All-in-one optical incremental encoder

29th July 2016
Posted By : Joe Bush
All-in-one optical incremental encoder

Launched as part of its VIONiC digital all-in-one encoder series, Renishaw’s new VIONiCplus combines all necessary interpolation and signal processing inside the readhead and eliminates the requirement for additional external interfaces. 

To this end, Renishaw developed a new Versatile Interpolation ASIC (VIA) chip to perform all of the functions originally executed by the interface. Other features, working in conjunction with the Advanced Diagnostic Tool (ADT), bring the end user wide ranging monitoring and diagnostic feedback.

The VIONiCplus incremental encoder is the culmination of research into the latest fine compensation architectures and advances in modern optimisation algorithms leading to unparalleled heights of performance. By leveraging advances in digital interpolation and signal processing techniques, Renishaw has built an encoder with Sub-Divisional Error (SDE) below ±10nm.

VIONiCplus is a conventional optical encoder that delivers the performance of ultra-fine pitch (<4µm) systems with the additional benefits of better yaw and ride height tolerance, easier installation, smaller system size, higher speeds more flexible scale options including longer lengths, better dirt immunity and lower cost.

An example application is scanning, for instance 3D LiDAR, which relies on precise constant velocity control of a rotary motor in order to limit measurement errors at long range. The VIONiCplus incremental encoder is well suited as it provides low SDE that minimises velocity ripple. Furthermore in motion control, the encoder’s high 2.5nm resolution and low 1.6nm RMS jitter reduce position settling time and increase stage repeatability.

The VIONiC series of incremental encoders has CE approval and is manufactured by Renishaw using strict quality controlled processes that are certified to ISO 9001:2008.


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