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OCuLink Riser for the Supermicro AIOM Slot
Public Unreviewedby John Lauer
Passive OCP NIC 3.0 SFF card that breaks a Supermicro AIOM slot's PCIe x16 into four OCuLink 4i ports (4 x4, Gen4): 6-layer, 85 ohm, length-matched, DRC-clean KiCad project with Gerbers, BOM and CPL.
main
John Lauer
The finished riser: KiCad project, Gerbers/BOM/CPL, design record, renders and analysis
09d929e
7d ago
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{
"plan": {
"schema": "adom/mark-plan@1",
"mpn": "TPS3808G33DBVTG4",
"step": "/home/adom/project/ocp-oculink-riser/kicad/3d/src/SOT-23-6.step",
"footprint": "/home/adom/project/ocp-oculink-riser/kicad/3d/src/SOT-23-6.kicad_mod",
"standUp": [],
"standUpSource": "as-is (Z up)",
"face": "top",
"pin1": {
"source": "footprint pad 1",
"xyMm": [
-1.1375,
0.95
],
"corner": "left/lower"
},
"existingMarks": [],
"vendorMarking": {
"present": false,
"glyphFaces": 0
},
"faceNormal": [
0,
0,
1
],
"longAxis": {
"axis": "y",
"vector": [
0.0,
1.0,
0.0
],
"why": "longest usable top dimension (2.17 mm vs 1.37 mm)",
"override": null
},
"readingDirection": {
"vector": [
-0.0,
-1.0,
0.0
],
"angleDeg": 270,
"textUp": [
1.0,
-0.0,
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": [
-0.6836,
-1.3336,
0.6836,
0.8386
],
"zMm": 1.55,
"lengthMm": 2.1722,
"heightMm": 1.3672,
"why": "highest flat face over the body centre",
"terminationsExcludedBy": null,
"trimmedEnds": [],
"keepouts": [
[
-0.4586,
0.8586,
-0.2086,
1.1086
]
],
"sideTurn": null,
"margins": {
"lengthEachSide": 0.12,
"heightEachSide": 0.15
}
},
"text": {
"lines": [
"TPS3808G",
"33DBVTG4"
],
"chars": 16,
"capHeightMm": 0.2588,
"smallestLineMm": 0.2588,
"heightPctOfBand": 43.5,
"why": "two lines: the smaller line (0.259 mm) beats one line (0.128 mm) by 2.03x",
"alternative": {
"lines": [
"TPS3808G33DBVTG4"
],
"capHeightMm": 0.1276,
"smallestLineMm": 0.1276
},
"font": "service-step2glb /laser-etch (single-stroke outline font)"
},
"etch": {
"poseQuarterTurnsZ": 1,
"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": 90,
"recipe": "adom-aiflow-etch outline <part.step> --footprint <part.kicad_mod> --mpn TPS3808G33DBVTG4 (stands the STEP up (as-is (Z up)), turns it 180 deg about Z and draws TPS3808G / 33DBVTG4 on the planned band, rot 90)",
"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": 78.33,
"capHeightPx": 16.6
},
"hints": [],
"warnings": [],
"summary": "Mark along the 2.17 mm axis (-Y), 0.26 mm text (2 lines), upright with pin 1 left lower, outline rot 90 after a 180 deg pose turn; ~17 px caps at 320 px"
},
"etch": {
"out": "/home/adom/project/ocp-oculink-riser/kicad/3d/etch/SOT-23-6_TPS3808G33DBVTG4.step",
"mpn": "TPS3808G33DBVTG4",
"lines": [
"TPS3808G",
"33DBVTG4"
],
"removedOldMarks": [],
"turns": [
{
"axis": "z",
"quarterTurns": 1
}
],
"serviceMarkTurnedQuarter": 0,
"line2Scaled": true,
"fit": {
"scale": 0.8435,
"capMm": 0.2524,
"markMm": [
1.6509,
0.5898
],
"bandMm": [
2.1722,
1.3672
],
"zMm": 1.555
}
}
}