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This was referenced Oct 7, 2026
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Adds a generic smooth belt idler contract with a through bore, axial clearance and flanges sized above the complete belt thickness.
Example:
beltidler_shape(smooth)_od20mm_bore5mm_beltw10mm_beltt2.2mm_clearance1mm_flangeh3mm_flanget1mm.The schema, strict parser, public exports and typed registration live in
src/models/beltidler/. Adding this family changes no shared registry, export list or generated source. Documentation covers dimensions, the placement datum, unit conversion and invalid or conflicting inputs.Schema, strict parser, public schema/type exports and typed registration remain in each
src/models/<name>/folder; generated discovery owns shared unions and barrels.belt idler
Paired renderer: tscircuit/jscad-electronics#430. Direct full-string fixture; verified browser preview.
The contact face occupies Z=0..12 mm by default, with flanges at -1..0 and 12..13 mm. The intended 10 mm belt sits at Z=1..11 mm; the flanges extend above its full thickness.
Contract tests, typecheck, formatting, build and diff checks passed locally. Source-group result: 83 pass / 0 fail / 2057 assertions.
Four-view snapshots (isometric, top, front and side):
Contract test workflow passed in CI at this exact head. Other passing checks: preview.
The combined contract union passed tests (105 tests, 0 failures, 2,994 assertions), typecheck, formatting and build.
Manual review only; auto-merge is not enabled. Geometry remains in the paired renderer PRs.