Siemens SINUMERIK 840D sl Function Manual page 1737

SD42010
Only paths, and not positions, are programmed with DITS and DITE.
The part program instructions are related to the setting data:
SD42010 $SC_THREAD_RAMP_DISP[0,1],
, which defines the following acceleration response of the axis on thread cutting:
• SD42010 ≤ 0 to –1
• SD42010 = 0
• SD42010 ≥ 0
Compatibility
Machine data:
MD20650 $MC_THREAD_START_IS_HARD
is dispensed with and is replaced by:
SD42010 $SC_THREAD_RAMP_DISP[0]
or
SD42010 $SC_THREAD_RAMP_DISP[1]
.
The response of the new setting data with:
SD42010 $SC_THREAD_RAMP_DISP[0] = 0
or
SD42010 $SC_THREAD_RAMP_DISP[1] = 0
is identical to the previous machine data setting:
MD20650 $MC_THREAD_START_IS_HARD = 1.
The response with:
SD42010 $SC_THREAD_RAMP_DISP[0] = -1
or
SD42010 $SC_THREAD_RAMP_DISP[1] = -1
is identical to the previous machine data setting:
MD20650 $MC_THREAD_START_IS_HARD = 0 (default).
Basic logic functions: Feeds (V1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Identical with previous response.
Starting/braking of the feedrate axis at configured acceleration rate.
Jerk according to current BRISK/SOFT programming.
Abrupt starting/braking of the feedrate axis on thread cutting.
The thread run-up/deceleration distance is specified.
To avoid technology alarm 22280, the acceleration limits of the axis must be observed in
case of very small run-in and run-out paths.
Note
DITE acts at the end of the thread as a rounding clearance. This achieves a smooth
change in the axis movement.
Detailed description
2.1 Path feedrate F
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