Basic Understanding Of Ac Servos; Servo Mechanisms - YASKAWA SGM series User Manual

FOR FIRST−TIME USERS OF AC SERVOS

1.1.1 Servo Mechanisms

1.1

Basic Understanding of AC Servos

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1.1.1 Servo Mechanisms
TERMS
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This section describes the basic configuration of a servo mechanism and technical terms
relating to servos and also explains the features of Σ-Series AC Servos.
1.1.1 Servo Mechanisms
1.1.2 Servo Configuration
1.1.3 Features of Σ-Series Servos
You may be familiar with the following terms:
• Servo
• Servo mechanism
• Servo control system
In fact, these terms are synonymous. They have the following meaning:
A control mechanism that monitors physical quantities such as specified positions.
In short, a servo mechanism is like a servant who does tasks faithfully and quickly according
to his master's instructions. In fact, "servo" originally derives from the word "servant."
Servo mechanism
According to Japanese Industrial Standard (JIS) terminology, a "servo mechanism" is de-
fined as a mechanism that uses the position, direction, or orientation of an object as a pro-
cess variable to control a system to follow any changes in a target value (set point).
More simply, a servo mechanism is a control mechanism that monitors physical quantities
such as specified positions. Feedback control is normally performed by a servo mecha-
nism. (Source: JIS B0181)
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