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 211
4.4 Cont
our f
o
rm
elements
Thread with undercut G24-Geo
G24 defines a linear basic element with a longitudinal thread and
subsequent thread undercut (DIN 76). The thread is an outside or
inside thread (metric ISO fine-pitch thread DIN 13 Part 2, Series 1).
Example: G24-Geo
Parameters
F
Thread pitch
I Undercut depth (radius)
K Width of undercut
Z End point of the undercut
BE, BF, BD, BP and BH (see „Machining attributes for form
elements” on page 201)
FP
Do not machine element (only necessary for TURN PLUS):
 1: Do not machine the element
 Program G24 only in closed contours.
 The thread is machined with G31.
. . .
FINISHED
N1 G0 X40 Z0
N2 G1 X40 BR-1.5 Starting point for thread
N3 G24 F2 I1.5 K6 Z-30 Thread with undercut
N4 G1 X50 Next transverse element
N5 G1 Z-40
. . .