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Renishaw launches next generation of digital encoders

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Renishaw launches next generation of digital encodersRenishaw is adding to its optical encoder range with the launch of the VIONiC series, a new family of ultra-high-accuracy, super-compact all-in-one digital incremental encoders.

Designed for demanding motion control applications, this development brings together Renishaw's renowned filtering optics with a new custom interpolation and monitoring ASIC (application-specific integrated circuit) that enhances dynamic signal processing and improves signal stability. This has enabled Renishaw to create its highest-performance incremental encoder system so far, at the same time combining all necessary interpolation and digital signal processing inside the readhead to eliminate the requirement for additional external interfaces.

The VIONiC range has been designed to reduce overall system size to the minimum achievable for a high-performance system, while delivering excellent performance in terms of cyclic error, jitter and accuracy. Customers can choose between two VIONiC readhead variants. The standard VIONiC readhead features a sub-divisional error (SDE) of <+/-30nm, a range of available resolutions from 5um to 20nm, and speeds beyond 12m/s. Alternatively, where performance requirements are even more demanding, customers can select the VIONiCplus read head with a claimed best-in-class SDE of <+/-10nm, low jitter to 1.6nm RMS and resolutions from 100nm down to 2.5nm. Low-SDE encoders are essential to minimise velocity ripple, which is important in constant-velocity applications such as laser scanning.

VIONiC series encoders are available with the same linear and rotary (angle) scale ranges as the TONiC series, so existing customers may choose to install VIONiC encoders as drop-in replacements. Available scale types include metal tape, spar and rotary rings (including ultra-high-accuracy REXM). All VIONiC scales come with customer-selectable IN-TRAC reference marks embedded in the incremental channel and dual limit switches in the case of linear scales.

Diagnostics

Ease of set-up and calibration is supported by an Advanced Diagnostic Tool (ADT), which includes user software for control and monitoring of the VIONiC's set-up and calibration routines. New software features include: enhanced graphics, automatically generated plots of signal strength vs position, Lissajous plots, DRO output and readhead pitch indication. This set-up tool is suitable for factory production-line installation as it provides remote, advanced calibration features.

The VIONiC incremental encoders are CE marked and are manufactured by Renishaw using strict quality-controlled processes that are certified to ISO 9001:2008 - and, like all Renishaw encoders, the VIONiC encoders are backed by a responsive global sales and support network. The VIONiC encoder series is available to order from August 2016.

For further information on VIONiC, go to www.renishaw.com/vionic.

 
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