Encoders

Encoder Interpolation: From Sinusoidal Output to Position Counts

Interpolation is the mathematical process that subdivides the grating period of an optical or capacitive encoder into position counts finer than the physical line pitch. Understanding interpolation electronics — including the arctangent algorithm, signal conditioning requirements, and error sources — enables accurate specification of achievable resolution at a given signal quality.

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Encoder Technology for Surgical Robotics: Accuracy, Safety, and Sterilization Constraints

Surgical robotic systems impose the tightest combination of encoder requirements: absolute position without homing, high accuracy in a compact hollow-shaft form factor, functional safety certification, and compatibility with sterilization processes. Optical and capacitive sensing technologies dominate this application class for clearly defined engineering reasons.

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