Description
The RCM475LY-13 is a high-accuracy, single-turn absolute optical rotary encoder designed for demanding motion control applications in semiconductor capital equipment, flat panel display (FPD) manufacturing, and precision automation. With a 25-bit resolution (33.554.432 positions per revolution), BiSS-C serial interface, and ultra-rigid mechanical design, this encoder delivers sub-arcsecond repeatability and minimal signal jitter—critical for wafer alignment, stage positioning, and robotic pick-and-place operations. The unit with serial number 1102016084 is a production-grade module built to operate reliably in ISO Class 5 cleanrooms, featuring low-outgassing materials, ESD-safe housing, and robust shaft coupling tolerance.
Application Scenarios
At a leading-edge advanced packaging facility in Korea, a flip-chip bonder experienced intermittent “placement offset” errors during high-throughput runs. Diagnostics revealed timing jitter from an aging incremental encoder causing phase lag in the servo loop. Engineers replaced it with a new RCM475LY-13 (S/N 1102016084), leveraging its absolute BiSS-C output to eliminate homing cycles and its 25-bit resolution to enable real-time error compensation. Post-installation, placement accuracy improved from ±1.8 µm to ±0.6 µm, and machine uptime increased by 15%. The encoder’s cleanroom-compliant construction also eliminated particulate concerns during chamber maintenance—validating its role as a performance and reliability multiplier.
