What is a rotary encoder?

A rotary encoder, often referred to as simply a shaft encoder, is an electro-mechanical device that converts angular positioning into output signals. Rotary encoders can be broadly segmented by their feedback type as incremental or absolute.

How do rotary encoders work?

Rotary encoders translate the mechanical rotational motion of an object such as a motor shaft into an electronic signal. Optical rotary encoders measure rotation by shining a LED light through a disc with markings onto an optical sensor to detect motion. Magnetic rotary encoders use a similar principle but measure motion as a magnetized wheel turns and is detected by a magnetic sensor.

What is the output of a rotary encoder?

Incremental rotary encoders output a stream of ubiquitous pulses over 360 degrees of rotation, hence the term pulses per revolution of PPR. Incremental rotary encoders can have one channel output (A), two channel output (AB, known as quadrature) as well as an optional index channel (Z).

When should you use a rotary encoder?

Rotary encoders should be used in any application that requires precision motion control. While a power can be supplied to a motor to make it turn, to control exactly how fast it actually turns requires real time feedback so that the controlling device can increase or decrease power to achieve a consistent motor speed or shaft position. Rotary encoders are therefore indispensable in precision motion control applications including servo motor feedback, robotics, factory automation and more.

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Fast Data Transmission and High Accuracy

The ACURO® AD37 servo motor encoder is extremely precise, with an absolute accuracy of ±36 arc seconds, and is the smallest multiturn absolute encoder in its class. Since data transmission takes place at a speed of 10 MBaud, servo drives can be operated extremely dynamically.

Suitable for speeds up to 12,000 rpm,
Certified according to SIL2, PLd or SIL3, PLe, Category 3.
Can be combined with temperature, cable break, and vibration sensors.

The AD37 servo motor encoder also offers a resolution of 20 bits in single-turn and 12-bit in multi-turn mode. It is also designed with two channels of redundancy, making it ideally suited for applications with functional safety and accuracy requirements.

Functional Safety Encoders

Ensure safety and reliability with our functional safety servo encoder solutions. Designed for SIL2 and SIL3 applications, these encoders offer high-resolution feedback, temperature monitoring, and data storage for critical motor feedback systems.

Designed for SIL2 and SIL3 functional safety applications
High-resolution feedback (24 Bit Singleturn + 12 Bit Multiturn)
Temperature monitoring capabilities ensure safe operation within specified temperature ranges
Internal encoder and motor winding temperature sensors
Versatile interface options, including ACURO®link and DRIVE-CLiQ, offer integration with safety systems

Operate at High Speeds Without Performance Limitations

The AM34 absolute servo motor encoder redefines servo motor performance with its compact design and heat-free operation. It offers resolutions up to 20 bit singleturn and 12 bit multiturn.

Heat-Free Operation: Minimizing heat generation eliminates derating concerns, allowing servo motors to operate at peak speeds without performance limitations.
Flexible Mounting: Offers large mounting tolerances (±0.5 mm axial, ±0.1 mm radial), simplifying installation and ensuring precise alignment.
Advanced Integration: Features BiSS/SSI interface for seamless digital automation and electronic data sheet for streamlined installation, enhancing overall system efficiency.

Experience the difference with our advanced servo motor encoders and elevate your industrial operations to new heights of efficiency and performance.

Advanced Servo Motor Encoder Solutions

Precision and Functional Safety: ACURO® AD37 Encoder

Fast

Resistant

Flexible

Fast Data Transmission and High Accuracy

Functional Safety Encoders

Strong Performance in Compact Spaces: ACURO® AM34 Encoder

Precise

Compact

Robust

Operate at High Speeds Without Performance Limitations

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