Acceleration/Deceleration Process Selection; S-Curve Ratio - Mitsubishi Electric QD77MS User Manual

[Pr.34] Acceleration/deceleration process selection
Set whether to use trapezoid acceleration/deceleration or S-curve acceleration/
deceleration for the acceleration/deceleration process.
Note) Refer to Section 13.7.6 "Acceleration/deceleration processing function" for
details.
Velocity
The acceleration and deceleration
are linear.
<Trapezoid acceleration/deceleration>
[Pr.35] S-curve ratio
Set the S-curve ratio (1 to 100%) for carrying out the S-curve acceleration/
deceleration process.
The S-curve ratio indicates where to draw the acceleration/deceleration curve
using the Sin curve as shown below.
A
B
B/2
Sin curve
S-curve ratio = B/A
Chapter 5 Data Used for Positioning Control
Time
(Example)
B/2
100%
5 - 44
Velocity
The acceleration and deceleration
follow a Sin curve.
<S-curve acceleration/deceleration>
V
Positioning
speed
When S-curve ratio is 100%
V
Positioning
speed
b
a
When S-curve ratio is 70%
Time
t
b/a = 0.7
t