RESOLUTE™ absolute encoder system with RELA30 linear scale

Features

Serial interfaces: BiSS® C, FANUC, Mitsubishi, Panasonic, Siemens DRIVE-CLiQ®, Yaskawa
Readhead size: 36 x 16.5 x 17.2 mm
Resolutions to 1 nm at 100 m/s
±1 µm accuracy at 20 °C
Scale coefficient of thermal expansion at 20 °C: 0.75 ±0.35 µm/m/°C
Vacuum compatible and side cable outlet versions available

Benefits

Very high accuracy combined with near zero thermal expansion
Excellent motion control performance
Exceptionally high dirt immunity
Wide set-up tolerances
Less than 10 nm RMS jitter for improved positional stability
±40 nm Sub-Divisional Error for smooth velocity control
Optional Advanced Diagnostic Tool

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What is RESOLUTE?

RESOLUTE is a true-absolute fine pitched optical encoder system that has excellent dirt immunity, and an impressive specification that breaks new ground in position feedback. It is the world's first absolute encoder capable of 1 nm resolution up to 100 m/s.

Ultra low Sub-Divisional Error (SDE) and jitter result in a linear encoder system that outperforms any other encoder in its class.

What is RELA30 scale?

RELA30 is a spar scale manufactured from ZeroMet, a low expansion nickel/iron alloy, featuring our 30 µm pitch absolute scale code.
It is comparable to fine pitch glass scales and offers a total accuracy (including slope and linearity) better than ±1 µm up to 1 m length. ZeroMet has a coefficient of thermal expansion of 0.75 ±0.35 µm/m/°C at 20 °C.
System designers can choose between specially formulated adhesive tape or mechanical clips to suit mounting requirements. Both mounting methods allow for independent thermal expansion to that of the substrate.

Why choose this encoder system?

Easy fault finding and servicing

The Advanced Diagnostic Tool ADTa‑100 acquires comprehensive real-time data from RESOLUTE™ encoder readheads (marked with the ADT symbol). The information is displayed via the user-friendly ADT View software interface. Whilst in most cases the integral set-up LED on the encoder is sufficient for setting up the system, the ADT can be used to aid more challenging installations. The ADT can also report on encoder performance and assist system fault finding to avoid lengthy machine downtime.

Excellent motion control performance

RESOLUTE's industry-leading performance is the result of a sophisticated, reliable and innovative method of operation. Crucially, the system uses a single track non-repeating “bar code” scale format with a nominal pitch of 30 µm. With its sophisticated optical design the RESOLUTE readhead captures a near-instantaneous image of this scale which, when analysed, allows a unique position to be identified at speeds of up to 100 m/s. The system allows position to be determined with resolution as small as 1 nanometre (1 billionth of a metre) and with low noise (jitter below 10 nm RMS) and SDE (Sub-Divisional Error, the error within a scale period) of just ±40 nm. This provides encoder feedback of superior fidelity, to ensure smoother velocity control and rock-solid positional stability.

Wide set-up tolerances

RESOLUTE does not follow the conventional technique of using dual tracks side-by-side (one incremental, one absolute) which inherently suffers de-phasing problems when small amounts of angular misalignment are introduced. Instead, this absolute encoder features a single track, optical absolute scale, combining both the absolute position and embedded phase information into one single code. This technology provides RESOLUTE with far wider set-up tolerances (yaw tolerance ±0.5°) for quick and easy installation and superior long-term reliability, even if the motion axes settle or move over time. To further aid installation and diagnostics, there is an integral set-up LED on the readhead.

External interface option

Siemens DRIVE-CLiQ external interface

Required for Siemens DRIVE-CLiQ serial interface
Also available in dual head input for high accuracy rotary systems
Displays communication alarms
Duplicates readhead LED

No external interface is required for the other available serial interfaces.

Optional 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

Serial interfaces

Serial interfaces	Description	Compatible products
BiSS C	Renishaw supports BiSS C (unidirectional) open protocol for absolute encoders. BiSS C is a high-speed serial interface, perfect for dynamic axes that require high acceleration, silky-smooth velocity control, excellent repeatability and rock-solid positional stability. RESOLUTE with BiSS C is available in both linear and rotary (angle) encoder versions, compatible with a wide range of industry-standard controllers, drives, DROs and PC counter cards.	BiSS C compatible product page
FANUC	RESOLUTE with FANUC (α and αi) serial interface is available for rotary and linear applications. RESOLUTE brings many advantages to high-performance machine tools that use FANUC controllers. Higher speed, rugged and reliable pure serial communications, superior contouring performance and greater servo stiffness. Furthermore, the non-contact format eliminates backlash, shaft wind-up (torsion) and other hysteresis errors that plague traditional enclosed encoders.	N/A
Mitsubishi	RESOLUTE with Mitsubishi serial interface is available in rotary and linear forms. RESOLUTE is compatible with the J4 and J5 series of servo drives, and the MDS-D2/DH2/DM2/DJ drives for machine tool applications.	N/A
Panasonic	RESOLUTE with Panasonic serial interface is available in linear and rotary forms. Compatible with the A5 and A6 series of drivers, it provides high resolution repeatable feedback for better servo and speed control.	N/A
Siemens DRIVE-CLiQ	RESOLUTE with Siemens DRIVE-CLiQ serial interface is available (using external interface) for linear and rotary applications. Siemens DRIVE-CLiQ is the innovative, powerful communications interface to connect encoder and direct measurement systems with SINUMERIK and SINAMICS drive components.	N/A
Yaskawa	RESOLUTE with Yaskawa serial interface is available in rotary and linear forms, and is compatible with Sigma-5 and Sigma-7 SERVOPACKs.	N/A

Refer to data sheet for full details.

Technical specifications

Measuring standard	Absolute coded high accuracy ZeroMet spar scale
Readhead size (LxWxH)	36 mm x 16.5 mm x 17.2 mm
Scale pitch	Nominal 30 μm
Coefficient of thermal expansion at 20 °C	0.75 ±0.35 μm/m/°C
Accuracy grade at 20 °C	Certified to ±1 μm, calibrated traceable to International Standards
Scale length	Some BiSS C protocol variants have limited maximum length (See data sheet for details) 80 mm to 1.5 m
Maximum speed	(See data sheet for details) Up to 100 m/s
Serial interfaces*	BiSS C, FANUC, Mitsubishi, Panasonic, Siemens DRIVE-CLiQ, Yaskawa
Resolutions	BiSS C: 50 nm, 5 nm and 1 nm resolutions FANUC, Mitsubishi and Siemens DRIVE-CLiQ,: 50 nm and 1 nm resolutions Panasonic: 100 nm, 50 nm and 1 nm resolutions Yaskawa: 50 nm and 1 nm resolutions
Sub-Divisional Error (SDE)	±40 nm
Electrical connection	Up to 10 m cable lengths with D-type connectors (9 pin or 15 pin), flying lead, FANUC compatible connector, LEMO, and M12
Power supply	5 V ±10%, max 250 mA @ 5 V (terminated)
Vibration (operating)	300 m/s²max @ 55 Hz to 2 000 Hz
Shock (non-operating)	1 000 m/s², 6 ms, ½ sine
Operating temperature	0 °C to +80 °C
Sealing	IP64