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Sigma II User's Manual
6.1 Smooth Operation
This section provides technical information on the smooth operation of servomotors.
6.1.1
Using the Soft Start Function
The soft start function adjusts progressive speed reference input inside the servo
amplifier so that acceleration and deceleration can be as constant as possible. To use
this function, set the following parameters.
Parameter
Pn305
Soft Start Acceleration Time
Pn306
Soft Start Deceleration Time
In the servo amplifier, a speed reference is multiplied by the acceleration or deceler-
ation value set in Pn305 or Pn306 to provide speed control.
The soft start function enables smooth speed control when progressive speed refer-
ences are input or when contact input speed control is used. Set both Pn305 and
Pn306 to "0" for normal speed control.
Set these parameters as follows:
•
Pn305: The time interval from the time the motor starts until the maximum
•
Pn306: The time interval from the time the motor is operating at the maximum
Signal
Setting Range: 0 to 10000
Default Setting: 0
Setting Range: 0 to 10000
Default Setting: 0
speed is reached.
speed until it stops.
Speed reference
Servo amplifier internal
speed reference
Maximum speed
Setting
(ms)
Soft start
Maximum speed
Pn305: Set this time interval.
Pn306: Set this time interval.
6-2
Chapter 6: Servo Adjustment
Description
Speed Control
Speed Control
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