Optical encoder

  • 06-May-2009 05:01 EDT
RESOLUTE.jpg

Renishaw’s RESOLUTE optical encoder system achieves 27-bit resolution at 36,000 rpm. The system offers good dirt immunity while delivering resolution of 1 nm at up to 100 m/s, for both linear and angle encoding applications. Using a single-track optical scale, it acquires absolute position immediately upon switch-on, without battery backup, thus simplifying machine design by eliminating the need for reference runs. The device is suited for high-performance lathes as well as slower moving axes requiring high levels of precision and motion control integrity. It uses sophisticated optics to read a fine-pitch, 30-µm scale, resulting in low noise levels with jitter less than 10 nm rms for good positional stability. Enhanced detection technology provides a low subdivisional err­or of ±40 nm, resulting in better surface finish of machined parts from CNC machine tools, better scanning and velocity control, and solid servo stiffness on linear motors or rotary direct-drives when holding position.­
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