Magnescale RU77 Absolute Rotary Encoder

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Compact High‑Accuracy Absolute Rotary Encoder for Industrial Motion Systems

The RU77 is a compact, enclosed absolute rotary encoder designed for high‑accuracy angular position feedback in machine tools and industrial automation systems. Supports FANUC, Mitsubishi and Yaskawa protocols without requiring an external amplifier

With a magnetic sensing system and robust enclosed design, the RU77 provides reliable performance in harsh environments while maintaining precise and stable measurement.

Key features

High‑accuracy angular measurement – Delivers accuracy of ±2.5 arcseconds for precision positioning
Ultra‑high resolution output – Up to 25‑bit resolution (33,554,432 pulses per revolution)
Compact, space‑saving design – Slim enclosed structure (approx. 42 mm thick) allows installation in limited spaces
Reliable in harsh environments – Magnetic detection operates reliably in oil, condensation and contamination
Flexible mounting configuration – Internal coupling enables adaptable installation and alignment
Direct CNC system integration – Supports FANUC, Mitsubishi and Yaskawa protocols without requiring an external amplifier

RU77 Rotary Encoder Magnescale configuration

How it works

The RU77 uses a magnetic, non‑contact absolute measurement principle within an enclosed housing:

Magnetic sensing ensures stable performance in industrial environments
Internal coupling accommodates mechanical tolerances and simplifies installation
Absolute signal output provides immediate position data without homing

This enables: