# PartContract for editable construction. Figure 3 controls all external dimensions. # Digital tolerances are comparison thresholds, not manufacturing tolerances. # Reference models are inspection-only. Required final outputs: one-solid KCL, STEP and STL. schema_version: 1 name: nist-amb2022-01-bridge-mesh intent: 'Reconstruct the NIST AMB2022-01 individual bridge artifact as editable, parameterized KCL from the attached NIST description excerpts and figures; Figure 3 is the dimensioned plan and elevation drawing and is authoritative for every external dimension. Frame: x along the 75 mm length with x = 0 at the pointed (45 degree tapered) end and x increasing toward the far end, y across the 5 mm width with y = 0 at one long side face, z vertical from the build plate (z = 0) upward. Model the tapered nose, the tall solid end block, the twelve legs with their 45 degree overhangs merging into the solid bridge, the eleven 1 mm wide top tabs on a 7 mm pitch, and the hollow leg L10 with its 0.5 mm outer walls, 1 mm base, four 4 mm tall internal thin walls parallel to x, and flat ceiling, exactly as documented. Where the sources do not fix a dimension (the single- and double-track thin-wall widths), record it as an open question and use a clearly labelled inferred value with a wide tolerance rather than approximating silently. One solid; export STEP and STL. Reference geometry supplied by NIST is for inspection only: the deliverable must be editable construction, never an import.' units: length: mm angle: deg material: null density_kg_m3: null process: Laser powder bed fusion (LPBF); nominal individual as-built geometry before EDM separation or tab skim cutting release_status: reconstruction frame: origin: Intersection of the tip plane x=0, the plane of the lower long side in Figure 3 plan y=0, and the build plate z=0. This datum intersection lies outside material. The physical nose tip is (0,2.5,0) at the base. This reproduces the supplied reference ingest min-datum frame. axes: x: Along the 75 mm length from the pointed nose toward the square far end; rightward in Figure 3 and in the recoating arrow direction. y: Across the 5 mm width from the lower long side in Figure 3 plan toward its upper long side; y=0 and y=5 are those side planes. z: Vertically upward from the build plate z=0; body top z=12 and tab tops z=12.5. datums: - name: A_buildPlate description: Common plane z=0 of the tall end-block foot and the twelve numbered leg feet; outward material normal -z. - name: B_longSide description: Plane y=0 containing the lower long side in Figure 3 plan, for x from the nose shoulder to the far end; outward normal -y. - name: C_tipPlane description: Plane x=0 through the pointed nose edge, perpendicular to the length. Intersect A, B and C to reproduce the coordinate origin. - name: D_farEnd description: Square far-end plane x=75, outward normal +x; L1 and the last top tab end here. envelope: min: - 0 - 0 - 0 max: - 75 - 5 - 12.5 tolerance: 0.1 parameters: - name: overallLength value: 75 unit: mm provenance: stated tolerance: 0.01 description: Tip-to-far-end distance; Figure 3 dimension 75 controls. source: 'sources/nist-amb2022-01-description.md §2.1.3: "75 mm long"; Figure 3 top dimension.' - name: overallWidth value: 5 unit: mm provenance: stated tolerance: 0.01 description: Distance from the lower long side in the plan to the upper long side. source: 'sources/nist-amb2022-01-description.md §2.1.3: "5 mm wide"; Figure 3 plan dimension 5.' - name: bodyHeight value: 12 unit: mm provenance: stated tolerance: 0.01 description: Build plate to main bridge top, excluding the raised tabs. Tabs translate with this top. source: 'sources/nist-amb2022-01-description.md §2.1.3: "12 mm tall"; §Process facts: tabs begin at 12 mm; Figure 3 elevation dimension 12.' edit_test: delta: 1 expect: volume_delta: 368.75 direction: increase tolerance_rel: 0.02 bbox_delta: - 0 - 0 - 1 - name: noseAngle value: 45 unit: deg provenance: stated tolerance: 0.1 description: Each nose flank makes 45 degrees with x in plan; the included tip angle is 90 degrees. source: 'sources/nist-amb2022-01-description.md §2.1.3: "45° taper"; Figure 3 left plan angle.' - name: noseLength value: 2.5 unit: mm provenance: derived tolerance: 0.1 description: Tip plane to full-width shoulder. Figure 3 explicitly labels this length 2.5. formula: overallWidth / (2 * tan(noseAngle)) - name: legCount value: 12 unit: '' provenance: stated tolerance: 0.01 description: Twelve numbered feet L1-L12, excluding the tall tapered end block. source: 'sources/nist-amb2022-01-description.md §1: "12 legs of varying size"; Figure 4 leg numbering.' - name: largeLegWidth value: 5 unit: mm provenance: measured tolerance: 0.1 description: x width of L1, L4, L7 and hollow L10. source: sources/nist-figure3-drawing.png elevation, far-right 5 callout; pixel columns 2766 to 2936, about 170 px. - name: mediumLegWidth value: 2.5 unit: mm provenance: measured tolerance: 0.1 description: x width of L3, L6, L9 and L12. source: sources/nist-figure3-drawing.png elevation, 2.5 callout; pixel columns 2528 to 2613, about 85 px. - name: smallLegWidth value: 0.5 unit: mm provenance: measured tolerance: 0.1 description: x width of L2, L5, L8 and L11; independent of the L10 outer-wall thickness. source: sources/nist-figure3-drawing.png elevation, 0.5 callout; pixel columns 2681 to 2698, about 17 px. - name: gapWidth value: 2 unit: mm provenance: measured tolerance: 0.1 description: x width of each of the twelve open-bottom gaps. source: sources/nist-figure3-drawing.png elevation, bottom 2 callout; pixel columns 2698 to 2766, about 68 px. - name: overhangAngle value: 45 unit: deg provenance: stated tolerance: 0.1 description: Roof of each open-bottom gap rises toward +x; angle measured from x in elevation. source: 'sources/nist-amb2022-01-description.md §2.1.3: "45° overhangs"; Figure 3 elevation angle.' - name: legMergeHeight value: 7 unit: mm provenance: stated tolerance: 0.01 description: z at the high end of the gap roofs, above which the bridge is continuous. source: 'sources/nist-amb2022-01-description.md §2.3: "height of 7 mm", where the gaps between legs merge.' - name: gapLowHeight value: 5 unit: mm provenance: derived tolerance: 0.1 description: z at the left/low end of every gap roof; corroborated by the Figure 3 right-hand 5 and 2 dimensions. formula: legMergeHeight - gapWidth * tan(overhangAngle) - name: legGroupCount value: 4 unit: '' provenance: derived tolerance: 0.01 description: Four triplets, each ordered medium, small, large when walking in +x. formula: legCount / 3 - name: legGroupPitch value: 14 unit: mm provenance: derived tolerance: 0.15 description: Triplet length including three gaps; corroborated by Figure 3 bottom 14 dimension, columns 2460 to 2936. formula: mediumLegWidth + smallLegWidth + largeLegWidth + 3 * gapWidth - name: endBlockLength value: 19 unit: mm provenance: derived tolerance: 0.15 description: End-block foot extends from x=0 to this position, before the first gap. Figure 3 columns 382 to 1030 corroborate about 19.03 mm. formula: overallLength - legGroupCount * legGroupPitch - name: tabCount value: 11 unit: '' provenance: stated tolerance: 0.01 description: Eleven full-width raised metrology ridges. source: 'sources/nist-amb2022-01-description.md §2.3: "11 tabs on top"; §3.4: "11 ridges"; counted in Figure 3.' - name: tabWidth value: 1 unit: mm provenance: measured tolerance: 0.1 description: x width of every top tab. source: sources/nist-figure3-drawing.png plan far-right 1 callout; columns 2901 to 2936, about 35 px. - name: tabPitch value: 7 unit: mm provenance: measured tolerance: 0.1 description: Pitch between corresponding edges of consecutive tabs. source: sources/nist-figure3-drawing.png plan far-right 7 callout; columns 2698 to 2936, about 238 px. - name: tabHeight value: 0.5 unit: mm provenance: measured tolerance: 0.1 description: Tab rise above bodyHeight; this makes the total height 12.5 mm. source: sources/nist-figure3-drawing.png elevation left 0.5 callout; tab crests near row 1069, main top near row 1085. edit_test: delta: 0.25 expect: volume_delta: 13.75 direction: increase tolerance_rel: 0.02 bbox_delta: - 0 - 0 - 0.25 - name: firstTabX value: 4 unit: mm provenance: derived tolerance: 0.15 description: Start of tab 1 counted from the nose. The final tab ends at overallLength. formula: overallLength - tabWidth - (tabCount - 1) * tabPitch - name: l10StartX value: 28 unit: mm provenance: derived tolerance: 0.15 description: Left boundary of hollow L10, the large foot of the first triplet after the end block. formula: endBlockLength + mediumLegWidth + smallLegWidth + 3 * gapWidth - name: l10OuterWallThickness value: 0.5 unit: mm provenance: stated tolerance: 0.1 description: Nominal thickness of all four L10 outer walls; source says approximately. Retain square external L10 footprint. source: 'sources/nist-amb2022-01-description.md §2.1.3: "outer walls ... approximately 0.5 mm thick".' - name: l10BaseThickness value: 1 unit: mm provenance: stated tolerance: 0.01 description: Solid base below every L10 pocket; cavity floors are at this z. source: 'sources/nist-amb2022-01-description.md §2.1.3: "solid base that is 1 mm thick"; Figure 3 1.0 callout.' - name: thinWallHeight value: 4 unit: mm provenance: stated tolerance: 0.01 description: Height of four internal walls and five adjacent void pockets, measured above the solid base. source: 'sources/nist-amb2022-01-description.md §2.1.3: "walls are built 4 mm high before a flat-bottomed ceiling"; Figure 3 4.0 callout.' - name: l10CavityLength value: 4 unit: mm provenance: derived tolerance: 0.2 description: Clear x length between L10 outer walls; matches the Figure 3 horizontal 4 callout. formula: largeLegWidth - 2 * l10OuterWallThickness - name: l10CavityWidth value: 4 unit: mm provenance: derived tolerance: 0.2 description: Clear y width before installing internal thin walls. formula: overallWidth - 2 * l10OuterWallThickness - name: l10CavityStartX value: 28.5 unit: mm provenance: derived tolerance: 0.15 description: Left end of all five void pockets and all four internal wall spans. formula: l10StartX + l10OuterWallThickness - name: l10CeilingZ value: 5 unit: mm provenance: derived tolerance: 0.02 description: Flat downward-facing cavity ceiling; material continues into the overhang and bridge above it. formula: l10BaseThickness + thinWallHeight - name: thinWallCount value: 4 unit: '' provenance: stated tolerance: 0.01 description: 'Four distinct physical walls: single, double, single, double in increasing y; two walls of each width.' source: 'sources/nist-amb2022-01-description.md §2.1.3: "four thin-wall structures", two single-track and two double-track; Figure 4 labels.' - name: singleTrackWidth value: 0.1 unit: mm provenance: inferred tolerance: 0.08 description: Provisional physical thickness of each single-track wall; not an as-built measurement. rationale: The supplied description gives only a laser spot diameter on the order of 0.1 mm. Use 0.10 mm as a necessary editable starting value, with a wide ±0.08 mm digital band. Neither laser spot size nor raster stroke thickness fixes the fused-wall width. The inspection mesh uses about 0.11 mm, which is corroboration of scale only. Open question OQ1 remains. edit_test: delta: 0.05 expect: volume_delta: 1.6 direction: increase tolerance_rel: 0.02 bbox_delta: - 0 - 0 - 0 - name: doubleTrackWidth value: 0.2 unit: mm provenance: inferred tolerance: 0.15 description: Provisional physical thickness of each double-track wall; independent of singleTrackWidth for editing. rationale: Use 0.20 mm as a necessary starting value, twice the nominal 0.10 mm spot scale, with a wide ±0.15 mm band. Track overlap and melt-pool width are unspecified, so this is not an enforced 2:1 relationship. The inspection mesh uses about 0.22 mm. Open question OQ1 remains. - name: wall1CenterY value: 1.25 unit: mm provenance: measured tolerance: 0.2 description: Center of internal wall 1 along y, measured from the lower long-side datum; single track. Graphical placement remains qualified by OQ2. source: 'sources/nist-figure4-legs-thinwalls.png 3900x1771 raster: single line centered at row 1357; y = overallWidth/2 + (1130.25 - row)/180.4, rounded to 0.05 mm; see brief §4.' - name: wall2CenterY value: 2 unit: mm provenance: measured tolerance: 0.2 description: Center of internal wall 2 along y, measured from the lower long-side datum; double track. Graphical placement remains qualified by OQ2. source: 'sources/nist-figure4-legs-thinwalls.png 3900x1771 raster: double lines centered at rows 1211 and 1232 (mean 1221.5); y = overallWidth/2 + (1130.25 - row)/180.4, rounded to 0.05 mm; see brief §4.' - name: wall3CenterY value: 2.85 unit: mm provenance: measured tolerance: 0.2 description: Center of internal wall 3 along y, measured from the lower long-side datum; single track. Graphical placement remains qualified by OQ2. source: 'sources/nist-figure4-legs-thinwalls.png 3900x1771 raster: single line centered at row 1068; y = overallWidth/2 + (1130.25 - row)/180.4, rounded to 0.05 mm; see brief §4.' - name: wall4CenterY value: 3.6 unit: mm provenance: measured tolerance: 0.2 description: Center of internal wall 4 along y, measured from the lower long-side datum; double track. Graphical placement remains qualified by OQ2. source: 'sources/nist-figure4-legs-thinwalls.png 3900x1771 raster: double lines centered at rows 922 and 944 (mean 933); y = overallWidth/2 + (1130.25 - row)/180.4, rounded to 0.05 mm; see brief §4.' features: - id: taperedNose kind: profile description: 'Full-height pentagonal nose in plan: tip (0,overallWidth/2), shoulders (noseLength,0) and (noseLength,overallWidth). Extrude to bodyHeight. The taper is in xy, with vertical flank faces.' parameters: - overallLength - overallWidth - bodyHeight - noseAngle - noseLength verify: - method: bbox - method: solid points: - - 0.5 - 2.5 - 6 - - 2 - 2.5 - 11 note: '' - method: void points: - - 1 - 0.5 - 6 - - 1 - 4.5 - 6 note: Points outside the two 45 degree plan flanks. - method: section section: solidBridge optional: false - id: tallSolidEndBlock kind: extrude description: The tapered end block has a continuous solid foot x=0..endBlockLength, followed by the first rising roof. It is additional to the twelve numbered legs. parameters: - overallWidth - bodyHeight - noseLength - endBlockLength verify: - method: solid points: - - 10 - 2.5 - 0.5 - - 10 - 2.5 - 11.5 - - 18.75 - 2.5 - 4.75 note: '' - method: face face: buildPlateEndBlock - method: section section: feetBelowCavity optional: false - id: twelveLegs kind: pattern description: Four triplets of medium, small, large feet in +x. L12 is closest to the tall end block and L1 is at x=70..75. Every foot spans y=0..overallWidth. Only L10 is hollow above its base. Exact intervals and the twelve gaps are tabulated in the brief. parameters: - legCount - legGroupCount - legGroupPitch - endBlockLength - mediumLegWidth - smallLegWidth - largeLegWidth - gapWidth - overallWidth - legMergeHeight verify: - method: count section: feetBelowCavity count: 13 note: 13 outer material loops = 12 numbered legs plus the end block. - method: solid points: - - 22.25 - 0.25 - 3 - - 25.75 - 0.25 - 3 - - 30.5 - 0.25 - 3 - - 36.25 - 0.25 - 3 - - 39.75 - 0.25 - 3 - - 44.5 - 0.25 - 3 - - 50.25 - 0.25 - 3 - - 53.75 - 0.25 - 3 - - 58.5 - 0.25 - 3 - - 64.25 - 0.25 - 3 - - 67.75 - 0.25 - 3 - - 72.5 - 0.25 - 3 note: One interior probe per numbered foot, including a side wall of hollow L10. - method: face face: buildPlateL1 - method: face face: buildPlateL2 - method: face face: buildPlateL3 - method: face face: buildPlateL4 - method: face face: buildPlateL5 - method: face face: buildPlateL6 - method: face face: buildPlateL7 - method: face face: buildPlateL8 - method: face face: buildPlateL9 - method: face face: buildPlateL10 - method: face face: buildPlateL11 - method: face face: buildPlateL12 optional: false count: 12 - id: risingOverhangs kind: cut description: Twelve gaps open through both long sides and the build plate. For gap left edge a, 0 < z < gapLowHeight + (x-a)*tan(overhangAngle), a < x < a+gapWidth, is void. Thus the roof rises from z=5 to z=7 toward +x; all gaps close at z=7. parameters: - gapWidth - gapLowHeight - legMergeHeight - overhangAngle - legCount - overallWidth - legGroupPitch verify: - method: section section: overhangs - method: void points: - - 20 - 2.5 - 0.5 - - 24.5 - 2.5 - 0.5 - - 27.0 - 2.5 - 0.5 - - 34.0 - 2.5 - 0.5 - - 38.5 - 2.5 - 0.5 - - 41.0 - 2.5 - 0.5 - - 48.0 - 2.5 - 0.5 - - 52.5 - 2.5 - 0.5 - - 55.0 - 2.5 - 0.5 - - 62.0 - 2.5 - 0.5 - - 66.5 - 2.5 - 0.5 - - 69.0 - 2.5 - 0.5 note: All twelve bottom gaps. - method: solid points: - - 19.5 - 2.5 - 5.75 - - 24.0 - 2.5 - 5.75 - - 26.5 - 2.5 - 5.75 - - 33.5 - 2.5 - 5.75 - - 38.0 - 2.5 - 5.75 - - 40.5 - 2.5 - 5.75 - - 47.5 - 2.5 - 5.75 - - 52.0 - 2.5 - 5.75 - - 54.5 - 2.5 - 5.75 - - 61.5 - 2.5 - 5.75 - - 66.0 - 2.5 - 5.75 - - 68.5 - 2.5 - 5.75 note: Above the low part of each slope. - method: void points: - - 20.5 - 2.5 - 6.25 - - 25.0 - 2.5 - 6.25 - - 27.5 - 2.5 - 6.25 - - 34.5 - 2.5 - 6.25 - - 39.0 - 2.5 - 6.25 - - 41.5 - 2.5 - 6.25 - - 48.5 - 2.5 - 6.25 - - 53.0 - 2.5 - 6.25 - - 55.5 - 2.5 - 6.25 - - 62.5 - 2.5 - 6.25 - - 67.0 - 2.5 - 6.25 - - 69.5 - 2.5 - 6.25 note: Below the high part of each slope; rejects the opposite slope direction. optional: false count: 12 - id: continuousUpperBridge kind: extrude description: Solid pentagonal-plan bridge from legMergeHeight to bodyHeight, continuously connected to all feet and the end block. parameters: - overallLength - overallWidth - noseLength - legMergeHeight - bodyHeight verify: - method: section section: solidBridge - method: solid points: - - 20 - 2.5 - 7.25 - - 24.5 - 2.5 - 7.25 - - 27.0 - 2.5 - 7.25 - - 34.0 - 2.5 - 7.25 - - 38.5 - 2.5 - 7.25 - - 41.0 - 2.5 - 7.25 - - 48.0 - 2.5 - 7.25 - - 52.5 - 2.5 - 7.25 - - 55.0 - 2.5 - 7.25 - - 62.0 - 2.5 - 7.25 - - 66.5 - 2.5 - 7.25 - - 69.0 - 2.5 - 7.25 note: '' - method: face face: sideDatumY0 - method: face face: oppositeSideY5 - method: face face: farEndX75 optional: false - id: elevenTopTabs kind: pattern description: Tabs occupy x=firstTabX+i*tabPitch through +tabWidth, y=0..overallWidth, and z=bodyHeight..bodyHeight+tabHeight for i=0..10. The final tab ends at x=75. parameters: - tabCount - tabWidth - tabPitch - tabHeight - firstTabX - overallWidth - bodyHeight verify: - method: count section: topTabs count: 11 - method: solid points: - - 4.5 - 2.5 - 12.25 - - 11.5 - 2.5 - 12.25 - - 18.5 - 2.5 - 12.25 - - 25.5 - 2.5 - 12.25 - - 32.5 - 2.5 - 12.25 - - 39.5 - 2.5 - 12.25 - - 46.5 - 2.5 - 12.25 - - 53.5 - 2.5 - 12.25 - - 60.5 - 2.5 - 12.25 - - 67.5 - 2.5 - 12.25 - - 74.5 - 2.5 - 12.25 note: '' - method: void points: - - 8 - 2.5 - 12.25 - - 43 - 2.5 - 12.25 note: Two valleys between tabs. - method: face face: tabTop01 - method: face face: tabTop02 - method: face face: tabTop03 - method: face face: tabTop04 - method: face face: tabTop05 - method: face face: tabTop06 - method: face face: tabTop07 - method: face face: tabTop08 - method: face face: tabTop09 - method: face face: tabTop10 - method: face face: tabTop11 optional: false count: 11 - id: l10OuterWalls kind: shell description: L10 outer footprint x=28..33, y=0..5. Its four 0.5 mm nominal side walls surround a clear 4 by 4 mm internal plan before the four thin walls are added. No exterior opening is permitted. parameters: - l10StartX - largeLegWidth - overallWidth - l10OuterWallThickness - l10CavityLength - l10CavityWidth - l10CavityStartX verify: - method: solid points: - - 28.25 - 2.5 - 3 - - 32.75 - 2.5 - 3 - - 30.5 - 0.25 - 3 - - 30.5 - 4.75 - 3 note: '' - method: section section: feetAndThinWalls - method: section section: l10Transverse optional: false - id: l10SolidBase kind: boss description: The L10 base is solid across its entire 5 by 5 mm footprint from z=0 to z=1; it supports both the outer and inner walls. parameters: - l10StartX - largeLegWidth - overallWidth - l10BaseThickness verify: - method: solid points: - - 30.5 - 0.85 - 0.5 - - 30.5 - 1.6 - 0.5 - - 30.5 - 2.45 - 0.5 - - 30.5 - 3.2 - 0.5 - - 30.5 - 4.1 - 0.5 note: '' - method: section section: feetBelowCavity - method: face face: buildPlateL10 - method: face face: l10Pocket1Floor - method: face face: l10Pocket2Floor - method: face face: l10Pocket3Floor - method: face face: l10Pocket4Floor - method: face face: l10Pocket5Floor optional: false - id: l10InternalThinWalls kind: wall description: Four planar internal walls parallel to x span x=28.5..32.5 and z=1..5, bonded to the x end walls, base and ceiling. In +y their centers are 1.25, 2.00, 2.85, 3.60 mm and widths are single, double, single, double. The double-track members are single physical walls, not two disconnected ribs. parameters: - thinWallCount - thinWallHeight - l10BaseThickness - l10CavityLength - l10CavityStartX - singleTrackWidth - doubleTrackWidth - wall1CenterY - wall2CenterY - wall3CenterY - wall4CenterY verify: - method: solid points: - - 30.5 - 1.25 - 3 - - 30.5 - 2 - 3 - - 30.5 - 2.85 - 3 - - 30.5 - 3.6 - 3 note: '' - method: section section: l10Transverse - method: section section: longitudinalSingleWall - method: section section: feetAndThinWalls optional: false count: 4 - id: l10FiveSealedPockets kind: cavity description: The four internal walls partition the cavity into five separate sealed rectangular voids. All pockets share x=28.5..32.5 and z=1..5; their nominal y intervals are [0.5,1.2], [1.3,1.9], [2.1,2.8], [2.9,3.5], [3.7,4.5]. Five inner section loops are required, inside one material body. parameters: - l10CavityLength - l10CavityWidth - l10CavityStartX - l10BaseThickness - l10CeilingZ - thinWallHeight - singleTrackWidth - doubleTrackWidth - wall1CenterY - wall2CenterY - wall3CenterY - wall4CenterY verify: - method: void points: - - 30.5 - 0.85 - 3 - - 30.5 - 1.6 - 3 - - 30.5 - 2.45 - 3 - - 30.5 - 3.2 - 3 - - 30.5 - 4.1 - 3 note: '' - method: section section: l10Transverse - method: section section: longitudinalPocket - method: section section: feetAndThinWalls optional: false count: 5 - id: l10FlatCeiling kind: extrude description: Five coplanar downward-facing pocket ceilings at z=5 seal the voids and bond to all four internal walls. Solid material continues above the ceiling; the ceiling is flat even though the adjacent external gap roof slopes. parameters: - l10CeilingZ - l10BaseThickness - thinWallHeight - l10CavityStartX - l10CavityLength - bodyHeight verify: - method: solid points: - - 30.5 - 0.85 - 5.25 - - 30.5 - 1.6 - 5.25 - - 30.5 - 2.45 - 5.25 - - 30.5 - 3.2 - 5.25 - - 30.5 - 4.1 - 5.25 note: '' - method: void points: - - 30.5 - 0.85 - 4.75 - - 30.5 - 1.6 - 4.75 - - 30.5 - 2.45 - 4.75 - - 30.5 - 3.2 - 4.75 - - 30.5 - 4.1 - 4.75 note: '' - method: section section: l10Transverse - method: face face: l10Pocket1Ceiling - method: face face: l10Pocket2Ceiling - method: face face: l10Pocket3Ceiling - method: face face: l10Pocket4Ceiling - method: face face: l10Pocket5Ceiling optional: false interfaces: - name: buildPlateContacts description: Coplanar z=0 attachment faces named buildPlateEndBlock and buildPlateL1 through buildPlateL12; no build-plate slab is included. must_not_change: true - name: sideAndEndDatums description: Named y=0, y=5 and x=75 external faces preserve the specified inspection frame. must_not_change: true - name: metrologyTabTops description: Eleven named planar ridge tops tabTop01 through tabTop11, counted from the pointed end. Baseline z=12.5; intentional bodyHeight/tabHeight edits move these surfaces. must_not_change: false - name: sealedL10Pockets description: Five individually sealed pockets with named floor and ceiling faces; no inlet, outlet, or powder-removal opening. must_not_change: true acceptance: bbox_tolerance: 0.1 volume: expected: 3678.1 tolerance_rel: 0.002 provenance: derived note: |- Derived analytic nominal construction, using the inferred widths and measured wall centers. Angles in tan() are degrees. Aplan = overallWidth*(overallLength - noseLength/2). Q = gapWidth*(gapLowHeight + legMergeHeight)/2 (one gap area in xz). T = 2*singleTrackWidth + 2*doubleTrackWidth. V = Aplan*bodyHeight + tabCount*tabWidth*overallWidth*tabHeight - legCount*overallWidth*Q - l10CavityLength*l10CavityWidth*thinWallHeight + l10CavityLength*thinWallHeight*T = 3678.10 mm3. Center-of-mass formula (PointQuantity has no note field): C = sum(v_i*c_i)/V, with signed volumes and centroids of the pentagonal prism, 11 tab prisms, 12 negative gap prisms, negative cavity box, and four positive wall prisms as detailed in brief §5. First moments [Mx,My,Mz] = [135794.55, 9195.73, 24543.675] mm4; C=[36.919754765,2.500130502,6.672922161] mm. Reference comparison only: reference/reference.json measurements.volume=3679.060003280461 mm3 (suggested ±1%); its 0.960003 mm3 excess is explained by reference nominal track widths about 0.11/0.22 mm versus inferred 0.10/0.20 mm. Do not silently replace the contract widths with mesh dimensions. surface_area: expected: 3384.458441227157 tolerance_rel: 0.002 provenance: derived note: |- Derived total material boundary area, including the five sealed pockets. Aplan and Q are defined in acceptance.volume.note. Pplan=2*(overallLength-noseLength)+overallWidth+2*sqrt(noseLength^2+(overallWidth/2)^2). Sext=2*Aplan+Pplan*bodyHeight+2*tabCount*tabHeight*(overallWidth+tabWidth)+legCount*(overallWidth*(gapLowHeight+legMergeHeight+sqrt(gapWidth^2+(legMergeHeight-gapLowHeight)^2)-gapWidth)-2*Q)=3170.058441227157 mm2. qSum=l10CavityWidth-2*singleTrackWidth-2*doubleTrackWidth=3.4 mm. Svoid=2*((l10CavityLength+thinWallHeight)*qSum+(thinWallCount+1)*l10CavityLength*thinWallHeight)=214.4 mm2. Stotal=Sext+Svoid=3384.458441227157 mm2. The supplied reference mesh measures 3383.498437946426 mm2; reference track widths reduce the internal area by about 0.96 mm2. center_of_mass: expected: - 36.919754765 - 2.500130502 - 6.672922161 tolerance: 0.25 provenance: derived solid_count: 1 sections: - id: feetBelowCavity plane: z at: 0.5 expect: area: 248.75 area_tolerance_rel: 0.01 loops: 13 holes: 0 description: 'Derived: Aplan - legCount*gapWidth*overallWidth = 248.75 mm2. The end block and twelve separate feet give 13 outer loops; L10 is solid below its 1 mm cavity floor.' - id: feetAndThinWalls plane: z at: 3 expect: area: 235.15 area_tolerance_rel: 0.01 loops: 13 holes: 5 description: 'Derived: 248.75 - l10CavityLength*(l10CavityWidth - 2*singleTrackWidth - 2*doubleTrackWidth). L10 is one ring-and-ribs region with five holes; total outer loops remain 13.' - id: overhangs plane: z at: 6 expect: area: 308.75 area_tolerance_rel: 0.01 loops: 13 holes: 0 description: 'Derived: Aplan - legCount*overallWidth*(gapWidth - (6-gapLowHeight)/tan(overhangAngle)). At z=6 each gap has narrowed from 2 mm to 1 mm toward its +x end.' - id: solidBridge plane: z at: 9 expect: area: 368.75 area_tolerance_rel: 0.01 loops: 1 holes: 0 description: 'Derived: Aplan = overallWidth*(overallLength - noseLength/2). The entire pentagonal plan is solid above the 7 mm gap closure.' - id: topTabs plane: z at: 12.25 expect: area: 55 area_tolerance_rel: 0.01 loops: 11 holes: 0 description: 'Derived: tabCount*tabWidth*overallWidth = 55 mm2. Eleven disconnected section islands, each 1 by 5 mm, connected to the same body below.' - id: l10Transverse plane: x at: 30.5 expect: area: 46.4 area_tolerance_rel: 0.01 loops: 1 holes: 5 description: 'Derived: overallWidth*bodyHeight - thinWallHeight*(l10CavityWidth - 2*singleTrackWidth - 2*doubleTrackWidth). This cut misses the top tabs and exposes the four walls, solid base, flat ceiling, and five sealed holes.' - id: longitudinalPocket plane: y at: 2.5 expect: area: 745.5 area_tolerance_rel: 0.01 loops: 1 holes: 1 description: 'Derived: overallLength*bodyHeight + tabCount*tabWidth*tabHeight - legCount*Q - l10CavityLength*thinWallHeight; Q=gapWidth*(gapLowHeight+legMergeHeight)/2. This center plane passes through pocket 3 and the nose tip.' - id: longitudinalSingleWall plane: y at: 1.25 expect: area: 746.5 area_tolerance_rel: 0.01 loops: 1 holes: 0 description: 'Derived: (overallLength - abs(1.25-overallWidth/2)/tan(noseAngle))*bodyHeight + tabCount*tabWidth*tabHeight - legCount*Q. This plane lies in wall 1, so the L10 cavity is bridged by solid material at z=1..5.' faces: - name: buildPlateEndBlock plane: z at: 0 normal: '-' area: 88.75 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 10.1103286385 - 2.5 - name: buildPlateL1 plane: z at: 0 normal: '-' area: 25.0 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 72.5 - 2.5 - name: buildPlateL2 plane: z at: 0 normal: '-' area: 2.5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 67.75 - 2.5 - name: buildPlateL3 plane: z at: 0 normal: '-' area: 12.5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 64.25 - 2.5 - name: buildPlateL4 plane: z at: 0 normal: '-' area: 25.0 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 58.5 - 2.5 - name: buildPlateL5 plane: z at: 0 normal: '-' area: 2.5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 53.75 - 2.5 - name: buildPlateL6 plane: z at: 0 normal: '-' area: 12.5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 50.25 - 2.5 - name: buildPlateL7 plane: z at: 0 normal: '-' area: 25.0 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 44.5 - 2.5 - name: buildPlateL8 plane: z at: 0 normal: '-' area: 2.5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 39.75 - 2.5 - name: buildPlateL9 plane: z at: 0 normal: '-' area: 12.5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 36.25 - 2.5 - name: buildPlateL10 plane: z at: 0 normal: '-' area: 25.0 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 30.5 - 2.5 - name: buildPlateL11 plane: z at: 0 normal: '-' area: 2.5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 25.75 - 2.5 - name: buildPlateL12 plane: z at: 0 normal: '-' area: 12.5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 22.25 - 2.5 - name: sideDatumY0 plane: y at: 0 normal: '-' area: 731.5 area_tolerance_rel: 0.01 tolerance: 0.1 - name: oppositeSideY5 plane: y at: 5 normal: + area: 731.5 area_tolerance_rel: 0.01 tolerance: 0.1 - name: farEndX75 plane: x at: 75 normal: + area: 62.5 area_tolerance_rel: 0.01 tolerance: 0.1 - name: tabTop01 plane: z at: 12.5 normal: + area: 5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 4.5 - 2.5 - name: tabTop02 plane: z at: 12.5 normal: + area: 5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 11.5 - 2.5 - name: tabTop03 plane: z at: 12.5 normal: + area: 5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 18.5 - 2.5 - name: tabTop04 plane: z at: 12.5 normal: + area: 5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 25.5 - 2.5 - name: tabTop05 plane: z at: 12.5 normal: + area: 5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 32.5 - 2.5 - name: tabTop06 plane: z at: 12.5 normal: + area: 5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 39.5 - 2.5 - name: tabTop07 plane: z at: 12.5 normal: + area: 5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 46.5 - 2.5 - name: tabTop08 plane: z at: 12.5 normal: + area: 5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 53.5 - 2.5 - name: tabTop09 plane: z at: 12.5 normal: + area: 5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 60.5 - 2.5 - name: tabTop10 plane: z at: 12.5 normal: + area: 5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 67.5 - 2.5 - name: tabTop11 plane: z at: 12.5 normal: + area: 5 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 74.5 - 2.5 - name: l10Pocket1Floor plane: z at: 1 normal: + area: 2.8 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 30.5 - 0.85 - name: l10Pocket1Ceiling plane: z at: 5 normal: '-' area: 2.8 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 30.5 - 0.85 - name: l10Pocket2Floor plane: z at: 1 normal: + area: 2.4 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 30.5 - 1.6 - name: l10Pocket2Ceiling plane: z at: 5 normal: '-' area: 2.4 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 30.5 - 1.6 - name: l10Pocket3Floor plane: z at: 1 normal: + area: 2.8 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 30.5 - 2.45 - name: l10Pocket3Ceiling plane: z at: 5 normal: '-' area: 2.8 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 30.5 - 2.45 - name: l10Pocket4Floor plane: z at: 1 normal: + area: 2.4 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 30.5 - 3.2 - name: l10Pocket4Ceiling plane: z at: 5 normal: '-' area: 2.4 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 30.5 - 3.2 - name: l10Pocket5Floor plane: z at: 1 normal: + area: 3.2 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 30.5 - 4.1 - name: l10Pocket5Ceiling plane: z at: 5 normal: '-' area: 3.2 area_tolerance_rel: 0.01 tolerance: 0.1 center: - 30.5 - 4.1 deviation: p95_max: 0.2 hausdorff_max: 0.5 silhouette_iou_min: 0.98 blockout: volume_min: 4600.15625 volume_max: 4618.59375 export_volume_tolerance_rel: 0.002 references: - path: sources/nist-amb2022-01-description.md kind: text role: authoritative sha256: ad20b8b64ceffc5122b055fd97c5e12b4b89b3cd2d52876ba74afb4d66cf2094 units: mm revision: NIST page inspected 2026-09-15; local geometry excerpts note: Geometry excerpts; §§1, 2.1.3, 2.3 and process facts. Geometry is nominal as built, before EDM and skim cutting. - path: sources/nist-figure3-drawing.png kind: drawing role: authoritative sha256: a2377f44a5d37ee5e2193817bc33f079d664fae8c9df7bd675480f9e97b37d49 units: mm revision: NIST Figure 3, updated 2023-09-20 note: External dimensions and their arrangement control. 3127x1821 pixels; original raster coordinates are recorded in §4. - path: sources/nist-figure4-legs-thinwalls.png kind: image role: authoritative sha256: a55dce91299778420a4970d51478be5856a89b291644459d93b7cb71524b7417 units: mm revision: NIST Figure 4, Layer 50; revision date unspecified; supplied 2026-09-15 note: Leg numbering, four-wall topology and scan-line arrangement. Physical track widths and exact scan-to-surface datum are qualified by OQ1/OQ2. 3900x1771 pixels. - path: sources/AMB2022-01-AMMT-PartCAD.STL kind: mesh role: illustrative sha256: d92f368a35952ff877624f3d15fb0e38c099e2528cfd96bf1d76a868a088e1f4 units: mm revision: NIST AMB2022-01 individual-part STL; revision unspecified; supplied 2026-09-15 note: Inspection-only NIST reference; all construction must be editable KCL. Explicit Figure 3 dimensions take precedence. Signed-shell inspection finds one outer shell and five inward pocket shells. - path: reference/reference.json kind: reference-model role: illustrative sha256: 04cecbfa70a33ff22219241703a4cad614239953b5adcc7932bfeab6f4f78dff units: mm revision: Ingest generated 2026-09-15T16:44:16Z note: Deterministic measurements with measured (reference model) provenance, identity axes, mm scale, min datum, and suggested fidelity bands. Sections use to_3d matrices; their local coordinates are not part coordinates. - path: reference/reference.ply kind: mesh role: illustrative sha256: 4ea678f069d6057ffc44cd324e975c35663bfd795184716f89d56ae305b00e94 units: mm revision: Ingest generated 2026-09-15T16:44:16Z note: Normalized inspection/fidelity mesh produced by the ingest; never import into the deliverable. - path: reference/reference-sections.png kind: image role: illustrative sha256: 5cf02a12910b23264f1895ea5263171d248f98e3443155f82e64c7cdc04f7c8b units: mm revision: Ingest generated 2026-09-15T16:44:16Z note: Section sheet with z=3,6,9,12.3 and x=30.5; visual aid to reference.json, not an independent dimensional source. - path: reference/silhouette-front.png kind: image role: illustrative sha256: f049d290879efb0e2e2b370c053c6179bd42888f833e87f7e6533dcb89cac90b units: mm revision: Ingest generated 2026-09-15T16:44:16Z note: Orthographic xz silhouette, 840x173 px, about 0.09375 mm per pixel with 20 px margins. - path: reference/silhouette-right.png kind: image role: illustrative sha256: ef9e98ec528b46c02923a529facad0ac26727041648bb1494bc8bdf5dee78ff5 units: mm revision: Ingest generated 2026-09-15T16:44:16Z note: Orthographic yz silhouette, 360x840 px, 0.015625 mm per pixel with 20 px margins. - path: reference/silhouette-top.png kind: image role: illustrative sha256: b4c6d94ec479f4b6e63a0b7c71ec5b98cb365cfa618ed09b15ea8dad086a0504 units: mm revision: Ingest generated 2026-09-15T16:44:16Z note: Orthographic xy silhouette, 840x93 px, about 0.09375 mm per pixel with 20 px margins. open_questions: - 'OQ1: What are the physical single-track and double-track wall widths? Pending a dimensional or melt-track source, use singleTrackWidth=0.10 ±0.08 mm and doubleTrackWidth=0.20 ±0.15 mm. The inspection mesh encodes about 0.11/0.22 mm, but does not establish as-built track widths.' - 'OQ2: What is the exact mapping from Figure 4 scan centerlines to the physical y-side datum? Use wall centers [1.25, 2.00, 2.85, 3.60] mm with ±0.20 mm image-measurement tolerance; the inspection mesh places them about 0.17 mm higher. The nominal mapping centers the shown hatch range within the 5 mm width.' - 'OQ3: Which alloy and density apply to this individual specimen? The supplied excerpts identify a metal-alloy LPBF bridge without selecting an alloy or density; both material and density remain unspecified.'