fix: sot343 symmetric about origin, matching KiCad SOT-343_SC-70-4 - #855
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fix: sot343 symmetric about origin, matching KiCad SOT-343_SC-70-4#855birdup000 wants to merge 1 commit into
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…scircuit#667) The left pad column sat at -p*1.92 while the right used +p only (missing the scale factor), so pads were lopsided (-1.056 vs +0.55) and the land pattern would not match a real SC-70-4. KiCad's SOT-343_SC-70-4 places pads at +/-0.825mm, so both columns now use p*1.5. The hardcoded courtyard is aligned to KiCad's exact outline (outer edge +/-1.45, arms +/-0.73) and keeps 100.00% courtyard IoU in the parity test. Fixes tscircuit#667
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Fixes #667
What
getCcwSot343Coordsscaled the left column byp*1.92but the right by barep, so pads sat at −1.056 / +0.55 (center −0.253, columns ~1.6mm apart) — a real SC-70-4's leads would miss half their pads. I fetched KiCad'sSOT-343_SC-70-4reference: pads are symmetric at ±0.825mm, so both columns now usep*1.5(0.55mm default pitch). The hardcoded courtyard is replaced with KiCad's exact outline (outer ±1.45, arms ±0.73).Verification
[−0.825, −0.825, +0.825, +0.825], centered on origin, column spacing 1.65mm = KiCad exactly