Rotary encoders shrink to 40mm diameter

Saving space in machine design, Pepperl+Fuchs has developed a range of 40mm-diameter incremental rotary encoders that offer a full range of mounting options.

With industrial applications, the requirements for the optimum design can differ from project to project.

However, for most applications, the compact dimensions of all the components will be important criteria.

For this reason, Pepperl+Fuchs has developed a range of incremental rotary encoders with a diameter of only 40mm.

Engineers are now able to choose between models with solid shaft, hollow shaft and partially hollow shaft, featuring extremely compact dimensions.

In today's competitive environment, companies can only survive if they strive for utmost efficiency or offer their customers added value to differentiate themselves from their competitors.

As the customer is often interested in reduced space requirements of a machine, modern designs are characterised by increasingly compact dimensions.

For engineers, it is not always an easy task, to realise all requirements within one machine.

Space efficient designs will always require highly compact components.

Offering the customer added value, usually leads to increasingly automated processes.

At the same time, future machine generations need to be designed for lower production costs, which also requires the use of components which contribute to lower costs without compromising performance.

Compact and cost-efficient sensors to detect a variety of physical dimensions are simply a must in modern machine design, and for rotating machinery the rotation angle and angular speed are amongst the most important process parameters that need to be detected.

In this field, the new generation of rotary encoders by Pepperl+Fuchs is able to considerably contribute to a higher level of efficiency.

The new T Series sensors combine characteristics, such as speed and compact design with a highly attractive price.

Where the primary focus is on smaller and more compact components, the use of incremental rotary encoders instead of the more powerful rotary encoders delivering absolute values represents vital advantages.

Due to their more complex design and the need to place all the interface logics directly into the sensor, absolute value sensors will always require considerably bigger dimensions.

Another advantage of incremental sensors over absolute sensors becomes evident in all applications where fast sensing without any time delay is required.

Due to the fact that there is no need for any time consuming encoding of the measured signal for transmission over a serial interface, incremental sensors are able to provide their signals in real time with virtually no delay.

All T Series rotary encoders feature a number of technical characteristics leading to a high level of reliability, long-time stability and utmost signal quality.

Besides models with compact dimensions, Pepperl+Fuchs also offers industry standard models with a diameter of 58 mm.

They feature a mechanical design resulting in superior vibration and shock resistance.

For the first time, these sensors also use coding discs made of metal instead of glass or plastics.

In combination with a new manufacturing technology, this allows economic production and results in sensors which are highly independent from the ambient temperature.

An opto-ASIC made in Germany guarantees a long lifecycle in combination with constantly high sensing quality.

All compact T Series models are available for up to 1024 increments per rotation and offer a maximum output frequency of 100kHz.

Compact 40mm diameter rotary encoders currently comprise the TVI40 with solid shaft, the TS140 with a partially hollow shaft and the THI40 with a totally hollow shaft.

This allows the combination of the rotary encoders from Pepperl+Fuchs with all established mounting options on the market.

In addition to the conventional solid shaft models, especially the new models with hollow shaft and partially hollow shaft will meet the interest of customers.

In comparison with solid shaft rotary encoders, their primary advantage is a simplified and faster assembly.

The customer only needs to attach the sensor directly to the rotating shaft of the machine and secure it with a clamping ring and a torque support against unwanted rotation.

As the speed sensor is fully supported by the shaft itself, there is no need for any linking device to compensate shocks and misalignment.

This represents another advantage over solid shaft rotary encoders.

The TVI40 with solid shaft is available with shaft diameters between 6 and 8mm.

The customer is able to choose between models with 0.5 or 2m-long cables.

The outer shell was especially developed for this model is made of plastic.

It features a flexible cable outlet which allows pinch-free wiring of the cable in axial, radial or tangential direction.

This makes the TVI40 the perfect choice for all applications with limited space, requiring a highly compact high performance sensor to securely detect the rotating angle.

The TSI40 with partially hollow shaft offers the option between shaft diameters of 4 or 6mm in combination with an insert depth of 15mm.

This makes this model a space saving option to be mounted at the end of any drive shaft.

A clamping ring is used to mount this incremental speed sensor on the shaft without causing any damage to the shaft.

With this sensor, the torque support to prevent the sensor from rotating with the shaft comes as a standard features.

Just as model TVI40, this speed sensor also is available with 0.5 or 2m-long cables.

As the versatile cover of the TVI40 has proved to be very practical, the TSI40 also comes with this feature.

It allows the user to route the cable in radial, axial and also tangential direction.

Speed sensor model THI40 features a completely hollow shaft.

This model is a new construction and replaces the former 81 Series.

It is available with diameters of 6mm, 8mm and 0.25in, offering the option of top or side clamping.

Like the other models, it is also equipped with a torque support preventing any unwanted rotating of the sensor.

The THI40 comes with a 2m long cable.

Contrary to the models with solid shaft or partially hollow shaft - which are equipped with a special plastic case for tangential cable connection - model THI40 features an aluminium case with only radial cable connection.

The incremental rotary encoders of the T Series need operating voltages between 4.75 and 30V DC.

Output signals provide track A and track B signals, a zero-terminal as well as the respective inverted values.

All outputs are short circuit proof and designed for loads up to 30mA.

Operating the units from 5V DC allows RS422 functionality.

Typical applications for these compact, fast and low-priced incremental rotary encoders are all situations where space is limited, such as packaging machines, forwarding systems and escalators.

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