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RESOLUTE™ encoder series

The RESOLUTE™ true-absolute encoder is a high-speed fine-resolution position measurement system. Position is acquired immediately on start-up, without requiring any motion, offering smooth velocity control and dependable positional stability.

Combining advanced optics with innovative position determination algorithms, the RESOLUTE encoder measures absolute position with fine resolutions down to 1 nm and high speeds up to 100 m/s. This delivers exceptional metrology performance such as low Sub-Divisional Error (SDE) of ±40 nm and ultra-low noise (jitter) of less than 10 nm RMS, suitable for the most demanding motion control challenges.

RESOLUTE encoders are available with linear and rotary scales with a variety of serial interfaces. Application-specific variants including RESOLUTE UHV (Ultra-High Vacuum), RESOLUTE ETR (Extended Temperature Range) and RESOLUTE FS (Functional Safety) are compatible with the optional Advanced Diagnostic Tool ADTa-100 and ADT View software, which acquire comprehensive real-time encoder data allowing optimisation and in-field fault finding.

Website cameo: RESOLUTE readhead

True-absolute position measurement

Absolute pictogram

The RESOLUTE encoder series provides absolute position measurement from single-track linear and rotary scales. Position is acquired immediately on start-up without requiring any motion.


High speed and fine resolution

Speed pictogram

RESOLUTE encoders combine advanced optics with innovative position determination algorithms to measure absolute position with fine resolutions down to 1 nm and high speeds up to 100 m/s (36 000 rpm).


Excellent metrology performance

Sub-Divisional Error (SDE) pictogram

RESOLUTE encoder systems provide absolute position measurement with low Sub-Divisional Error (SDE) of ±40 nm and ultra-low noise (jitter) of less than 10 nm RMS, resulting in smooth velocity control performance and dependable positional stability.

Find your RESOLUTE scale option

Standard

Linear

Scale type

Scale name

Accuracy

Scale pitch

Thermal expansion coefficient at 20 °C

Supplied length

RTLA FASTRACK scale

Stainless steel tape with track option


RTLA30 with optional FASTRACK™

±5 µm/m

30 µm

10.1 ±0.2 µm/m/°C

Up to 21 m


Narrow stainless steel tape

RKLA linear scale

RKLA30-S

±5 µm/m

30 µm

Matched to substrate material when scale ends are fixed with end clamps

Up to 21 m

ZeroMet™ spar

RELA scale

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

Stainless steel spar

RELA scale

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

Partial arc

Scale type

Scale name

Accuracy

Scale pitch

Thermal expansion coefficient at 20 °C

Supplied length

Narrow stainless steel partial arc tape

RKLA partial arc scale

RKLA30-S

±5 μm/m


30 µm

Matched to substrate material when scale ends are fixed with end clamps

Up to 21 m

Rotary

Scale type

Scale name


Accuracy

(depending on ring diameter)

Scale pitch

Thermal expansion coefficient at 20 °C

Ring diameter

Stainless steel ring

RESA scale (scale page)

RESA30


Graduation accuracy: 4 to 0.4 arc seconds

30 µm

15.5 ±0.5 µm/m/°C

52 to 550 mm


Ultra-high accuracy stainless steel ring

REXA scale (scale page)

REXA30

Installed accuracy:

(≥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 to 417 mm

Ultra-High Vacuum

Linear

Scale type

Scale name

Accuracy

Scale pitch

Thermal expansion coefficient at 20 °C

Supplied length

RTLA FASTRACK scale

Stainless steel tape with track option


RTLA30 with optional FASTRACK™

±5 µm/m

30 µm

10.1 ±0.2 µm/m/°C

Up to 21 m


ZeroMet™ spar

RELA scale

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

Stainless steel spar

RELA scale

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

Rotary

Scale type

Scale name


Accuracy

(depending on ring diameter)

Scale pitch

Thermal expansion coefficient at 20 °C

Ring diameter

Stainless steel ring

RESA scale (scale page)

RESA30


Graduation accuracy: 4 to 0.4 arc seconds

30 µm

15.5 ±0.5 µm/m/°C

52 to 550 mm


Ultra-high accuracy stainless steel ring

REXA scale (scale page)

REXA30

Installed accuracy:

(≥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 to 417 mm

Extended Temperature Range

Rotary

Scale type

Scale name


Accuracy

(depending on ring diameter)

Scale pitch

Thermal expansion coefficient at 20 °C

Ring diameter

Stainless steel ring

RESA scale (scale page)

RESA30


Graduation accuracy: 4 to 0.4 arc seconds

30 µm

15.5 ±0.5 µm/m/°C

52 to 550 mm


Ultra-high accuracy stainless steel ring

REXA scale (scale page)

REXA30

Installed accuracy:

(≥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 to 417 mm

Functional Safety

Linear

Scale type

Scale name

Accuracy

Scale pitch

Thermal expansion coefficient at 20 °C

Supplied length

RTLA FASTRACK scale

Stainless steel tape with track option


RTLA30 with optional FASTRACK™

±5 µm/m

30 µm

10.1 ±0.2 µm/m/°C

Up to 21 m


ZeroMet™ spar

RELA scale

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

Stainless steel spar

RELA scale

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

Rotary

Scale type

Scale name


Accuracy

(depending on ring diameter)

Scale pitch

Thermal expansion coefficient at 20 °C

Ring diameter

Stainless steel ring

RESA scale (scale page)

RESA30


Graduation accuracy: 4 to 0.4 arc seconds

30 µm

15.5 ±0.5 µm/m/°C

52 to 550 mm


Ultra-high accuracy stainless steel ring

REXA scale (scale page)

REXA30

Installed accuracy:

(≥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 to 417 mm

Optional Advanced Diagnostic Tool ADTa-100

Advanced Diagnostic Tool ADTa-100

RESOLUTE encoder readheads (marked with the ADT symbol) are compatible with the Advanced Diagnostic Tool ADTa-100 and ADT View software. They provide comprehensive real-time encoder data feedback to aid more challenging installations and diagnostics. The intuitive software interface can be used for:

  • Remote calibration
  • Signal optimisation over the entire axis length
  • Digital readout of encoder position (relative to the scale)
  • Exporting and saving data
  • Setting zero