Encoders

What are the main components of an optical encoder

Led (Scanning unit), "Opaque transparent" disk

Please describe the optical scanning system

Led emit light through the "opaque transparent" disk, which convert the led signal into sin-cos or train pulse signal a the output of the encoder

What is an incremental encoder?

Provides speed and direction of rotation (position after being referenced) Position is lost after after power failure

What is an absolute encoder?

Provides unique code of the position on each step performed within one turn Position is NOT lost after power failure

What is the main task and function of an encoder?

1. To convert mechanical motion into electric signals 2. Detecting Angular or linear position, speed and direction

Please call the typical mechanical interface

Face mounting flange Servo flange Blind Hollow shaft Through hollow shaft

Why do incremental encoders have two output channels

For redundance purposes, being sure that the position travelled by the system is exactly the same as the position at the output of the encoder

What is the function of the Zero (C) Pulse?

For reference purposes

Where are encoders used?

OEM and End Users (Print, Motion and Drives, Handling, Food & Beverage, Pharma, Packaging)

What are the advantages and the disadvantages of optical and magnetic

Optical: Adv - Resolution and Speed (up to 12kRPM) Dis - Weak Construction Magnetic: Adv - Robustness and Price Dis - Size and Low flexibility

What is the benefit of an absolute encoder

Position retained after power failure, quick start-up of the system

What is the benefit of an incremental encoder

Simpler signal at the output of the encoder Cheaper than absolute encoder

Please describe the magnetic scanning system

The magnetic sensors built into the encoder detects the position of the encoder and generate the output based on yours sin and cos signals