Siemens SINUMERIK 840D Function Manual page 139

SD42010 $SC_THREAD_RAMP_DISP[<n>] = <Value>
<n>
0
1
2
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Meaning
Acceleration behavior at the
thread run-in:
Acceleration behavior at
thread run-out:
Acceleration behavior for
thread transitions within a
thread chain
<Value> Meaning
< 0 The acceleration of the thread axis when run‐
ning-in the thread is as programmed
(Default: -1)
in BRISK/SOFT
= 0 The acceleration of the thread axis when run‐
ning-in the thread is sudden (step function)
(≙ BRISK).
> 0 The maximum thread run-in distance is speci‐
fied.
Specifying the maximum run-in thread path
can also be specified via address DITS also
in the part program (see "Programmed run-in
and run-out path for G33, G34 and G35
(DITS, DITE) (Page 140)"). When a block is
inserted in the main run, the programmed run-
in path is transferred into the setting data.
Note
Too short a distance can result in the axis
being overloaded when accelerating.
< 0 The braking of the thread axis when running-
ou the thread is as programmed in BRISK/
(Default: -1)
SOFT
= 0 The braking of the thread axis when running-
out the thread is sudden (step function)
(≙ BRISK).
> 0 The maximum thread run-out distance is
specified.
Specifying the maximum run-out thread path
can also be specified via address DITE also
in the part program (see "Programmed run-in
and run-out path for G33, G34 and G35
(DITS, DITE) (Page 140)"). When a block is
inserted in the main run, the programmed run-
out path is transferred into the setting data.
Note
Too short a distance can result in an acceler‐
ation overload of the axis.
= -1 (default) Permits smoothing corners between two
thread blocks in order to maintain dynamic
response limits.
Rounding using smoothing is not carried out
if the dynamic performance of the machine
allows a hard transition, e.g. as a result of the
effectiveness of the overload factor for axial
velocity step/jumps (MD32310
$MA_MAX_ACCEL_OVL_FACTOR).
= 0 Corners between two thread blocks are exe‐
cuted precisely without rounding - the axes
follow the control loop commands.
> 0 Reserved
V1: Feedrates
5.2 Path feedrate F
139