Linear encoder | Wikipedia audio article
Channel: wikipedia tts
Date: 04/10/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Linear_encoder


00:00:59 1 Physical principle
00:01:16 1.1 Scale/reference based
00:01:26 1.1.1 Optical
00:02:24 1.1.2 Magnetic
00:02:57 1.1.3 Capacitive
00:03:23 1.1.4 Inductive
00:03:44 1.1.5 Eddy current
00:04:24 1.2 Without scales
00:04:33 1.2.1 Optical image sensor
00:04:57 2 Applications
00:05:11 2.1 Measurement
00:05:32 2.2 Motion systems
00:06:03 3 Output signal formats
00:06:13 3.1 Incremental signals
00:06:27 3.1.1 Analog
00:08:45 3.1.2 Digital
00:10:07 3.2 Absolute reference signals
00:10:26 3.2.1 Reference mark
00:11:33 3.2.2 Absolute code
00:12:17 3.3 Limit switches
00:12:44 4 Physical arrangement and protection
00:14:06 5 Encoder terms
00:14:37 6 See also



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SUMMARY
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A linear encoder is a sensor, transducer or readhead paired with a scale that encodes position. The sensor reads the scale in order to convert the encoded position into an analog or digital signal, which can then be decoded into position by a digital readout (DRO) or motion controller.
The encoder can be either incremental or absolute. Motion can be determined by change in position over time. Linear encoder technologies include optical, magnetic, inductive, capacitive and eddy current. Optical technologies include shadow, self imaging and interferometric. Linear encoders are used in metrology instruments, motion systems, inkjet printers and high precision machining tools ranging from digital calipers and coordinate measuring machines to stages, CNC Mills, manufacturing gantry tables and semiconductor steppers.