Add parametric OpenSCAD mount for UC-844 eye camera#36
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Pocket-frame with a tight registration zone plus a looser lead-in zone locates the 38x38mm PCB by its edges to fix the looseness of the old mount, with 4 corner heat-set-insert bosses/gussets to bolt the board down and a perforated floor for airflow (per 3d-files/NOTES.md). Reuses two properties measured directly from the old mount's real STEP file (3d-files/bottom mount/v1 various internal eye cams.step): the 60 degree camera tilt, and the glasses-attachment clip's snap-fit keyhole slot geometry (mouth/neck/pocket widths + bolt hole). Parameters are grouped by confidence (measured from STEP vs. from photos/ruler vs. designer defaults) so it's clear what to re-check before printing. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KF1U5JFzBcD4CbzqbnSUAs
Camera tilt was flipped so the pocket opening (where the PCB/lens faces) tilts back toward the spine and glasses clips - inward toward the eye - instead of outward away from the face. Frame is now a genuine open picture-frame (thin rim hugging the PCB edges, hollow in the middle) with a diagonal-braced pad at each corner carrying the mounting screw, instead of a solid slab. This makes the back-perforation workaround unnecessary since there's nothing solid left to perforate - airflow is inherent to the design now. Added an explicit connector tab so the spine still fuses solidly into the frame despite the hollow middle (verified via CGAL volume count on the exported STL). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KF1U5JFzBcD4CbzqbnSUAs
The old mount's camera bracket was tiny (~20x29.5x9mm, from its STEP file) next to this frame's 44x44mm footprint. Centering the PCB the same way in both, on an otherwise-identical flat/horizontal spine, pushes the new lens noticeably further from the clip attachment point than the old mount - which, given the tilt, means further up and away from the eye. This variant splits the spine into two segments with a bend (dip_angle) between them, so the frame-side segment angles downward before the frame attaches, compensating for that extra offset. Kept as a separate file from uc844_mount_v1.scad (flat spine) since there's no hard measurement yet for how much dip is actually needed - both are meant to be compared during test-fit. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KF1U5JFzBcD4CbzqbnSUAs
dip_angle and tilt_angle both rotate about the same axis, and the dip was applied with the same sign as the tilt, so it compounded the tilt instead of counteracting it - moving the lens further up/out rather than back down. Traced the actual centroid coordinates through both rotations to confirm: at dip_angle=25 the old (buggy) sign put the frame centroid at height 32.0 (higher than v1's 23.8); the fixed sign puts it at 11.7 (lower, as intended). Volume-check on the STL still confirms a single fused part after the fix. Also documented that the old mount's STEP file can't supply ground truth for how much dip is actually needed - its bracket solids turned out to be an unconnected comparison layout, not a modeled assembly - so a real ruler measurement off the physical old mount is the reliable way to calibrate this. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KF1U5JFzBcD4CbzqbnSUAs
The old camera's lens sits ~3/8in (9.5mm) above the clip. Solved for the dip_angle that puts this frame's PCB/lens centroid at the same height above the clip while holding tilt_angle fixed at 60 degrees (matching the old mount, per the user's requirement) - 29 degrees, up from the earlier placeholder guess of 25. Verified the centroid math directly (root-solved against the same transform chain used to catch the previous sign bug) and re-confirmed the part still fuses into one manifold solid after the change. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KF1U5JFzBcD4CbzqbnSUAs
A clearer board photo showed two nested corner-hole patterns, not one real + decoys as originally assumed from a blurrier shot. Measured both via circle detection (cross-checked against all 4 sides of each square): outer holes at 34.0mm pitch, inner at 28.0mm - matching the "compatible with 34x34, 28x28mm" note from the very first message. hole_pitch=34 already targeted the outer pattern correctly, so no functional change, but the confidence label and comments were wrong (claimed only 4 real holes existed) and are now corrected. Also tightened hole_dia to the measured 2.85mm (from a rough 3.0mm guess); purely informational, doesn't affect the geometry since the boss's own insert_hole_dia is sized independently. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KF1U5JFzBcD4CbzqbnSUAs
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Summary
3d-files/uc844_mount_v1.scad, a parametric OpenSCAD design for a new mount for the ArduCam UC-844 Rev.B (38x38mm PCB), replacing the old internal-eye-cam mount which was sized for a different camera.3d-files/NOTES.md.3d-files/bottom mount/v1 various internal eye cams.step): the 60° camera tilt angle, and the glasses-attachment clip's geometry — a snap-fit "keyhole" slot (not a screw-cinched clamp): the wire pops through a narrow pinch and is captured in a wider pocket, with a separate bolt hole that just attaches the clip to the spine.Test plan
xvfb-run -a openscad) from multiple angles to visually verify the pocket, corner bosses, perforation grille, and glasses clips.Simple: yes, one fused body) — printable as one part.hole_pitch,clip_spacing, tolerances, are flagged as low-confidence estimates that will likely need tuning after a first print).🤖 Generated with Claude Code
https://claude.ai/code/session_01KF1U5JFzBcD4CbzqbnSUAs
Generated by Claude Code