Posts Tagged ‘Absolute Encoder’

Dynapar announces the introduction of the NorthStar HDN and HDP series of shaft-less encoders.

The new encoders feature true non-contact sensing technology that eliminates encoder shafts, bearings, and seals. As a result, the encoder is highly reliable, compact, completely sealed, and easy to integrate into existing applications.

Coupling With “Air”: Unlike traditional encoders that require some form of shaft and bearing assembly, the NorthStar HDN and HDP encoders use magnetic coupling technology to eliminate the need for these components. The encoders are supplied with a “target” magnet in the form of a bolt or collar which can be affixed to the rotating shaft or equipment that requires position or speed sensing. In application, the target magnet need only be placed in relatively close proximity to the encoder, meaning a wide sensing envelope is possible. This allows for virtually maintenance-free operation, eliminating alignment issues that can cause coupling breakage, bearing damage, and seal wear.

Completely Sealed: Since there’s no shaft protruding from the encoder, there’s no seal. Elimination of this potential ingress point is a welcome benefit especially when dealing with washdown or very dirty environments. In addition, the electronics are completely sealed and encapsulated in a clear potting compound which allows visibility of status LED’s that monitor signal output. The encoder is rated for up to IP68 environmental protection depending upon the connector chosen.

Incremental or Absolute Output: Unlike many competitive encoders, the NorthStar HDN and HDP encoders are available in either incremental or absolute output format. Absolute single-turn resolution of 13 bits is standard on the HDN58, with a choice between analog 0-5VDC output or CAN Bus interface. Standard incremental quadrature output with or without complements is available up to 2048PPR depending upon model.

Price and Availability: The HDN58, HDP30, and HDP18 encoders are built to order and immediately available for the general market. List pricing starts at $299 for the HDN series, $319 for the HDP18 series, and $369 for the HDP30 series, which features the form factor of a proximity sensor.

Click below on the model of your choice for specifications.

HDN58 Specifications	HDP30 Specifications	HDP18 Specifcations

Now available through parent company HEIDENHAIN Corporation is the Leine & Linde 600 Series (a highly robust ø 58 mm fieldbus encoder series), now with DeviceNet™.

This support for fieldbus interfaces extends the range of applications for this already useful absolute rotary encoder. Field bus interfaces based on Ethernet, PROFIBUS or CAN are examples of the communication protocols often used in automation. These interfaces are available on the Model 600 Series absolute coded singleturn or multiturn encoders.

This Leine & Linde series supports 13-bit singleturn or 25-bit multiturn with screw terminal or miniature M12 connection. Mechanically, various shafted- and hollow-shafted versions are available. The DeviceNet™ encoder supports encoder profile revision 2 and the functionality has been fully tested in compliance with the ODVA conformance test.

Overall, fieldbus technology is rapidly gaining acceptance and integration into automation applications worldwide. Based on network topology, system requirements and performance, various types of fieldbus systems are available, all developed and supported by individual standardization organizations. The key principle of fieldbus technology is to enhance device functionality, achieve communication transparency, simplify and standardize installations, as well as limiting the installation and maintenance costs. Sensors, like encoders, with support for various fieldbus interfaces have been available for several years and are increasingly gaining in acceptance and installed market share.

Leine & Linde is well known worldwide for offering high quality, heavy duty encoders of both the incremental and absolute types, are noted for their product robustness and designed to cope with the harshest of environments, such as those with high vibration, dirt and cold temperatures. These heavy, severe duty encoders are suited for drive and measurement applications and are often found in industries such as pulp and paper, forest and wood processing, agriculture, aggregate and mining equipment.

For further details on the Ruggedized Shaft Encoder check out the 607-608 RSA Data Sheet and Hollow Shaft Encoders are also available 607-608 RHA Data Sheet