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11 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 0 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
(acceleration time)
6000 msec
For S-curve drive, acceleration/deceleration
time should be same.
Deceleration Time
(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.