Yaskawa SGDB - Manual (Page 125)

3.5 Running the Motor Smoothly
113
3.5 Running the Motor Smoothly
This section explains how to run the servomotor smoothly.
3.5.1 Using the Soft Start Function
The soft start function adjusts progressive speed reference input inside the SERVO-
PACK so that acceleration and deceleration can be as constant as possible. To use this
function, set the following parameters.
Cn-07
SFSACC
Soft Start Time (Acceleration)
Unit:
ms
Setting
Range:
0 to
10000
Factory
Setting:
0
For Speed Control
Only
Cn-23
SFSDEC
Soft Start Time (Deceleration)
Unit:
ms
Setting
Range:
0 to
10000
Factory
Setting:
0
For Speed Control
Only
In the SERVOPACK, a speed reference is multi-
plied 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. Normally, set
these to “0”.
Set these parameters as follows.
Cn-07: Time interval from the time the motor starts until the maximum speed is
reached
Cn-23: Time interval from the time the motor is running at the maximum speed until it
stops
3
Speed
reference
Soft start
SGDB
SERVOPACK
internal speed
reference
Cn-07: Set this time interval.
Cn-23: Set this time interval.
Maximum
speed
Maximum
speed