S-Shaped Acceleration/Deceleration Function - Panasonic MINAS A4P Series Instruction Manual

S-shaped Acceleration/Deceleration Function

S-shaped Acceleration/Deceleration Function
This servo driver can perform the S-shaped acceleration/deceleration at the acceleration/deceleration.
Set the S-shaped acceleration/deceleration in the time to reach the acceleration at the linear acceleration/
deceleration in 16-bit positioning parameter "Positioning S-shaped acceleration/deceleration setting 1st to
4th" and "S-shaped acceleration/deceleration at jog operation".
t t
2 2
t
1
Example 1:
Linear acceleration (t2 = 0)
t
1
V = 2000r/min
1
In order to set:
t = 100ms
1
3000
16.Pr10 = t x
1
V
1
3000
= 100ms x
2000
= 150ms
16.Pr00 1st speed
16.Pr10 1st acceleration
16.Pr11 1st S-shaped acceleration
Caution
1) Change during a motor step operation applies at the next step operation.
2) When a combined block operation is used (16.Pr54 (Block operation type) = 1), all the operations are per-
formed in the linear acceleration/deceleration, regardless of the S-shaped acceleration/deceleration setting.
3) If the S-shaped acceleration/deceleration setting is "0", the linear acceleration/deceleration applies.
4) Also if a value of the S-shaped acceleration/deceleration setting is out of an available range, the linear
acceleration/deceleration applies.
5) If a deceleration command or travel during the S-shaped acceleration/deceleration is small, smooth S-
shaped characteristics may not be obtained.
6) The calculation above shows a theoretical value. Actual S-shaped acceleration/deceleration may cause
an error in the setting.
• Available set range of S-shaped acceleration/deceleration (decimals omitted)
2500 p/r encoder S-shaped acceleration/deceleration setting [ms]
17-bit encoder S-shaped acceleration/deceleration setting [ms]
Example of calculation: 2500 p/r encoder
For acceleration/deceleration setting = 1000 [ms], an available set range of S-shaped acceleration/deceleration is:
S-shaped acceleration/deceleration setting [ms] < = (127950 ÷ 1000) – 1 < = 126.950 [ms]
Therefore, for the S-shaped acceleration/deceleration setting of 127 [ms] or more, the linear acceleration/
deceleration is enabled.
V
1
V1 = Set speed (16.Pr00)
t1 = Acceleration time
t2 = S-shaped acceleration time (16.Pr11)
Example 2:
S-shaped section less than 50% (t2 <
V
1
t
2
In order to set:
16.Pr10 = (t
1 –
= 70ms x
= 105ms
2000 16.Pr00 1st speed
150 16.Pr10 1st acceleration
0 16.Pr11 1st S-shaped acceleration
16-bit positioning parameter "Positioning S-
shaped acceleration/deceleration setting 1st to
4th" is for input of a value of acceleration time
in a range between 0 and 3000 r/min. So,
specify as shown below.
<Note>
The examples 1 to 3 below explain the
acceleration and apply also to the
deceleration.
Example 3:
t
1
) S-shaped section 50% (t2 =
2
V
1
t
2
t
1
V = 2000r/min
1
t = 100ms
1
t = 30ms
2
3000
t ) x
2
V
1
3000
2000
2000 16.Pr00
105 16.Pr10
30 16.Pr11
(127950 ÷ acceleration/deceleration setting [ms]) – 1
( 1677066.24 ÷ acceleration/deceleration setting [ms] ) – 1
[Operation Setting]
t t
2 2
t
1
V = 2000r/min
1
In order to set: t = 100ms
1
t = 50ms
2
3000
16.Pr10 = (t t ) x
1 – 2
V
1
3000
= 50ms x
2000
= 75ms
1st speed
1st acceleration
1st S-shaped acceleration
t
1
)
2
V
1
2000
75
50
131