ENCODER DYNAPAR PDF

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Rotary encoders come in 3 major mounting styles: hollow-shaft hollow-bore or through shaft , hub-shaft hub-bore or shafted. Hollow-shaft and hub-shaft rotary encoders mount directly to a motor shaft typically using a tether. Shafted rotary encoders mount using a flexible coupling. Single turn absolute encoders output codes that are repeated every full revolution and do not output data to indicate how many revolutions have been made. Multi-turn absolute encoders output a unique code for each shaft position through every rotation, up to 4, revolutions.

Unlike incremental encoders, absolute encoders will retain correct position even if power fails without homing at startup. Dynapar offers both optical and magnetic incremental encoders in 4 mounting options: shafted with coupling, hollow-shaft, hub-shaft or bearingless.

Single channel incremental encoders can measure speed which dual channel or quadrature encoders AB can interpret direction based on the phase relationship between the 2 channels.

Indexed quadrature encoders ABZ are also available for homing location are startup. Optical encoders work by shining a light source through a patterned disc that is read by a photo-detector. Optical encoders engines can be implemented as incremental or absolute encoders and are available in various mounting styles.

Combined with encapsulated electronics, magnetic rotary encoders are extremely robust, can handle extreme temperatures, shock, vibration and ideal for environments with dirt, dust and oil. Dynapar offers incremental magnetic rotary encoders with up to 2, PPR resolution and absolute models with up to 16 bit multi-turn resolution.

Hollow-shaft encoders can be directly mounted to a motor shaft and affixed using a flexible tether or torque arm to prevent the encoder from rotating. Hollow-shaft encoders are easier to install than shafted encoders, eliminating the need for a coupling and do not require motor shaft alignment with respect to the encoder.

Hub-shaft encoders are ideal for direct mounting in limited space and offer improved sealing with no opening on the back of the encoder. Hub-shaft encoders are mounted with a tether point to prevent free encoder rotation and a plastic sleeve or insert is typically used to isolate the encoder from motor shaft current. By changing the coupling, shafted encoders can be matched with a variety of motors, even non-standard or older motors.

The coupling can also provide electrical isolation from the motor and absorb shaft movement or compensate for shaft misalignments making shaft encoders ideal for strenuous applications.

The shaft coupling is usually covered with a bracket or "flower-pot" mounting fixture to provide support and protect the coupling. Several super-compact modular encoders for small servo and stepper motor feedback are also available designed to replace size 10, 11, 15 resolvers in motor applications. Models with h phased array sensor technology allows for axial shaft play and provide high performance encoder feedback in high shock or vibration environments.

Dynapar also offers miniature encoders designed with wide operating temperature ranges and various PPRs up to 5, PPR and commutation track or pole options. Intrinsically safe encoders are used in conjunction with a barrier which limits the energy in the encoder so that any arcs or sparks do not have enough energy to ignite.

Dynapar also offers encoders with encapsulated electronics which have their components encased in resin. Designed with the form factor of a traditional proximity sensor, our non contact encoders or non contact rotary sensors can offer position data. A wide sensing envelope and means design flexibility and allows for the sensor to work even the magnet is misaligned or offset from the sensor.

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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. Learn more about incremental rotary encoders here How do rotary encoders work? Rotary encoders translate the mechanical rotational motion of an object such as a motor shaft into an electronic signal.

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