ADLINK PCI-8258 - Manual (Page 117)

Motion Control Theory 103
PCI-8254 / PCI-8258
In a V-T chart the area under the trapezoidal curve equals motion
distance. If the user does not set up sufficient motion distance, the
controller shall increase (decrease) the maximum speed while
maintain the acceleration, as shown in figure below:
Figure 4-18: Maximum speed by auto-planning
MaxVel is the maximum velocity set up by user, dotted line
indicate speed profile with sufficient distance. As the movement
distance is insufficient, the controller adjust the maximum velocity
to MaxVel’ automatically. The acceleration and deceleration rate
remain intact to maintain the best (shortest) motion time.
Velocity
MaxVel
MaxVel’
Time