APPLICATIONS OF
Σ
-SERIES PRODUCTS
3.5.1
Using the Soft Start Function
114
3.5
Running the Motor Smoothly
This section explains how to run the servomotor smoothly.
3.5.1
Using the Soft Start Function
114
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3.5.2
Using the Smoothing Function
115
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3.5.3
Adjusting Gain
115
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3.5.4
Adjusting Offset
116
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3.5.5
Setting the Torque Reference Filter Time Constant
116
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3.5.1 Using the Soft Start Function
1) The soft start function adjusts progressive speed reference input inside the Servopack so
that acceleration and deceleration can be as constant as possible. To use this function,
set the following user constants.
Cn-07
SFSACC
Soft Start Time (Acceleration)
Unit:
ms
Setting
Range:
0 to
10000
Factory
Setting:
0
For Speed/Torque
Control Only
Cn-23
SFSDEC
Soft Start Time (Deceleration)
Unit:
ms
Setting
Range:
0 to
10000
Factory
Setting:
0
For Speed/Torque
Control Only
In the Servopack, a speed reference is multiplied
by the acceleration or deceleration value set in
Cn-07 or Cn-23 to provide speed control.
Smooth speed control can be achieved when pro-
gressive speed references are input or when con-
tact input speed control is used.
Set these user constants as follows.
Cn-07: Time interval from the time the motor starts until the maximum speed (4500
r/min) is reached
Cn-23: Time interval from the time the motor is running at the maximum speed (4500
r/min) until it stops
3
Speed/Torque
Speed
reference
Soft start
Servopack
internal speed
reference
Cn-07: Set this time interval.
Cn-23: Set this time interval.