Renishaw Introduces Absolute Multi-DoF Encoder System

Semiconductor manufacturing, precision machining, photonics, and advanced automation systems increasingly require accurate multi-axis position feedback to maintain tight tolerances and high throughput. Addressing these requirements, Renishaw has introduced a true-absolute multi-degree-of-freedom (multi-DoF) optical encoder system, combining new scale technology with established absolute encoder readheads.

The system will be presented at Laser World of Photonics China 2026 (Shanghai, 18–20 March 2026, Stand E7.7201), targeting high-performance motion systems where accuracy, repeatability, and dynamic stability are critical.

New 1.5D scale enables direct multi-axis measurement
At the core of the system is the RXMA30 1.5D scale, designed to work alongside RESOLUTE absolute encoder readheads. The scale incorporates separate measurement tracks, allowing direct position feedback in both X and Y axes without relying on complex signal interpolation or computational reconstruction.

This approach simplifies system design while improving measurement reliability, particularly in applications where:

The use of absolute encoder technology eliminates the need for homing routines, which can be difficult or impractical in certain axes, especially where motion control is limited or constrained.

Measuring up to six degrees of freedom
The encoder system supports measurement across up to six degrees of freedom (6DoF), enabling detection of both linear and rotational deviations. This capability allows machine builders to monitor and compensate for common error sources, including:

By enabling in-process error compensation, the system contributes to improved process capability and higher yield in precision manufacturing environments.

Stability under thermal and dynamic conditions
The RXMA30 scale is engineered to maintain repeatable measurement performance under varying thermal and dynamic conditions. In high-speed or high-load motion systems, where temperature fluctuations and vibration can impact accuracy, stable metrology is essential for consistent output quality.

This makes the system suitable for applications such as:

Flexible integration into motion control architectures
The encoder solution is designed for compatibility with a wide range of serial interfaces and motion control platforms, allowing integration into existing machine architectures without extensive redesign.

Its modular configuration enables machine designers to combine multiple scales and readheads depending on system requirements, supporting both standardized designs and highly customized motion platforms.

Positioning within multi-axis encoder technologies
Multi-DoF encoder systems are increasingly used in applications where single-axis feedback is insufficient to achieve required tolerances. Compared to conventional linear encoders, multi-axis solutions reduce reliance on mechanical alignment and external calibration systems.

Renishaw’s approach focuses on combining absolute position measurement with multi-axis capability, reducing system complexity while enabling real-time compensation of mechanical errors—an approach aligned with trends in high-precision automation and smart manufacturing systems.

Edited by Industrial Journalist, Natania Lyngdoh — AI-Powered.

www.renishaw.com