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RG2/RG4 encoder series

What are RG2 and RG4 ?

RG2 and RG4 are the names given to a range of incremental encoder products that read 20 µm and 40 µm pitch scale types. These encoder products are not recommended for new designs. Some are currently being made obsolete but are available for Last Time Buys, as detailed in the links below:

RGH22 RGH41 optical encoders

Not recommended for new designs

Gold plated tape

Scale name

Accuracy

Scale pitch

Coefficient of thermal expansion

Supplied length

Readhead compatibility

RGS

RGS20-S scale

±15 µm/m

20 µm/40 µm

Thermally mastered to substrate by use of end clamps

Up to 50 m (>50 m contact Renishaw)

RGH22, RGH24, RGH34, RGH41

Glass spar

Scale name

Accuracy

Scale pitch

Coefficient of thermal expansion

Supplied length

Readhead compatibility

RGS40-G

RGS40-G scale

±4.2 µm/m

40 µm

~8 µm/m/°C

Up to 1.01 m

RGH40

Stainless steel tape with track option

Scale name

Accuracy

Scale pitch

Coefficient of thermal expansion at 20 °C

Supplied length

Readhead compatibility

RTLR40 with optional FASTRACK™

RTLR40 FASTRACK scale

±15 µm/m

40 µm

10.1 ±0.2 µm/m/°C

Up to 10 m

RGH45

Stainless steel spar

Scale name

Accuracy

Scale pitch

Coefficient of thermal expansion at 20 °C

Supplied length

Readhead compatibility

RSLR20

RSLR scale

±1.5 µm up to 1 m, ±2.25 µm up to 2 m, ±3 µm up to 3 m, ±4 µm up to 5 m

20 µm

10.1 ±0.2 µm/m/°C

Up to 5 m

RGH20

Stainless steel ring

Scale name

Graduation accuracy

(depending on ring

diameter)

Scale pitch

Coefficient of thermal expansion at 20 °C

Ring diameter

Readhead compatibility

RESR

RESR scale (scale page)


±3.97 to ±0.38 arc seconds

20 µm/40 µm

15.5 ±0.5 µm/m/°C

52 to 550 mm

RGH20, RGH40

Last Time Buy (LTB) products

The products below are being made obsolete with a Last Time Buy (LTB) option as follows:

  • RGH20F encoder readheads: 26th November 2021
  • RGH25F encoders readheads: 26th November 2021
  • REF interfaces: 26th November 2021
  • REB interfaces: 26th November 2021

Obsolete products

The products below are now obsolete and no longer available to order:

  • RGH25F UHV encoder readheads