FOR FIRST−TIME USERS OF AC SERVOS1.1.1 Servo Mechanisms21.1 Basic Understanding of AC ServosThis section describes the basic configuration of a servo mechanism and technical termsrelating to servos and also explains the features of Σ-Series AC Servos.1.1.1 Servo Mechanisms 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.1.2 Servo Configuration 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.1.3 Features of Σ-Series Servos 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.1.1 Servo MechanismsYou may be familiar with the following terms:• Servo• Servo mechanism• Servo control systemIn 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 accordingto his master’s instructions. In fact, “servo” originally derives from the word “servant.”TERMS Servo mechanismAccording 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 quantitiessuch as specified positions. Feedback control is normally performed by a servo mecha-nism. (Source: JIS B0181)1
