THORLABS KBD101 User Manual page 54

Chapter 6
In this profile mode, the acceleration increases gradually from 0 to the specified
acceleration value, then decreases at the same rate until it reaches 0 again at the
specified velocity. The same sequence in reverse brings the axis to a stop at the
programmed destination position.
Example
1
J
The figure above shows a typical S-curve profile. In segment (1), the S-curve profile
drives the axis at the specified jerk (J) until the maximum acceleration (A) is reached.
The axis continues to accelerate linearly (jerk = 0) through segment (2) . The profile
then applies the negative value of jerk to reduce the acceleration to 0 during segment
(3). The axis is now at the maximum velocity (V), at which it continues through
segment (4). The profile then decelerates in a similar manner to the acceleration
phase, using the jerk value to reach the maximum deceleration (D) and then bring the
axis to a stop at the destination.
Drive Array Velocities
These parameters relate to the velocity for moves initiated by the DRIVE bar graph.
Each specifies a velocity to apply when the associated bar is clicked. These settings
are applicable in either direction of pot deflection, i.e. 4 possible velocity settings in
the forward or reverse motion directions.
It is acceptable to set velocities equal to each other to reduce the number
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2 3 4
V
-J
A
Fig. 6.8 Typical S-Curve Profile
5 6
-J
D
Time
Note
of speeds.
7
A - acceleration
D - deceleration
V - velocity
J - jerk
J
HA0364T Rev Ck Jan 2017