Measure a cylindrical part with a cutaway micrometer. Compare true reference size, thermal expansion, zero bias and rounded indication against a tolerance band and an explicit uncertainty interval.
• A 3D process cutaway of a micrometer measurement, thermal expansion, zero bias and tolerance decision, with labeled components you can select. • Controls: Part deviation from 20 mm (-0.12-0.12 mm), Part temperature (10-40 °C), Instrument zero bias (-0.02-0.02 mm), Indication resolution (0.001 mm / 0.01 mm), Expanded measurement uncertainty (0.005-0.03 mm). • Live readouts: Part size at current temperature; Indicated dimension; Reading minus uncertainty; Reading plus uncertainty; Decision: 1 accept / 0 review / −1 reject; Thermal size change. • Three guided experiments (Clearly within tolerance, Near upper limit, Out of tolerance), a built-in model verification check, a timestamped event log, a trial report and a short knowledge check.
L(T) = (20 + deviation)[1 + α(T−20)], α=11.5×10⁻⁶/K Reading = round[(L(T)+bias)/resolution] × resolution Acceptance: [reading−U,reading+U] wholly inside [19.950,20.050] Reject if disjoint; overlap without containment → review.
Static dimensional model with an illustrative steel expansion coefficient. The interval rule is explicitly chosen for teaching, not a universal inspection policy. No contact deformation, alignment error, temperature correction to the reported reading, uncertainty-budget estimation or calibration certificate. Dimensions, motion and process time are enlarged where stated for explanation. These are educational models, not machine programs or qualified production procedures.
No. Resolution is only one contributor to the measurement result.
No. Its uncertainty interval crosses the tolerance boundary.
Static dimensional model with an illustrative steel expansion coefficient. The interval rule is explicitly chosen for teaching, not a universal inspection policy. No contact deformation, alignment error, temperature correction to the reported reading, uncertainty-budget estimation or calibration certificate. These are educational models, not machine programs or qualified production procedures.