Multiple-Start Threads With G33 - Siemens Sinumerik 840D sl Programming Manual

N029 G28 X0 Y0 M5
N030 G49 Z0
N031 M30
4.1.16

Multiple-start threads with G33

Multiple-start threads are programmed with the G code G33 in the ISO dialect mode.
Format
G33 X.. Z.. F.. Q..
X.. Z.. = End point of the tread
F.. = Thread lead
Q.. = Starting angle
Threads with offset slides are programmed by specifying the mutually offset start points in
the G33 block. The starting point offset is specified as the absolute angle position under the
address "Q". The associated setting data ($SD_THREAD_START_ANGLE) is changed
appropriately.
Example:
Q45000 means: Start offset 45.000 degree
Range of values: 0.0000 to 359,999 degrees
The start angle must always be programmed as an integer. The input resolution of the
angular data is 0.001 degree.
Example:
N200 X50 Z80 G01 F.8 G95 S500 M3
N300 G33 Z40 F2 Q180000
A thread with a lead of 2 mm and a starting point offset of 180 degree is produced.
ISO Milling
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
4.1 Program supporting functions
; Return to reference position,
; Spindle stop
; Deselect the tool length compensation
; End of the program
Additional functions
109