Skip navigation

Optical encoders scale range

Linear scales

Gold plated ribbon

Gold scale FAQ

Scale name

Accuracy

Scale pitch

Thermal expansion

coefficient

Max length of scale

Readhead compatilibity

RGS

±15 µm/m

20 µm/40 µm

Thermally mastered to substrate by use of end clamps

For length >50 m, please contact Renishaw

RGH22, RGH24, RGH25F, RGH25F UHV, RGH34, RGH41

RGSZ/RGSN

As above

20 µm

As above

As above

TONiC, TONiC UHV

 

Glass spar

RGS40-G

Scale name

Accuracy

Scale pitch

Thermal expansion

coefficient

Max length of scale

Readhead compatilibity

RCLC

±3 µm

20 µm/40 µm

~8 µm/m/°C

130 mm

ATOM

RGS40-G

±4.2 µm/m

40 µm

As above

1.01 m

RGH40

Stainless steel ribbon

ATOM RTLF tracks angled

Scale name

Accuracy

Scale pitch

Thermal expansion

coefficient at 20 °C

Max length of scale

Readhead compatilibity

RTLF

40 µm (high accuracy): ±5 µm/m
40 μm: ±15 μm/m
20 μm: ±5 μm/m

20 µm/40 µm

10.1 ±0.2 µm/m/°C

10 m

 ATOM

 

Stainless steel ribbon with track option

FASTRACK RTLR scale

Scale name

Accuracy

Scale pitch

Thermal expansion

coefficient at 20 °C

Max length of scale

Readhead compatilibity

RTLC with optional FASTRACK

±5 µm/m

20 µm

10.1 ±0.2 µm/m/°C  

10 m

VIONiC, VIONiCplus,  TONiC, TONiC UHV

RTLA with optional FASTRACK

±5 µm/m

30 µm

As above

21 m

RESOLUTE, RESOLUTE UHV

RTLR with optional FASTRACK

±15 µm/m

40 µm

As above 

20 m

 RGH45

ZeroMet™ spar 

RELM linear scale with IN-TRAC reference mark

Scale name

Accuracy

Scale pitch

Thermal expansion

coefficient at 20 °C

Max length of scale

Readhead compatilibity

RELM/RELE

±1 µm for up to 1 m, then ±1 µm/m

20 µm

0.75 ±0.35 µm/m/°C

1.5 m

VIONiC, VIONiCplus, TONiC, TONiC UHV, SiGNUM

RELA

As above

30 µm

As above

1.5 m

 

RESOLUTE, RESOLUTE UHV

Stainless steel spar

RELM Invar scale

Scale name

Accuracy

Scale pitch

Thermal expansion

coefficient at 20 °C

Max length of scale

Readhead compatilibity

RSLM/RSLE/RSLC

±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

5 m

VIONiCVIONiCplusTONiC, TONiC UHV, SiGNUM

RSLR

As above

20 µm

As above

5 m

RGH20, RGH20F

RSLA

As above

30 µm

As above

5 m

RESOLUTE, RESOLUTE UHV

Rotary scales

Stainless steel ring

RESR 3 rings

Scale name

Graduation accuracy (depending on ring diameter)

Scale pitch

Ring diameter

Readhead compatilibity

RESR

 ±3.97 to ±0.38 arc seconds

20 µm/40 µm

52 to 550 mm

RGH20, RGH20F, RGH40

RESM/REST/RESD

As above

20 µm

As above

VIONiC, VIONiCplusTONiC, TONiC UHV, SiGNUM

RESA

As above

30 µm

As above

RESOLUTE, RESOLUTE UHV, RESOLUTE ETR

 

Ultra-high accuracy stainless steel ring 

REXM rings

Scale name

Installed accuracy (depending on ring diameter)

Scale pitch

Ring diameter

Readhead compatilibity

REXM/REXT

(≥100 mm diameter) ±1 arc second
(75 mm diameter) ±1.5 arc seconds
(≤57 mm diameter) ±2 arc seconds

20 µm

52 to 417 mm

VIONiCVIONiCplusTONiC, TONiC UHV, SiGNUM

REXA

As above

30 µm

As above

RESOLUTE, RESOLUTE UHV, RESOLUTE ETR

 

Glass disc

RCDM rotary discs various sizes (square)

Scale name

Graduation accuracy (depending on ring diameter)

Scale pitch

Ring diameter

Readhead compatilibity

RCDM

±0.5 µm

20 µm/40 µm

17 to 108 mm

 ATOM