The design of the magnetic Absolute Encoder from Pepperl + Fuchs is precisely designed for difficult environmental conditions. They deliver the highest precision in any industrial environment. Their design is compact, robust and does not require any mechanical components. More performance and more longevity, coupled with extremely high accuracy, bring applications ever closer to the goal of absolutely error-free processes. The article describes a series of predestined ones Applications

Pepperl Fuchs encoder

Contents

 

With the further development of magnetic encoder Pepperl+Fuchs has exceeded the limits of what was previously technically possible for use in particularly harsh operating conditions. The magnetic field technology now combines design-related robustness with high precision and dynamics. The ENA58IL, ENA36IL and 42H series define a new industry standard in the 0,1° performance class. The powerful encoders also impress with their new interfaces Ethercat, Profibus and Profinet and always offer a suitable solution even for demanding applications in general mechanical engineering.

Rotary encoder originally developed for adverse conditions

What today represents the benchmark for industry standard encoders was originally developed for use in the most adverse operating conditions. Magnetic, that is contactless working encoders have long offered adequate solutions where other encoder technologies fail due to extreme loads caused by dirt, vibration, shock, etc. Their advantage is that they do not have a mechanical transmission, which can wear out or require maintenance or service. These encoders provide reliable position values ​​unaffected by environmental influences:


Rotary encoder for axes on motors, machines and systems


This goes far beyond areas of application such as mobile equipment applications, Wind turbines and the like and also arouses desire in general mechanical engineering - especially since increasingly difficult environmental conditions, faster processes, etc. lead to ever higher loads on the production facilities and the components used in them. “So far, optical encoders have generally been used in this environment. They deliver the signals almost in real time and achieve a high level of accuracy. However, due to their complex mechanics, they can be sensitive to harsh environmental conditions such as dust, vibration or temperature fluctuations,” explains Stefan Horvatic, Head of Product Management at Pepperl+Fuchs Drehgeber GmbH.

Sensor combination creates new perspectives

However, conventional magnetic encoders have so far been neither fast nor accurate enough to provide the necessary performance in demanding industrial applications Signal quality to deliver. By further developing magnetic field technology, the automation company has exceeded the limits of what was previously possible and combined the robustness of magnetic encoders with high precision and dynamics. The powerful encoders of the ENA58IL, ENA36IL and 42H series work with an extremely effective magnetic detection principle that combines the established methods of Hall and Wiegand sensors.

With high precision and dynamics, these magnetic rotary encoders can now be used in applications in which previously only optical versions could determine the position. “With theirs fieldbus- And Ethernet variants", their compact designs and designs, including the heavy-duty version, the areas of application of the new series are so versatile that there is always a solution for standard requirements in general mechanical engineering," adds Horvatic.

The standards set by the new series are demonstrated by highly demanding applications from a wide variety of areas, from the printing industry to beverage bottling to robot applications or the 'flying saw' technology function. Which is mainly used for outdoor use heavy duty-Encoder version is the most compact in its class.

Security in the printing process

Printing machines are among the most complex machines. Only a few hundredths of a millimeter thin paper webs, which race through ink towers over countless rollers at up to 15 m/s, make the high demands on the required accuracy clear. The movements of the rollers must be precisely coordinated so that the paper does not tear or crease and the printing occurs in exactly the right place.


Encoder: Incremental, absolute and communicative


Rotary encoders that Roller speeds control, must be precise and are subject to strong vibrations. They also have to be resistant to dirt, as the inevitable paint and paper dust must not impair their function. With their high resolution and absolute accuracy of <0,1°, the magnetic encoders of the ENA58IL series guarantee the required high precision and process reliability.

Precisely positioned for filling

High speeds are also in modern ones Beverage bottling plants usual. Up to 90.000 cans or bottles per hour are filled with juice, beer, sparkling water, etc. here. The precise positioning of the containers under the filling nozzles is crucial for a reliably functioning process. If this is not guaranteed, products will be lost. In addition, the misdirected liquids can get into parts of the system and contaminate them, which causes additional cleaning work but also puts enormous strain on the system components.

The wear-free Thanks to their accuracy, rotary encoders from the ENA58IL series reliably ensure the precise positioning of the containers in the highly dynamic filling process. Their robust design means they meet the high requirements of the food industry.

Especially compact for tight spaces

In the area of ​​the axes for Industrial robots Until now, manufacturers have been spoiled for choice when it comes to choosing the right encoder: precise or robust or compact. Rotary encoders record the movement of the individual axes of an industrial robot. They thus provide the basis for determining its position. Especially with smaller robots for low payloads, the internal workings can be very tight. The encoder sizes ENA36IL with their particularly compact housing of just 36 mm have proven themselves in such applications. They also achieve accuracies of <0,1° and offer a resolution of up to 16 bits.

Position data acquisition in flight

The so-called encoder applications are also highly demanding Flying saw. As a technology function for machining processes in continuous material flow, it can be found in a wide variety of application areas and in almost all industries. It is not only used in its classic areas with saw blades, knives or scissors of various types.

From stamping, drilling or filling to synchronous material transport, this function allows a wide range of processes to be carried out. Synchronizing the feed axes becomes a challenge, especially with fast movements. The 0,1° performance class from Pepperl+Fuchs of the magnetic absolute encoder meet the high requirements for precision and dynamics. At the same time, the robust magnetic field technology is suitable for the most harsh operating conditions.

Extremely robust in outdoor use

For particularly harsh conditions, for example in outdoor use Commercial vehicles or mobile equipment, the heavy-duty rotary encoder 42H is ready. These are primarily used in more demanding applications such as positioning booms on crane vehicles. Security and accuracy play an important role here.

Is the movement of the crane boom too far, people and machines can quickly be damaged. The 42H encoders ensure the position of the crane boom is determined even under high levels of shock and vibration. The wear-free magnetic field technology offers absolute reliability and a long service life under the toughest conditions. Among the most compact heavy-duty encoders in their class, they can be easily integrated into mobile machines.

New industry standard with a variety of variants



The ENA58IL are the first magnetic encoders to work with one Accuracy of <0,1° and resolution of up to 32 bits as a multiturn encoder. Since the analog signal is picked up directly and fed to the output without any detours, the ENA58IL offers a dynamic response based on the cycle time of <80 µs. This means that these encoders can also be used in high-speed applications such as in the printing presses already described.

The compact and robust construction A wide variety of variants, with all common electrical and mechanical interfaces - coupled with the latest magnetic scanning technology - make the ENA58IL the new industry standard for rotary encoders. The highlights are the fieldbus and Ethernet variants. With SSI, Profibus, Profinet and Ethercat, the encoder series offers a very wide range of applications in any industrial environment. The highly developed magnetic field technology even fits into small housings with a diameter of just 36 mm.

The ENA36IL series includes the most compact encoder of its kind. They are ideal for confined spaces such as in industrial robot axes. The heavy-duty version 42H is also one of the most compact encoder versions. Even the most adverse environmental conditions with extreme shock and vibration loads and high bearing loads are no problem.

With the extremely robust construction, a sealing concept that can... IP69K approved and a stainless steel housing, the 42H are used wherever high reliability counts under extreme environmental conditions. With the CANopen, J1939, analog and SSI interfaces, this encoder series is suitable for use in mobile construction machinery, paper mills or crane systems

FAQ

How does an absolute encoder work?

An absolute value encoder, also called Absolute encoder called, works by providing a unique encoding for each angular position of a rotation. In contrast to incremental encoders, which only count movement, the absolute encoder can determine the exact position even after a power failure without reference travel.

There are two main types: Singleturn and multiturn-Absolute encoder. Singleturn absolute encoders measure the angular position within a single revolution. They provide a unique code for each position within that revolution. Multiturn absolute encoders, on the other hand, can also record the number of complete revolutions.

Modern absolute value encoders often use IO-Link-Communication, a standardized technology that facilitates integration into automated systems. Through IO-Link, absolute encoders can send valuable data such as the exact angular position and number of revolutions directly to control systems, which is essential for precise control and positioning tasks in industrial automation.

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