Measurement Criterion

I measured overall length (L), breadth (B), and pore size (P).

  • L & B: two caliper readings from opposite sides (L1/L2, B1/B2), averaged.

  • P: five readings at the four corners + center, averaged.
    Nominals were L = 50.0 mm, B = 50.0 mm, P = 4.4 mm. I used a digital caliper (resolution 0.01 mm, taken as instrument uncertainty). To reflect process contraction, I included a 1.5% shrinkage allowance (updatable after calibration). Measurements were taken at room temperature with parts conditioned to ambient; I kept the caliper square and avoided compressing the lattice. Each sample had an ID; I logged L1, L2, B1, B2, P1–P5 and brief notes (e.g., sag/burrs). Units in mm, displayed to 2 decimals

Dimensional Accuracy Calculation

Code für systematische Fehleranalyse und Genauigkeitsberechnung in Prozent, inklusive Standardabweichungen und Rändern.

  • Deviation:

    • L/B: absolute differences from nominal for each reading, then averaged.

    • P: absolute difference between nominal and the five-point mean.

  • Random error: combine deviation with 0.01 mm instrument uncertainty using a root-sum-square approach.

  • Systematic term: add 1.5% of the measured value to get the total error (mm) for L, B, P.

  • Percent errors: convert each total error to a percentage of its nominal.

  • Overall figure: average the three percent errors (L, B, P); report Dimensional Accuracy (%) = 100 − overall percent error.