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Contradictions, resolved against the design files: - GitHub repo description corrected to KiCad 10 and 6S (schematic/PCB carry generator_version 10.0; DOC_INPUT is "+BATT 6S", no 3S floor is documented). - DOC_NAME text variable now "OpenESC-20x20", matching the repo rename, so the old slug stops leaking into title blocks and fabrication exports. - 20x20-ESC-QC/README.md no longer claims project-local libraries only: 44 of the 45 fixture footprints come from KiCad's stock TestPoint library. Also records that the fixture schematic is a stub, so the one ESC-QC symbol is unused. - esc_thermal.py header and 20x20 profile name state that SP40N03GNJ is a superseded power stage and its numbers do not describe the shipping board (24x DOY180N03T). Parameters left untouched, re-parameterization needs the DOY180N03T datasheet. - *.kicad_dru removed from .gitignore: hardware/4in1-mini.kicad_dru is a hand-authored DRC rule, a design input, not generated output. - The "3D exports" ignore rule was malformed (**/.step matched nothing). Now hardware/*.step and 20x20-ESC-QC/*.step, which leaves the *.3dshapes/ library assets tracked. Duplication, each fact kept in one place: - README specification table dropped, the full table lives in DESIGN.md. - Production-export and flash-script statements kept in README Manufacturing; the layout rows and DESIGN.md now link there. - licensing/README.md removed, its one unique sentence moved into the README license section. THIRD_PARTY.md and TRADEMARKS.md keep the real content. Removed: - hardware/datasheets/COMPONENT_REVIEW.md, a v0.3 audit describing a power stage, current sense and regulator that are not in the design files. - hardware/scripts/v_beta_hygiene_fix.py, an applied migration whose target file and all three source strings no longer exist, and which byte-edits .kicad_sch against CONTRIBUTING. - hardware/4in1-mini.step (18.3 MB) and 20x20-ESC-QC/QC-20x20-PCB.step, regenerable board exports now correctly gitignored. - 20x20-ESC-QC/ESC-QC.pretty/.gitkeep, the directory holds a real footprint. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
20x20-ESC-QC: press-contact QC fixture
Bench test/QC jig for the OpenESC-20x20 (../hardware/4in1-mini). The
assembled ESC is pressed face-down onto this board so spring/pogo contacts land
on the ESC's exposed pads (power in, three phases per channel, signal lines) to
run functional and current-transfer tests without soldering leads.
Concept: this board is a negative of the ESC contact face. The ESC nests into a milled/offset pocket for alignment, and contact features sit under each of its exposed pads.
Layout / conventions (mirrors the parent repo)
- KiCad 10 project:
20x20-ESC-QC.kicad_{pro,sch,pcb}. The schematic is an empty stub: the fixture is laid out directly on the board, with no netlist. - Project-local libraries, declared in
sym-lib-tableandfp-lib-table:- Symbols:
ESC-QC.kicad_sym(one symbol,4in1ESC-negative, currently unused because the schematic is a stub) - Footprints:
ESC-QC.pretty/(one footprint,4in1ESC-negative: 34 pads plus the Edge.Cuts geometry of the ESC contact face) - 3D models:
ESC-QC.3dshapes/(empty)
- Symbols:
- The 44 contact pads come from KiCad's stock global
TestPointlibrary (TestPoint_Pad_2.0x2.0mm,3.0x3.0mm,4.0x4.0mm), not from a project-local library. Nothing else resolves globally. - License: hardware CERN-OHL-S-2.0 (same as parent).
Reference geometry
The contact locations must match the ESC's exposed pads exactly. Pad
coordinates and nets are extracted read-only from the source board,
../hardware/4in1-mini.kicad_pcb (kicad-cli or the pcbnew API); nothing in the
ESC design is modified.
Contacts to hit (from the ESC design)
- +BATT / GND: high-current, the press-contact points that matter most.
- Motor phases: 3 per channel x 4 channels (A/B/C) motor output pads.
- Signal: 4 DShot lines (/M1-/M4) plus +BATT, GND, and /CURR on J1 (SM08B-SRSS-TB), or its pad footprint if contacting the pads directly.
- Optional: SWD/boot test pads for the AT32F421 per channel.