HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 291)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 291
4.1
9
Thr
ead cy
cles
Thread cycle G31
G31 machines simple threads, successions of threads and multi-start
threads with G24-, G34- or G37-Geo. G31 can also machine a
threading contour defined directly after the cycle call and concluded by
G80.
Example: G31
. . .
FINISHED PART
N 2 G0 X16 Z0
N 3 G52 P2 H1
N 4 G95 F0.8
N 5 G1 Z-18
N 6 G25 H7 I1.15 K5.2 R0.8 W30 BF0 BP0
N 7 G37 Q12 F2 P0.8 A30 W30
N 8 G1 X20 BR-1 BF0 BP0
N 9 G1 Z-23.8759 BR0
N 10 G52 G95
N 11 G3 Z-41.6241 I-14.5 BR0
N 12 G1 Z-45
Parameters
ID
Auxiliary contour—ID number of the contour to be machined
NS Contour start block number (reference to basic element G1-
Geo; for successions of threads: block number of the first
basic element)
NE Contour end block number (reference to basic element G1-
Geo; for successions of threads: block number of the last basic
element)
O Identifier start/end (default: 0) A chamfer/rounding arc is
machined:
 0: No machining
 1: At beginning
 2: At end
 3: At beginning and end
 4: Chamfer/rounding arc is machined—not the basic
element (prerequisite: Contour section with one element)
J Reference direction:
 No input: The reference direction is determined from the
first contour element.
 J=0: Longitudinal thread
 J=1: Transverse thread
I Maximum infeed
No input and V=0 (constant chip cross section):
I = 1/3 * F
IC Number of cuts. The infeed is calculated from IC and U. Usable
with:
 V=0 (constant chip cross section)
 V=1 (constant infeed)
B Run-in length
No input: The run-in length is determined from the contour. If
this is not possible, the value is calculated from the kinematic
parameters. The thread contour is extended by the value B.
P Overrun length
No input: The run-out length is determined from the contour. If
this is not possible, the value is calculated. The thread contour
is extended by the value P.
A Approach angle (angle of infeed) (default: 30°)