Felipe M.
02288794d1
Replace the sharp-edged cylindrical recess with proper fillets at both joints: a concave wall-to-floor fillet that narrows the floor, and a rounded wall-to-front-face joint where the rim opens to recess_d + 2f. Adds the recess_fillet_r parameter (default 0.8 mm).
85 lines
3.3 KiB
OpenSCAD
85 lines
3.3 KiB
OpenSCAD
// Cutout geometry for accessories that mount to the IKEA Skadis pegboard
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// via the printable T-Clip system from
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// https://www.printables.com/model/256896-skadis-t-clip-system
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//
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// Provides:
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// skadis_t_clip_cutout(plate_thickness, slot_w, slot_h,
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// recess_d, recess_depth, recess_fillet_r)
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// Negative geometry for one mount: pill-shaped through-slot plus a
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// cylindrical recess on the front face whose two outer joints (the
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// rim where the front face meets the wall, and the inner edge where
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// the wall meets the recess floor) are filleted by recess_fillet_r.
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// Place at the desired (x, z) of the slot center and subtract from
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// the back plate.
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//
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// Coordinate system at the cutout's origin:
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// X = horizontal (slot's short axis)
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// Y = pegboard outward; back face at Y=0, front face at Y=plate_thickness
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// Z = vertical (slot's long axis)
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// Standard Skadis grid pitch (mm) — for callers that stack multiple mounts
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SKADIS_PITCH = 40;
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module skadis_t_clip_cutout(
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plate_thickness,
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slot_w = 5.0,
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slot_h = 15.0,
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recess_d = 22.2,
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recess_depth = 2.9,
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recess_fillet_r = 0.8
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) {
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// Pill-shaped through-slot: hull of two cylinders aligned with Y.
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slot_pad = 1;
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e = (slot_h - slot_w) / 2;
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hull()
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for (zc = [-e, e])
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translate([0, -slot_pad, zc])
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rotate([-90, 0, 0])
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cylinder(h = plate_thickness + 2 * slot_pad, d = slot_w);
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// Cylindrical recess of diameter recess_d with proper fillets at
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// both joints. The wall-to-floor joint (interior, concave from
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// inside the recess) tightens the floor by recess_fillet_r; the
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// wall-to-front-face joint (exterior, rounded plate corner) opens
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// the rim by recess_fillet_r so it joins the front face smoothly.
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recess_pad = 0.5;
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translate([0, plate_thickness - recess_depth, 0])
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rotate([-90, 0, 0])
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rotate_extrude($fn = 96)
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polygon(_skadis_recess_profile(
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r = recess_d / 2,
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depth = recess_depth,
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f = recess_fillet_r,
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pad = recess_pad));
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}
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// Radial-axial 2D profile of the filleted-recess negative. X is the
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// radial direction, Y is the axial direction (Y=0 at the recess floor,
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// Y=depth at the front face, with a pad above for clean Boolean cuts).
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//
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// Two proper fillets, each bulging toward the corner being rounded:
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// - bottom fillet: rounds the negative's convex floor-to-wall joint
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// (arc center at (r-f, f), inside the negative)
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// - top fillet: rounds the plate's convex wall-to-front-face joint
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// (arc center at (r+f, depth-f), inside the plate material)
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// The bottom narrows the floor by f; the top opens the rim wider by f.
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function _skadis_recess_profile(r, depth, f, pad, n_arc = 16) =
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let (
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bottom_arc = [
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for (i = [0 : n_arc])
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let (a = 270 + 90 * i / n_arc)
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[(r - f) + f * cos(a), f + f * sin(a)]
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],
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top_arc = [
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for (i = [0 : n_arc])
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let (a = 180 - 90 * i / n_arc)
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[(r + f) + f * cos(a), (depth - f) + f * sin(a)]
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]
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)
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concat(
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[[0, 0]],
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bottom_arc,
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top_arc,
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[[r + f, depth + pad]],
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[[0, depth + pad]]
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);
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