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John Lauer The finished riser: KiCad project, Gerbers/BOM/CPL, design record, renders and analysis 09d929e 7d ago
{
 "plan": {
  "schema": "adom/mark-plan@1",
  "mpn": "SN74LVC125APWR",
  "step": "/home/adom/project/ocp-oculink-riser/kicad/3d/src/TSSOP-14_4.4x5mm_P0.65mm.step",
  "footprint": "/home/adom/project/ocp-oculink-riser/kicad/3d/src/TSSOP-14_4.4x5mm_P0.65mm.kicad_mod",
  "standUp": [],
  "standUpSource": "as-is (Z up)",
  "face": "top",
  "pin1": {
   "source": "footprint pad 1",
   "xyMm": [
    -2.8625,
    1.95
   ],
   "corner": "left/upper"
  },
  "existingMarks": [],
  "vendorMarking": {
   "present": false,
   "glyphFaces": 4
  },
  "faceNormal": [
   0,
   0,
   1
  ],
  "longAxis": {
   "axis": "x",
   "vector": [
    1.0,
    0.0,
    0.0
   ],
   "why": "longest usable top dimension (4.14 mm vs 3.77 mm)",
   "override": null
  },
  "readingDirection": {
   "vector": [
    1.0,
    0.0,
    0.0
   ],
   "angleDeg": 0,
   "textUp": [
    -0.0,
    1.0,
    0.0
   ],
   "rule": "pin 1 / pad 1 at the start (left) of the text, and below it when it sits on a side"
  },
  "band": {
   "regionMm": [
    -2.0703,
    -2.3703,
    2.0703,
    1.4003
   ],
   "zMm": 1.0,
   "lengthMm": 4.1406,
   "heightMm": 3.7706,
   "why": "highest flat face over the body centre",
   "terminationsExcludedBy": null,
   "trimmedEnds": [],
   "keepouts": [
    [
     -1.6203,
     1.4203,
     -1.1203,
     1.9203
    ]
   ],
   "sideTurn": null,
   "margins": {
    "lengthEachSide": 0.12,
    "heightEachSide": 0.15
   }
  },
  "text": {
   "lines": [
    "SN74LVC",
    "125APWR"
   ],
   "chars": 14,
   "capHeightMm": 0.566,
   "smallestLineMm": 0.566,
   "heightPctOfBand": 34.5,
   "why": "two lines: the smaller line (0.566 mm) beats one line (0.278 mm) by 2.03x",
   "alternative": {
    "lines": [
     "SN74LVC125APWR"
    ],
    "capHeightMm": 0.2785,
    "smallestLineMm": 0.2785
   },
   "font": "service-step2glb /laser-etch (single-stroke outline font)"
  },
  "etch": {
   "poseQuarterTurnsZ": 0,
   "service": "/laser-etch?mode=flat",
   "note": "turn so the reading direction is +X, etch, fit the mark into the band, turn back"
  },
  "outline": {
   "upAxis": "z",
   "poseRotZDeg": 180,
   "rot": 180,
   "recipe": "adom-aiflow-etch outline <part.step> --footprint <part.kicad_mod> --mpn SN74LVC125APWR (stands the STEP up (as-is (Z up)), turns it 180 deg about Z and draws SN74LVC / 125APWR on the planned band, rot 180)",
   "why": "iso camera looks from +X+Y+Z: text along +Y (rot 90) or -X (rot 180) reads left to right with pin 1 toward the viewer"
  },
  "widget": {
   "px": 320,
   "pxPerMm": 38.57,
   "capHeightPx": 17.8
  },
  "hints": [],
  "warnings": [
   "pin 1 lands UPPER-left in the standard pose (left/upper): the pads are numbered clockwise; check the footprint is not mirrored and the model matches it"
  ],
  "summary": "Mark along the 4.14 mm axis (+X), 0.57 mm text (2 lines), upright with pin 1 left upper, outline rot 180 after a 180 deg pose turn; ~18 px caps at 320 px"
 },
 "etch": {
  "out": "/home/adom/project/ocp-oculink-riser/kicad/3d/etch/TSSOP-14_4.4x5mm_P0.65mm_SN74LVC125APWR.step",
  "mpn": "SN74LVC125APWR",
  "lines": [
   "SN74LVC",
   "125APWR"
  ],
  "removedOldMarks": [],
  "turns": [],
  "serviceMarkTurnedQuarter": 0,
  "line2Scaled": true,
  "fit": {
   "scale": 0.8549,
   "capMm": 0.5443,
   "markMm": [
    3.1469,
    1.2928
   ],
   "bandMm": [
    4.1406,
    3.7706
   ],
   "zMm": 1.005
  }
 }
}