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Setting S-curve acceleration/deceleration areas
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S-curve acceleration/deceleration drive is implemented according to the S-curve acceleration curve and
S-curve deceleration curve obtained by approximating the four speed areas (acceleration start,
acceleration end, deceleration start, deceleration end) to parabolic curves.
Between acceleration areas and between deceleration areas, it performs acceleration or deceleration
according to the acceleration curve or deceleration curve that has been approximated by a linear curve.
Setting different values in the acceleration and deceleration curve parameters causes asynchronous
S-curve acceleration/deceleration drive.
S-curve acceleration/deceleration drive
●
Speed
SHSPD
SCAWEA2
SCAWEA3
SCWATE acceleration
SDWATE deceleration curve
curve
SCAWEA1
SCAWEA4
SLSPD
SLSPD
Time
S-curve drive
command
● SCAWEA1: Speed area of S-acceleration curve from the start of acceleration to the start of SCWATE
The S-acceleration curve from the start of acceleration is automatically decided by setting
SCWATE and SCAWEA1.
● SCAWEA2: Speed area of S-acceleration curve from the end of SCWATE to the end of acceleration
The S-acceleration curve to the end of acceleration is automatically decided by setting
SCWATE and SCAWEA2.
● SCAWEA3: Speed area of S-acceleration curve from the start of deceleration to the start of SDWATE
The S-deceleration curve from the start of deceleration is automatically decided by setting
SDWATE and SCAWEA3.
● SCAWEA4: Speed area of deceleration curve from the end of SDWATE to the end of deceleration
The S-deceleration curve to the end of deceleration is automatically decided by setting
SDWATE and SCAWEA4.
SCAWEA12 setting (by the SCAWEA12 SET command)
●
◆ Even if SLSPD and SHSPD are changed, the SCAWEA1 and SCAWEA2 speed areas remain unchanged.
Speed
Speed
SHSPD
SHSPD
SCAWEA2
SCAWEA2
SCWATE
SCWATE
SCAWEA1
SCAWEA1
SLSPD
SLSPD
Speed change
Time
Time
◆ If the SCAWEA1 and SCAWEA2 speed areas overlap, the overlapping areas are smoothly synthesized.
SCAWEA1
SCAWEA2
SCAWEA1+ SCAWEA2
Speed
Speed
Speed
d
d
b
b
c
c
a
a
Time
Time
Time
SCAWEA34 setting (by the SCAWEA34 SET command)
●
◆ Even if SLSPD and SHSPD are changed, the SCAWEA3 and SCAWEA4 speed areas remain unchanged.
Speed
Speed
SHSPD
SHSPD
SCAWEA3
SCAWEA3
SDWATE
SDWATE
SCAWEA4
SCAWEA4
SLSPD
SLSPD
Speed change
Time
Time
◆ If the SCAWEA3 and SCAWEA4 speed areas overlap, the overlapping areas are smoothly synthesized.
SCAWEA3
SCAWEA4
SCAWEA3+ SCAWEA4
Speed
Speed
Speed
a
a
c
c
b
b
d
d
Time
Time
Time