Incremental encoders

The incremental shaft encoders are designed with optical or magnetical principle or as single chip version. At the encoder outputs, two 90° phase-shifted rectangular signals are available with up to 10 000 impulses and an index impulse per motor revolution (3 channel version).

Optical Encoders

Function

Encoders of the IER3-10000 (L) series consist of a highresolution code disc that is attached to the motor shaft, a light source and a photo sensor with interpolator and driver stages. The light from the light source is refl ected or absorbed by the code disc. The refl ected light is collected by the photo sensor and the signal processed into a high-resolution encoder signal. With this, two square wave signals that are phase-shifted by 90 °e, as well as an index signal to display output shaft rotation, are available at the outputs. A Line Driver is also available as an option.

The high-precision optical encoders are ideally suited for position control.

Features and benefits

  • Very high resolution of up to 40 000 edges per revolution (corresponds to a 0,009° angle resolution)
  • Very high position accuracy, repeatability and high signal quality
  • Various resolutions available as standard feature
  • Insensitive to magnetic interference
Optical Encoders

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Magnetic Encoders

Function

Encoders of the IE3-1024 (L) series consist of a diametrically magnetized, two-pole sensor magnet which is fastened to the motor shaft. A special angle sensor for detecting the motor shaft position is positioned in an axial direction in relation to the sensor magnet. The angle sensor comprises all necessary functions, such as Hall sensors, an interpolator and driver stages. Analog signals of the sensor magnets are detected by the Hall sensors and, after suitable amplifi cation, passed along to the interpolator. By means of a special processing algorithm, the interpolator generates the high-resolution encoder signal. With this, two square wave signals that are phase-shifted by 90 °e, as well as an index signal to display output shaft rotation are available at the outputs.

Features and benefits

  • Compact modular system and robust housing
  • Various resolutions available as standard feature
  • Index channel for referencing a rotation of the drive shaft
  • Also available as Line Driver version
  • Standardized electronic encoder interface
  • Flexible customer-specifi c modifi cations including custom resolution, direction of rotation, index pulse width and index position are possible
Magnetic Encoders

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Integrated Magnetic Encoders

Function

The encoders of the IEH2-4096 and IEH3-4096 series consist of a multi-part magnetic ring, which is attached to the rotor, and an angle sensor. The angle sensor comprises all necessary functions, such as Hall sensors, an interpolator and driver stages. Analog signals of the sensor magnets are detected by the Hall sensors and, after suitable amplification, passed along to the interpolator. By means of a special processing algorithm, the interpolator generates the high-resolution encoder signal. With this, two square wave signals that are phase-shifted by 90 °e, with up to 4 096 lines per revolution, as well as one additional index signal are available at the outputs.

The encoder is integrated in the motors of the SR series and lengthens these by just 1,4 mm.

Features and benefits

  • Extremely compact
  • High resolution of up to 16 384 edges per revolution (corresponds to a 0,022° angle resolution)
  • No pull-up resistors are necessary at the outputs because there are no open collector outputs
  • Symmetric switching edges, CMOS and TTL-compatible
  • Different resolutions, according to encoder type, from 16 to 4 096 lines, are available for standard delivery
  • High signal quality

Integrated Magnetic Encoders

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