Siemens Sinumerik 802D sl Programming Manual page 44

Commands Calling Axis Movements
2.2 Using the thread cutting function
Number of threads and Q command
In general, the thread cutting start points lie on the workpiece circumference; the
intervals of these points are calculated by dividing 360_ by the number of threads.
Examples of multiple threads (double-start, triple-start, and quadra-start threads)
are shown in Fig. 2-21.
Thread cutting start point --
double-start thread
1st thread:
2nd thread: Q180.
Fig. 2-21
2-44
Table 2-7 Address Q specified in multi--thread cut-
ting
Least input increment
Programmable range
Thread cutting start point --
triple-start thread
No Q command 1st thread:
2nd thread:
3rd thread:
Number of threads and Q commands
SINUMERIK 802D sl/840D sl840D/840Di sl/840Di/810D ISO Turning -- 04.07 Edition
: 0.001_
: 0 ≦ B < 360.000
Thread cutting start point --
quadra-start thread
No Q command 1st thread:
Q120.
2nd thread: Q90.
Q240.
3rd thread:
4th thread:
© SIEMENS AG 2007 All rights reserved
04.07
No Q command
Q180.
Q270.