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RGH22 linear encoder system

Solid, reliable performance with resolutions to 50 nm, dual limits, integral set-up LED and unique filtering optics for excellent dirt immunity.

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RGH22The open, non-contact RGH22 readhead uses Renishaw's unique flexible 20 µm RGS20-S tape scale and offers resolutions to 50 nm.

 

 

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 RGH22 readhead features and benefits

  • Compact and robust readhead with internal interpolation offers industry standard digital and analogue outputs
  • Non-contact design offers high speed, reliable operation with zero friction and zero wear
  • Integral set-up LED enables easy readhead installation
  • Filtering optics guarantee excellent signal stability in conditions unsuitable for most open, optical encoders
  • The reference mark provides a repeatable home position whilst limits offer end of axis travel indication

Compare the RGH22 with alternative optical linear readheads.

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RGS20-S 20 µm pitch tape scale

Flexible scale on reel20 µm RGS20-S is manufactured from a thin flexible steel strip, which is gold plated to give high reflectivity and corrosion resistance. It may be mounted, using adhesive backing tape, to most engineering materials, including metals, ceramics, and composites.

  • Scale is supplied on a reel and can be cut to suit any axis length up to 70 m
  • RGS-S scale matches the thermal behaviour of the substrate it is affixed to, simplifying thermal compensation
  • Patented applicator tool enables fast and accurate scale installation
  • Lacquer coated scale is easy to clean and resistant to handling
  • 'Cut-to-measure' convenience ensures minimum waste and efficient inventory management
  • ±3 µm/m linearity enables high accuracy with simple compensation

Technical specifications

Readhead dimensions

16.0 mm x 44.0 mm x 27.0 mm  (H x L x W)
Outputs (resolution)

RS422: 5 µm, 1 µm, 0.5 µm, 0.1 µm, 50 nm.

Analogue: 1 Vpp, 12 µA 

Reference markMagnetic actuator 
Limit switchesSingle or dual limits
Maximum speed10 m/s 
Ride height tolerance

0.8 ±0.1 mm

Scale typesRGS20-S tape scale
Vacuum compatibleNo 

Additional resources

Accessories and external interpolation options.

For further information and product options, visit the encoder product configurator.

Data sheets

Drawings

News

  • News article: Breakthrough mobile technology relies on Renishaw encoders [157kB] News article: Breakthrough mobile technology relies on Renishaw encoders

    A revolutionary mobile phone antenna has been developed by UK company Sarantel, based on the company's patented PowerHelix™ technology. When other conductors or the user’s hand or head are next to the antenna, performance is completely unaffected, unlike conventional antennas. The unique manufacturing process uses a special purpose machine from Finnish company Citam Assembly Automatics Oy, fitted with Renishaw linear encoders to give very high accuracy.

  • News article: MYDATA take a different approach to the design of large-board SMT machines [177kB] News article: MYDATA take a different approach to the design of large-board SMT machines

    MYDATA is one of the world’s leading developers and suppliers of pick and place machines for the electronic industry, set apart from other manufacturers by the flexibility and fast change-over their machines offer. Its new generation of large-board machines has broken new ground, with recently integrated Renishaw linear encoders being key to the performance.

  • News article: Renishaw scales facilitate micro-machining research [123kB] News article: Renishaw scales facilitate micro-machining research

    Special equipment has recently been installed at the University of Southampton by Ionoptika Ltd., for research into one of the most demanding of applications; micro-machining. Among the highly specialised suppliers involved is Renishaw, whose RG2 scale and RGH25 UHV readheads provide the crucial means of positioning for the nanometric movements required. People outside this discipline often find it hard to comprehend just how minute such work is – for example, Ionoptika’s full company logo can be etched 20 μm wide on a typical metallic screen mask.

3D models (step format)

Next steps

Contact us online if you require more information or you have a pricing query, or alternatively you may like to speak directly to your local Renishaw office.