Absolute rotary encoders

Each angular position has a unique code, which means the absolute position is known at all times, even without a reference run. This is a particularly important if the machine or rotary encoder is not continuously powered and the exact position is required immediately. We offer two different series here: the ES series (single-turn) and the EM series (multi-turn). Both provide values in either binary or Gray code via an SSI or fieldbus interface, with the appropriate bit resolution. This section is currently under construction and is being constantly expanded.

Sensor solutions for absolute angular positioning

Rotary encoders for detecting rotational movements and positioning in machines and systems

Rotary encoders accurately detect rotational position and speed, offering versatile solutions for a wide range of automation applications. Either incremental or absolute rotary encoders can be used depending on the application requirements. The areas of application range from intralogistics and robotics to packaging and wood processing, as well as machine tools and the automotive industry.

The products are manufactured and tested according to high European quality standards and are available worldwide. Key features include a wide range of resolutions, a high permissible axial load, as well as easy handling and commissioning.

Advantages for you

High product quality: A wide selection of sensors with high resolution and signal quality, manufactured to European quality standards and designed to withstand high vibration and axial loads.
Global support: Reliable assistance from Leuze Support – from product selection to integration with the control system.
Tailored solutions: The right sensor solution for every application – tailored to individual requirements and environmental conditions for reliable measurement results and high process reliability.
Cost-saving combined solutions Sensors for measurement and positioning tasks involving linear and rotary movements can be considered together and bundled as a coordinated solution.
Fewer suppliers: Precise positioning solutions from a single source

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Application

Absolute Encoder zur Steuerung des Wickelkopfes um eine passgenaue Folierung vorzunehmen

Packaging: Control of the winding head’s speed and revolutions

Requirement:

For automated film wrapping for transport protection, the winding head’s speed and number of revolutions must be controlled to ensure the film fits precisely around the load.

Solution:

An EM 050 series absolute rotary encoder transmits the position values to the motor controller via the appropriate interface, depending on the desired resolution. This ensures precise speed control and, with the multiturn version, that the number of cycles is recorded.
Various mounting variants are available for different shafts and resolution requirements.

Absolute Encoder zur Synchronisation und Steuerung der Geschwindigkeit eines Füllsterns in Abfüllanlagen

Packaging: Synchronization and speed control of a filling star in a filling system

Requirement:

Transferring bottles from a single-lane linear conveyor to rotating system parts, such as fillers or cappers, requires precise synchronization of the filling star’s rotational speed. At the same time, the sensor used must meet the high cleaning requirements in filling systems.

Solution:

An ES series rotary encoder, mounted on the axis of the bottle-holding wheel, detects the rotational movement at the required resolution and enables precise speed adjustment. The direct connection to the drive, for example via an SSI interface, simplifies integration into the system control.

Absolute Encoder zur Positionierung der Hubvorrichtung eines Staplers

Intralogistics: Positioning a lift truck’s lifting device

Requirement:

To control a lift truck’s lifting device, the fork’s position must be detected unambiguously and reliably – even immediately after being switched on, without a prior reference run.

Solution:

A compact absolute rotary encoder with a hollow shaft can be flanged to the drive shaft at the lower end of the lifting device or at the rear end of the fork to save space. It detects the position directly and enables reliable control of the lifting motion without the need for referencing after startup. Various interfaces are available for connecting to the drive or the vehicle control system.

Absolute Encoder zur Wickelsteuerung an Metallcoils und Materialrollen

Metal processing and packaging: Winding/unwinding control for metal coils and material rolls

Requirement:

To ensure error-free material supply and pick-up, the rotational speed of the roll must be precisely controlled. The rotational speed must be adjusted based on the fill level to ensure a constant material flow. To achieve this, both the rotational speed and the number of revolutions must be detected to trigger the roll change at the correct time.

Solution:

A rotary encoder can usually be flanged directly onto the driven roller axle. An EM series multiturn rotary encoder detects both rotational speed and the number of revolutions and provides the necessary data to the control system via the appropriate interface. A range of mounting variants and connection options allow flexible integration into the system.

Absolute Encoder zur Raederpositionierung fuer die Lenksteuerung von AMR

Intralogistics: Wheel positioning for AMR steering control

Requirement:

For precise path control of autonomous vehicles, both the angular position of the steered wheels and the rotational speed must be continuously detected. The current steering position must be available at all times without the need for a reference run.

Solution:

An ES series absolute rotary encoder mounted on the swivel casters’ rotatable mount continuously detects the current steering position and transmits it to the vehicle control system. This allows precise control of the direction of travel. Another rotary encoder on the drive axle measures the rotational speed and enables targeted adjustment of the vehicle’s speed along the path.

Absolute Encoder zur Biegekopfsteuerung an Rohrbiegemaschinen

Machine tools: Bending head control on a pipe bending machine

Requirement:

For precise bending processes in pipe production, the angle and position of the bending axis must be accurately detected and controlled. Continuous and reliable process control is crucial for consistent production quality.

Solution:

An ES series absolute rotary encoder detects the angular position of the bending axis with high accuracy and enables precise control of the bending process. Different resolutions and interfaces provide flexibility in adapting to specific requirements – even for manufacturing precision components. A range of mounting variants also allows easy integration into the machine.