Siemens SINUMERIK 840Di sl Programming Manual page 172

Motion commands
4.15 Thread cutting with constant lead (G33)
Parameters
DITS
DITE
Value
Note
Only paths, and not positions, are programmed with DITS and DITE.
Machine manufacturer
The DITS and DITE commands are related to the setting data SD 42010:
THREAD_RAMP_DISP[0,1], in which the programmed paths are written. If no run-
in/deceleration path is programmed before or in the first thread block, the value is
determined by the setting in SD 42010, see:
References: /FB1/Function Manual Basic Functions; Feedrates (V1)
Example
N...
N40 G90 G0 Z100 X10 SOFT M3 S500
N50 G33 Z50 K5 SF=180 DITS=1 DITE=3
N60 G0 X20
Description
If the run-in and/or run-out path is very short, the acceleration of the thread axis is higher
than the configured value. This causes an acceleration overload on the axis.
In this case, alarm 22280 "Programmed run-in path too short" is output for the thread run-in
(if configured in MD 11411: ENABLE_ALARM_MASK). The alarm is purely for information
and has no effect on parts program execution.
MD 10710: PROG_SD_RESET_SAVE_TAB is used to set the value written by the parts
program into the corresponding setting data on RESET. The values are therefore retained
after power off/on.
172
Thread run-in path
Thread run-out path
Specification of the run-in and run-out path: -1.0,...n
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
;Start of corner rounding with Z=53
Fundamentals