Siemens Sinumerik 802D sl Programming Manual page 96

Enhanced Level Commands
4.1 Program support functions (1)
Tapered thread cutting cycle
Format
G... X... Z... R... F... ;
G code system A
With the commands of "G... X(U)... Z(W)... R... F... ;" tapered thread cutting cycle
of 1 to 4 as shown in Fig. 4-8 is executed.
+X
Fig. 4-8
The sign of address R is determined by the direction viewing point A' from point B.
Since G78 (G92, G21) is a modal G code, thread cutting cycle is executed by sim-
ply specifying depth of cut in the X-axis direction in the succeeding blocks. It is not
necessary to specify G78 (G92, G21) repeatedly in these blocks.
4-96
G code system B
G92
Z W
4
U
3
2
1
2
I
B
X
2
Tapered thread cutting cycle
SINUMERIK 802D sl/840D sl840D/840Di sl/840Di/810D ISO Turning -- 04.07 Edition
G78
A
Rapid traverse
Feed designated
by F code
A'
θ_
+Z
Details of thread chamfering
L
© SIEMENS AG 2007 All rights reserved
04.07
G code system C
G21
Approx.
45_