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Laser encoder FAQs


What should I use to clean the optics on my laser encoder system?

The following table highlights what can and cannot be used:

Do useDo not use
Ethanol, methanol, propanol and combinationsAcetone
Spectacle cleaning fluidAbrasive materials
Non-abrasive, lint-free cleaning wipesChlorinated solvents
Microfibre clothsBenzine

Is it possible to supply a calibration certificate for my laser encoder system?

Yes, these can be specified when ordering a new system. Please ntoe that there is an additional charge for this service.

I have lost my calibration certificate, is it possible to provide a replacement?

Yes, this is possible. Please contact your local Renishaw office and advise them of the serial number. Please note that there is an additional charge for this service.


Should I use a plane mirror or retroreflector target within my applications?

The choice of target does depend on the application type as each have their own advantages. A plane mirror is more suitable for XY stage applications. Retroreflectors are more tolerable to angular rotation than plane mirrors and are typically used on linear axes.

Why is the axis status LED still red when the RLE system is aligned?

RLE systems are supplied as default with the RLU dip switch settings set to 'error', therefore these need to be configured prior to use (including the parity switch).

What is the highest resolution that can be achieved with an RLE system?

When combining the RLE with the RPI20, it is possible to achieve a resolution of 38.6 pico-metres at 1 m/s.

What connectors do I need for integrating my RLE system?

When an RLE system is supplied from new, it includes a connector kit which includes all of the relevant connectors.

What mirrors do Renishaw recommend for use with its RLE systems?

Renishaw offers its own range of mirrors. The data sheet contains the relevant information for you to source your own custom mirrors if required.


Is it possible to have an HS10 system repaired?

Unfortunately Renishaw is no longer able to support HS10 units (as of January 2016) due to component obsolescence. However, Renishaw does have an upgrade option for HS20 at a reduced price. Please contact your local Renishaw office to find out more.

What level of accuracy can be achieved with HS20?

HS20 is capable of achieving an accuracy of 1 ppm (1 µm/m).

What alternative compensation options do Renishaw offer?

Through the RCU10 it is possible to compensate for the air temperature, pressure and humidity. In addition, there is functionality to compensate for the growth in either the work-piece or machine structure from thermal expansion.

What is the maximum range of the HS20?

HS20 is capable of achieving a maximum range of 60 m when used with the long range optics kit.

What are the output options for HS20?

HS20 has both digital incremental (RS422 digital quadrature) and analogue incremental (1 Vpp – differential sine and cosine) options.


Are Renishaw's laser encoder systems RoHS compliant?

Renishaw laser encoder products were compliant from June 2017. The corresponding declarations of conformity (DOC) can be found on our product quality and conformance page.

Do Renishaw encoders comply with EU legislation (CE declarations of conformity)?

Please refer to the Product quality and conformance page.

Next steps

If you are unable to find an answer here, please submit your question using the email enquiry form or contact your nearest regional office.