Siemens SINUMERIK 840D sl Function Manual page 260

B2: Acceleration
5.2 Functions
Acceleration profile
r
max
a
max
v
max
t:
Figure 5-4
The following features of the acceleration profile can be identified from the figure above:
● Interval: t
Constant jerk with +r
● Interval: t
Constant acceleration with +a
● Interval: t
Constant jerk with -r
velocity until maximum value +v
● Interval: t
Constant jerk with +r
velocity
260
: Maximum jerk value
: Maximum acceleration value
: Maximum velocity value
Time
Jerk, acceleration and velocity schematic with jerk limitation acceleration profile
- t
0 1
; linear increase in acceleration; quadratic increase in velocity
max
- t
1 2
- t
2 3
; linear decrease in acceleration; quadratic decrease in excessive
max
- t
3 4
; linear increase in braking acceleration; quadratic decrease in
max
; linear increase in velocity
max
is reached
max
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions