Encoders

Part Number	Description / PDF	Quantity
EN12-HN22AF18 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 24PPR	0
EN11-VSM0AF20 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 20PPR	232
EN11-HSM1AF15 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 20PPR	0
EN12-HS22AF20 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 24PPR	0
EN12-VN20AF20 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 24PPR	1096
EN16-V22AF15 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 24PPR	1191
EN11-HSM1BF20 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 20PPR	2054
EN12-HS11AF25 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 12PPR	1031
EN11-HSB1AF15 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 20PPR	1034
EN11-HNB0AF20 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 20PPR	416
EN16-H20AF15 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 24PPR	58
EN11-VNB1BQ15 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 20PPR	165
EN11-HNB0BQ20 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 20PPR	0
EN11-VSM1AF20 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 20PPR	2051
EN12-HS22AF18 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 24PPR	0
EN12-HN22AF25 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 24PPR	113
EN12-VS11AF18 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 12PPR	0
EN11-VNB1AQ15 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 20PPR	0
EN11-HSB1AQ20 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 20PPR	287
EN11-HNM1AF15 TT Electronics / BI Technologies	ROTARY ENCODER MECHANICAL 20PPR	1232

Encoders

1. Overview

Encoders are electro-mechanical devices that convert mechanical motion into digital signals. They play a critical role in measuring position, velocity, and direction in automation systems. By translating physical movement into electrical signals, encoders enable precise control in industrial machinery, robotics, and motion control systems. Their importance continues to grow with advancements in Industry 4.0, smart manufacturing, and autonomous systems.

2. Main Types & Functional Classification

Type	Functional Characteristics	Application Examples
Rotary Encoders	Measure angular position/speed using optical/magnetic sensors	CNC machine spindles, motor feedback systems
Linear Encoders	Track straight-line motion with scale and readhead	Coordinate measuring machines, semiconductor manufacturing
Absolute Encoders	Provide unique digital position codes at power-on	Robot joint positioning, multi-axis systems
Incremental Encoders	Generate pulse trains for relative motion measurement	Conveyor belts, speed monitoring systems

3. Structure & Components

Typical encoder construction includes: - Housing (metal/plastic for environmental protection) - Shaft/bearing system (precision-machined for rotational stability) - Sensor module (optical code disk with LED/photodetector or magnetic Hall-effect sensors) - Signal processing circuitry (for noise filtering and waveform shaping) - Output interface (push-pull, open-collector, or digital fieldbus)

4. Key Technical Specifications

Parameter	Importance	Typical Values
Resolution (PPR)	Determines measurement precision	100-10,000 PPR
Accuracy (arc-minutes)	Indicates position measurement reliability	1 to 20 arc-minutes
Output Type	Affects system compatibility	Incremental: TTL/HTL, Absolute: SSI/CANopen
Environmental Rating	Defines operating conditions	IP54-IP69K for dust/water resistance

5. Application Fields

Industrial Automation: Machining centers, assembly robots
Automotive: Electric power steering systems, transmission control
Renewable Energy: Wind turbine blade pitch control
Medical: MRI scanner positioning systems
Aerospace: Flight control surface monitoring

6. Leading Manufacturers & Products

Manufacturer	Product Series	Key Features
Heidenhain	ROC4000	23-bit absolute rotary encoder with 0.1 m accuracy
Omron	E6B2-CWZ6C	Incremental encoder with 1000 PPR and IP67 rating
Balluff	BML-CRK-P-2	Magnetic linear encoder with 1 m resolution
CUI Devices	AMT22	Programmable absolute encoder with SPI interface

7. Selection Guidelines

Key considerations include: - Application type (position vs. speed measurement) - Required resolution and mechanical accuracy - Environmental factors (temperature, vibration, contamination) - Output signal compatibility (analog/digital, communication protocol) - Mechanical mounting constraints (shaft size, space limitations) - Cost-performance trade-offs for the specific application

8. Industry Trends

Current trends shaping encoder technology: - Integration with IoT-enabled condition monitoring systems - Development of high-temperature encoders for extreme environments - Miniaturization for medical and aerospace applications - Adoption of wireless signal transmission for mobile equipment - Increasing use of multi-turn absolute encoders without battery backup - Enhanced cybersecurity features for industrial network protocols

Real-world implementation example: In semiconductor manufacturing, Heidenhain's linear encoders with 1 m accuracy enable nanometer-precision wafer positioning during photolithography processes, achieving 99.999% production yield rates.