Recommendations
- Substrate: glass encoder disc, with a hub of similar expansion coefficient or a uniform flexible adhesive layer.
- Signals: sine/cosine tracks for high interpolation — check DC offset, amplitude mismatch, phase and harmonics; see sin/cos signal quality.
- Eccentricity: specify pattern-to-bore concentricity and ask for a centering reference ring; consider two opposed readheads to cancel first-harmonic error.
- Inspection: agree acceptance criteria by zone in advance — see incoming inspection checklist.