Siemens SINUMERIK 840D Function Manual page 373

Parameterization
The "Velocity-dependent jerk adaptation" function is parameterized with the following machine
data:
● MD32437 $MA_AX_JERK_VEL0[<n>] = <threshold value
Lower velocity threshold of the jerk adaptation. Velocity-dependent jerk adaptation takes
effective as of this velocity.
The lower speed threshold can be set separately via the Index n, for each dynamic mode
(see Function Manual "Basic Functions", Section "Dynamic mode for path interpolation"):
● MD32438 $MA_AX_JERK_VEL1[<n>] = <threshold value
Upper velocity threshold of the jerk adaptation. The velocity-dependent jerk reaches its
maximum value j
velocity.
The upper speed threshold can be set separately via the Index n, for each dynamic mode
(see Function Manual "Basic Functions", Section "Dynamic mode for path interpolation"):
● MD32439 $MA_MAX_AX_JERK_FACTOR = <factor>
Factor for the parameterization of the maximum velocity-dependent jerk j
upper velocity threshold MD32438 $MA_AX_JERK_VEL1[<n>]:
j
The velocity-dependent jerk adaptation is active at a value > 1.0.
The velocity-dependent jerk adaptation is inactive at a value = 1.0.
v :
0
v :
1
j :
0
j :
1
Figure 12-5
Note
The velocity-dependent jerk adaptation is only active, if:
MD32439 $MA_MAX_AX_JERK_FACTOR > 1.0
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
parameterized with MD32439 $MA_MAX_AX_JERK_FACTOR at this
max
= (MD32431 $MA_MAX_AX_JERK) * (MD32439 $MA_MAX_AX_JERK_FACTOR)
max
MD32437 $MA_AX_JERK_VEL0
MD32438 $MA_AX_JERK_VEL1
MD32431 $MA_MAX_AX_JERK
MD32439 $MA_MAX_AX_JERK_FACTOR * MD32431 $MA_MAX_AX_JERK
Axial jerk as a function of the axis velocity
B2: Acceleration and jerk
12.2 Functions
>
lower
>
upper
on reaching the
max
373