AnasSarkiz/magnetic-shutter-remote-r8

A USB‑C rechargeable battery-powered ESP32‑C3 wireless controller with Li‑ion charging, protected 3.3‑V buck‑boost regulation, thermal/safety monitoring, status LEDs, buttons, programming UART, crystal clock, and 2.4‑GHz antenna matching network.

Version
0.4.0-prototype
License
unset
Stars
0

evidence/R9-routing-2026-10-13/USB-SLOT-REVIEW.md

# USB shell-slot drawing and CAM correction — 2026-10-14

The first independent final CAM readback correctly rejected the supplier import's four plated slots. JLCPCB's published two-layer capability requires width >=0.5mm and total slot length >=2×width. The imported0.7999984mm-wide slots had total lengths1.1999976/1.499997mm and failed. Do not waive this manufacturing rule.

The retained exact HRO TYPE-C-31-M-12 drawing (`references/R9-routing/C165948.pdf`,2020-12-08,page1) specifies four0.60mm-wide plated slots,1.40mm long toward the connector mouth and1.70mm at the rear. Their center rows are4.18mm apart and center columns8.65mm apart. The supplied library's0.8×1.2/1.5 holes differ from this drawing; this is a supplier-library/drawing mismatch, not an established importer transformation bug.

`src/r9-usb-footprint.tsx` explicitly authors the drawing's0.6×1.4/1.7 holes. Original imports remain unchanged. Every electrical terminal label/center and SMT/body primitive is retained. Pin14 paste is recentered to the exact eight-vertex copper polygon:the supplier aperture was displaced0.0002032mm (0.2032µm), exceeding the retained0.0001mm attribution criterion. No checker tolerance is relaxed; other paste polygons are retained. The original1.2mm copper width is retained; the rear copper length grows2.0→2.1mm to preserve0.20mm nominal end annulus. Front1.8mm copper length remains. Slot ratios are2.333/2.833. No fitting hole is made smaller than the manufacturer's drawing. Current center errors remain below the drawing's±0.05mm layout tolerance.

The board and supplier contact-registration fixture remain distinct: assembly registration uses the unchanged independent supplier terminal centers and identifiers. This does not certify supplier hole dimensions. Actual native/copper/net/clearance/CAM checks must pass after the source change; no generated Circuit JSON or Gerber is edited.

Supplier filled/capped-via processing/cost and physical assembly qualification remain separate release gates. No supplier contact, order or upload was performed.