RGH22 encoder system

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

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.

RGS20-S 20 µm pitch tape scale

20 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

Additional resources

Accessories and external interpolation options.

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