Optical encoders scale range

Renishaw supplies linear, partial arc and rotary (angle) encoder scales, manufactured using robust processes certified to ISO 9001:2015. A wide range of scales types, including rugged scale, high-accuracy scale and low expansion scale, provide options for every type of application.

Linear scales

RTL (stainless steel tape)

Scale name	Accuracy	Scale pitch	Coefficient of thermal expansion at 20 °C	Supplied length	Readhead compatibility
RTLF-S	20 μm: ±5 μm/m 40 µm (high accuracy): ±5 µm/m 40 μm: ±15 μm/m	20 µm/40 µm	10.1 ±0.2 µm/m/°C	Up to 10 m (> 10 m on request)	ATOM, ATOM DX
RTLC-S	20 μm: ±5 μm/m 40 µm (high accuracy): ±5 µm/m 40 μm: ±15 μm/m	20 µm/40 µm	10.1 ±0.2 µm/m/°C	Up to 10 m (> 10 m on request)	VIONiC , QUANTiC , TONiC
RTLA-S	30 μm: ±5 µm/m 50 μm: ±10 µm/m	30 µm/50 µm	10.1 ±0.2 µm/m/°C	RESOLUTE: up to 21 m EVOLUTE: up to 10.02 m	RESOLUTE, EVOLUTE

RTL FASTRACK™ (stainless steel tape with track option)

Scale name

Accuracy

Scale pitch

Coefficient of thermal expansion at 20 °C

Supplied length

Readhead compatibility

RTLC with optional FASTRACK

20 μm: ±5 μm/m

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

20 µm/40 µm

10.1 ±0.2 µm/m/°C

Up to 10 m (> 10 m on request)

VIONiC, QUANTiC, TONiC

RTLA with optional FASTRACK

30 μm: ±5 µm/m

50 μm: ±10 µm/m

30 µm/50 µm

10.1 ±0.2 µm/m/°C

RESOLUTE: up to 21 m

EVOLUTE: up to 10.02 m

RESOLUTE, EVOLUTE

RKL (narrow stainless steel tape)

Scale name	Accuracy	Scale pitch	Coefficient of thermal expansion	Supplied length	Readhead compatibility
RKLC-S, RKLR-S	20 μm: ±5 μm/m 40 µm (high accuracy): ±5 µm/m 40 μm: ±15 μm/m	20 µm/40 µm	Matched to substrate material when scale ends are fixed with end clamps	Up to 20 m (> 20 m on request)	VIONiC, TONiC, QUANTiC
RKLF-S	20 μm: ±5 μm/m 40 µm (high accuracy): ±5 µm/m 40 μm: ±15 μm/m	20 µm/40 µm	Matched to substrate material when scale ends are fixed with end clamps	Up to 10 m (> 10 m on request)	ATOM, ATOM DX
RKLA-S	±5 μm/m	30 µm	Matched to substrate material when scale ends are fixed with end clamps	Up to 21 m	RESOLUTE

REL (ZeroMet™ spar)

Scale name	Accuracy	Scale pitch	Coefficient of thermal expansion at 20 °C	Supplied length	Readhead compatibility
RELM20/RELE20	±1 µm for up to 1 m, then ±1 µm/m	20 µm	0.75 ±0.35 µm/m/°C	Up to 1.5 m	VIONiC, TONiC
RELA30	±1 µm for up to 1 m, then ±1 µm/m	30 µm	0.75 ±0.35 µm/m/°C	Up to 1.5 m	RESOLUTE

RSL (stainless steel spar)

Scale name	Accuracy	Scale pitch	Coefficient of thermal expansion at 20 °C	Supplied length	Readhead compatibility
RSLM20/RSLE20/RSLC20	±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	VIONiC, TONiC
RSLA30	±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	30 µm	10.1 ±0.2 µm/m/°C	Up to 5 m	RESOLUTE

RCL (glass spar)

Scale name	Accuracy	Scale pitch	Coefficient of thermal expansion	Supplied length	Readhead compatibility
RCLC	±3 µm	20 µm/40 µm	~8 µm/m/°C	Up to 130 mm	ATOM, ATOM DX

Partial arc scales

RKL (narrow stainless steel partial arc tape)

Scale name	Accuracy	Scale pitch	Coefficient of thermal expansion at 20 °C	Supplied length	Readhead compatibility
RKLC-S	20 μm: ±5 μm/m 40 μm: ±15 μm/m	20 µm/40 µm	10.1 ±0.2 μm/m/°C	Up to 20 m (> 20 m on request)	VIONiC, TONiC, QUANTiC
RKLF-S	±15 μm/m	40 µm	10.1 ±0.2 μm/m/°C	Up to 10 m (> 10 m on request)	ATOM, ATOM DX
RKLA-S	±5 μm/m	30 µm	10.1 ±0.2 μm/m/°C	Up to 21 m	RESOLUTE

Rotary scales

RES (stainless steel ring)

Scale name

Typical installed accuracy* (depending on ring diameter)

Scale pitch

Coefficient of thermal expansion at 20 ºC

Ring diameter

Readhead compatibility

RESM

(300 mm diameter) ±3.1 arc second
(150 mm diameter) ±5.5 arc seconds
(75 mm diameter) ±9.5 arc seconds

20 µm/40 µm

15.5 ±0.5 µm/m/°C

52 mm to 550 mm

VIONiC, TONiC, QUANTiC

RESA30

(300 mm diameter) ±3.1 arc second
(150 mm diameter) ±5.5 arc seconds
(75 mm diameter) ±9.5 arc seconds

30 µm

15.5 ±0.5 µm/m/°C

52 mm to 550 mm

RESOLUTE

* 'Typical' installations are a result of graduation and installation errors combining and, to some magnitude, cancelling.

REX (ultra-high accuracy stainless steel ring)

Scale name

Typical installed accuracy* (depending on ring diameter)

Scale pitch

Coefficient of thermal expansion at 20 ºC

Ring diameter

Readhead compatibility

REXM20/REXT20

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

20 µm

15.5 ±0.5 µm/m/°C

52 mm to 417 mm

VIONiC, TONiC

REXA30

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

30 µm

15.5 ±0.5 µm/m/°C

52 mm to 417 mm

RESOLUTE

* 'Typical' installations are a result of graduation and installation errors combining and, to some magnitude, cancelling.

RCDM (glass disc)

Scale name	Scale pitch	Coefficient of thermal expansion at 20 ºC	Disc outer diameter	Readhead compatibility
RCDM	20 µm/40 µm	~8 µm/m/°C	17 mm to 108 mm	ATOM, ATOM DX

Legacy scales (not recommended for new design)

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