USAPEM-07YRW21 YASKAWA

Detector: A position or speed detector. Normally, an encoder mounted on

a motor is used as a position detector.

Description:

1) Configuration of Servo System

The following diagram illustrates a servo system in detail:

(1) Controlled system: Mechanical system for which the position or speed is to be controlled.

This

 includes a drive system that transmits torque from a servomotor.

(2)

Servomotor: A main actuator that moves a controlled system. Two types are

available: AC servomotor and DC servomotor.

(3) Detector: A position or speed detector. Normally, an encoder mounted on

a motor is used as a position detector.

(4) Servo amplifier: An amplifier that processes an error signal to correct the difference

 between a reference and feedback data and operates the

servomotor accordingly. A servo amplifier consists of a

comparator, which processes error signals, and a power amplifier,

which operates the servomotor.

(5) Host controller: A device that controls a servo amplifier by specifying a position

or speed as a set point.

Servo components (1) to (5) are outlined below:

(1) Controlled system

In the previous figure, the controlled system is a movable table for which the position

or speed is controlled. The movable table is driven by a ball screw and is connected to

the servomotor via gears.

So, the drive system consists of:

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