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RG2/RG4 encoder series

Not recommended for new designs

What are RG2 and RG4 ?

RG2 and RG4 are the names given to the range of incremental encoder products that read 20 µm and 40 µm pitch scale types, as detailed in the links below:

RGH22 RGH41 optical encoders

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, RGH25F, RGH25F UHV, 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, RGH20F

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, RGH20FRGH40