Autonics AiCA Series, User Manual

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12 Driver Function
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 Example of S-curve acceleration/deceleration parameter setting (partial S-curve
acceleration/deceleration)
This example is S-curve acceleration with start drive speed 0 pps and max. drive speed 40
kpps during 0.6 sec. Follow the below graph.
1st Start drive speed as 0 is ignored.
2nd During 0.2 sec, it drives trapezoidal acceleration up to 10,000pps.
3rd During 0.2 to 0.4 sec, it maintains the certain acceleration speed up to 30,000pps.
4th At the left 0.2 sec, it drives trapezoidal deceleration up to 40,000pps.
For each setting value of parameters and descriptions, refer to the below table.
Parameter Setting value Description
Acceleration Time
6000 msec For S-curve drive,
acceleration/deceleration time should
be same.
Deceleration Time
6000 msec
S Curve Time (S-curve
acceleration/deceleration
time)
2000 msec
It applies start drive speed + S Curve
Time and max. drive speed - S Curve
Time.
Start Speed (start drive speed) 0 pps -
Max Speed (max. drive speed) 40000 pps -

Comparing S curve and Trapezoid acceleration/deceleration drive
Trapezoid acceleration/deceleration may cause problems at start and end points in a
very sensitive system. When used for a system that must be heavy, fast and accurate,
and acceleration sharply changes at start and end points, it is hard on the system.
On the other hand, S curve smoothly increases acceleration at the start point and
decreases it smoothly at the end point. Therefore S curve acceleration/deceleration is
recommended for sensitive systems.