FOR FIRST−TIME USERS OF AC SERVOS
1.1.1 Servo Mechanisms
4
3) Servo control system
Servo control system is almost synonymous with servo mechanism but places the focus on
system control. In this manual, the term “servo system” is also used as a synonym of servo
control system.
Related Terms Meaning
Servomotor General servomotors or Yaskawa SGM/SGMP
Servomotors. In some cases, a position detector (encoder)
is included in a servomotor.
Servopack Trademark of Yaskawa servo amplifier “SGDA Servopack.”
Servopack is divided into two types: SGDA-jjjS (for
speed/torque control) and SGDA-jjjP (for position
control).
Servo drive A Servomotor and amplifier pair. Also called “servo.”
Servo system A closed control system consisting of a host controller,
servo drive and controlled system to form a servo
mechanism.
Host controller
Reference
Amplifier
(Servopack)
Servomotor
Operate
Controlled
system
Servo drive
Servo system
1
cont.
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