Siemens SINUMERIK 840D sl Function Manual page 228

Functions
2.1 Acceleration without jerk limitation (BRISK/BRISKA) (channel-/axis-specific)
Acceleration profile
Figure 2-1
a
max
v
max
t:
The following features of the acceleration profile can be identified from the figure above:
• Time: t
• Interval: t
• Time: t
Note
The sudden acceleration can normally be avoided by specifying a constant velocity time
(see Section: "Sudden acceleration with constant velocity phase").
• Interval: t
10
Velocity and acceleration schematic for stepped acceleration profile
: Maximum acceleration value
: Maximum velocity value
Time
0
Sudden acceleration from 0 to +a
- t
0 1
Constant acceleration with +a
1
Sudden acceleration from 2 * a
- t
1 2
Constant acceleration with -a
max
; linear increase in velocity
max
with immediate switchover from acceleration to braking
max
; linear decrease in velocity
max
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Basic logic functions: Acceleration (B2)