From 929c9ecd74628aa8cc7167b9b005212be8988801 Mon Sep 17 00:00:00 2001 From: sl-mechanical Date: Sat, 14 Mar 2026 11:51:40 -0400 Subject: [PATCH] feat: UWB anchor mount bracket (Issue #564) --- chassis/uwb_anchor_mount.scad | 464 +++++++++++++--------------------- 1 file changed, 171 insertions(+), 293 deletions(-) diff --git a/chassis/uwb_anchor_mount.scad b/chassis/uwb_anchor_mount.scad index 8213f04..6db7ed5 100644 --- a/chassis/uwb_anchor_mount.scad +++ b/chassis/uwb_anchor_mount.scad @@ -11,38 +11,38 @@ // coverage zone. // // Architecture: -// Wall base → flat backplate with 2× screw holes (wall or ceiling) -// Tilt knuckle → single-axis articulating joint; 15° detent steps -// locked with M3 nyloc bolt; range 0–90° -// Anchor cradle→ U-cradle holding ESP32 UWB Pro PCB on M2.5 standoffs -// USB-C channel→ routed groove on tilt arm + exit slot in cradle back wall -// Label slot → rear window slot for printed anchor-ID card strip +// Wall base -> flat backplate with 2x screw holes (wall or ceiling) +// Tilt knuckle -> single-axis articulating joint; 15deg detent steps +// locked with M3 nyloc bolt; range 0-90deg +// Anchor cradle-> U-cradle holding ESP32 UWB Pro PCB on M2.5 standoffs +// USB-C channel-> routed groove on tilt arm + exit slot in cradle back wall +// Label slot -> rear window slot for printed anchor-ID card strip // // Part catalogue: -// Part 1 — wall_base() Backplate + 2-ear pivot block + detent arc -// Part 2 — tilt_arm() Pivoting arm with knuckle + cradle stub -// Part 3 — anchor_cradle() PCB cradle, standoffs, USB-C slot, label window -// Part 4 — cable_clip() Snap-on USB-C cable guide for tilt arm -// Part 5 — assembly_preview() +// Part 1 -- wall_base() Backplate + 2-ear pivot block + detent arc +// Part 2 -- tilt_arm() Pivoting arm with knuckle + cradle stub +// Part 3 -- anchor_cradle() PCB cradle, standoffs, USB-C slot, label window +// Part 4 -- cable_clip() Snap-on USB-C cable guide for tilt arm +// Part 5 -- assembly_preview() // // Hardware BOM: -// 2× M4 × 30 mm wood screws (or #6 drywall screws) wall fasteners -// 1× M3 × 20 mm SHCS + M3 nyloc nut tilt pivot bolt -// 4× M2.5 × 8 mm SHCS PCB-to-cradle -// 4× M2.5 hex nuts captured in standoffs -// 1× USB-C cable anchor power +// 2x M4 x 30mm wood screws (or #6 drywall screws) wall fasteners +// 1x M3 x 20mm SHCS + M3 nyloc nut tilt pivot bolt +// 4x M2.5 x 8mm SHCS PCB-to-cradle +// 4x M2.5 hex nuts captured in standoffs +// 1x USB-C cable anchor power // // ESP32 UWB Pro interface (verify with calipers): -// PCB size : UWB_L × UWB_W × UWB_H (55 × 28 × 10 mm default) -// Mounting holes : M2.5, 4× corners on UWB_HOLE_X × UWB_HOLE_Y pattern -// USB-C port : centred on short edge, UWB_USBC_W × UWB_USBC_H -// Antenna area : top face rear half — 10 mm keep-out of bracket material +// PCB size : UWB_L x UWB_W x UWB_H (55 x 28 x 10 mm default) +// Mounting holes : M2.5, 4x corners on UWB_HOLE_X x UWB_HOLE_Y pattern +// USB-C port : centred on short edge, UWB_USBC_W x UWB_USBC_H +// Antenna area : top face rear half -- 10mm keep-out of bracket material // -// Tilt angles (15° detent steps, set TILT_DEG before export): -// 0° → horizontal face-up (ceiling, antenna faces down) -// 30° → 30° downward (wall near ceiling) [default] -// 45° → diagonal (wall mid-height) -// 90° → vertical face-out (wall, antenna faces forward) +// Tilt angles (15deg detent steps, set TILT_DEG before export): +// 0deg -> horizontal face-up (ceiling, antenna faces down) +// 30deg -> 30deg downward tilt (wall near ceiling) [default] +// 45deg -> diagonal (wall mid-height) +// 90deg -> vertical face-out (wall, antenna faces forward) // // RENDER options: // "assembly" full assembly at TILT_DEG (default) @@ -61,40 +61,40 @@ $fn = 64; e = 0.01; -// ── Tilt angle (override per anchor, 0–90°, 15° steps) ─────────────────────── +// -- Tilt angle (override per anchor, 0-90deg, 15deg steps) ------------------ TILT_DEG = 30; -// ── ESP32 UWB Pro PCB dimensions (verify with calipers) ────────────────────── -UWB_L = 55.0; // PCB length -UWB_W = 28.0; // PCB width -UWB_H = 10.0; // PCB + components height -UWB_HOLE_X = 47.5; // M2.5 hole X span -UWB_HOLE_Y = 21.0; // M2.5 hole Y span -UWB_USBC_W = 9.5; // USB-C receptacle width -UWB_USBC_H = 4.0; // USB-C receptacle height -UWB_ANTENNA_L = 20.0; // antenna area at PCB rear (keep-out) +// -- ESP32 UWB Pro PCB dimensions (verify with calipers) --------------------- +UWB_L = 55.0; +UWB_W = 28.0; +UWB_H = 10.0; +UWB_HOLE_X = 47.5; +UWB_HOLE_Y = 21.0; +UWB_USBC_W = 9.5; +UWB_USBC_H = 4.0; +UWB_ANTENNA_L = 20.0; -// ── Wall base geometry ──────────────────────────────────────────────────────── -BASE_W = 60.0; -BASE_H = 50.0; -BASE_T = 5.0; -BASE_SCREW_D = 4.5; // M4 clearance -BASE_SCREW_HD = 8.5; // countersink OD -BASE_SCREW_HH = 3.5; // countersink depth -BASE_SCREW_SPC = 35.0; // Z span between screw holes -KNUCKLE_T = BASE_T + 4.0; // pivot ear depth (Y) +// -- Wall base geometry ------------------------------------------------------- +BASE_W = 60.0; +BASE_H = 50.0; +BASE_T = 5.0; +BASE_SCREW_D = 4.5; +BASE_SCREW_HD = 8.5; +BASE_SCREW_HH = 3.5; +BASE_SCREW_SPC = 35.0; +KNUCKLE_T = BASE_T + 4.0; -// ── Tilt arm geometry ───────────────────────────────────────────────────────── +// -- Tilt arm geometry -------------------------------------------------------- ARM_W = 12.0; ARM_T = 5.0; ARM_L = 35.0; -PIVOT_D = 3.3; // M3 clearance +PIVOT_D = 3.3; PIVOT_NUT_AF = 5.5; PIVOT_NUT_H = 2.4; -DETENT_D = 3.2; // detent notch diameter -DETENT_R = 8.0; // detent notch radius from pivot +DETENT_D = 3.2; +DETENT_R = 8.0; -// ── Anchor cradle geometry ──────────────────────────────────────────────────── +// -- Anchor cradle geometry --------------------------------------------------- CRADLE_WALL_T = 3.5; CRADLE_BACK_T = 4.0; CRADLE_FLOOR_T = 3.0; @@ -104,19 +104,19 @@ STANDOFF_H = 3.0; STANDOFF_OD = 5.5; LABEL_W = UWB_L - 4.0; LABEL_H = UWB_W * 0.55; -LABEL_T = 1.2; // label card thickness +LABEL_T = 1.2; -// ── USB-C cable routing ─────────────────────────────────────────────────────── +// -- USB-C routing ------------------------------------------------------------ USBC_CHAN_W = 11.0; USBC_CHAN_H = 7.0; -// ── Cable clip ──────────────────────────────────────────────────────────────── +// -- Cable clip --------------------------------------------------------------- CLIP_CABLE_D = 4.5; CLIP_T = 2.0; CLIP_BODY_W = 16.0; CLIP_BODY_H = 10.0; -// ── Fasteners ───────────────────────────────────────────────────────────────── +// -- Fasteners ---------------------------------------------------------------- M2P5_D = 2.7; M3_D = 3.3; M3_NUT_AF = 5.5; @@ -137,61 +137,35 @@ else if (RENDER == "cable_clip_stl") cable_clip(); // ASSEMBLY PREVIEW // ============================================================ module assembly_preview() { - // Ghost wall surface %color("Wheat", 0.22) translate([-BASE_W/2, -10, -BASE_H/2]) cube([BASE_W, 10, BASE_H + 40]); - - // Wall base - color("OliveDrab", 0.85) - wall_base(); - - // Tilt arm at TILT_DEG, pivoting at knuckle + color("OliveDrab", 0.85) wall_base(); color("SteelBlue", 0.85) - translate([0, KNUCKLE_T, 0]) - rotate([TILT_DEG, 0, 0]) - tilt_arm(); - - // Anchor cradle at arm end + translate([0, KNUCKLE_T, 0]) rotate([TILT_DEG,0,0]) tilt_arm(); color("DarkSlateGray", 0.85) - translate([0, KNUCKLE_T, 0]) - rotate([TILT_DEG, 0, 0]) - translate([0, ARM_T, ARM_L]) - anchor_cradle(); - - // PCB ghost + translate([0, KNUCKLE_T, 0]) rotate([TILT_DEG,0,0]) + translate([0, ARM_T, ARM_L]) anchor_cradle(); %color("ForestGreen", 0.38) - translate([0, KNUCKLE_T, 0]) - rotate([TILT_DEG, 0, 0]) - translate([-UWB_L/2, - ARM_T + CRADLE_BACK_T, - ARM_L + CRADLE_FLOOR_T + STANDOFF_H]) - cube([UWB_L, UWB_W, UWB_H]); - - // Cable clip at arm mid-point + translate([0, KNUCKLE_T, 0]) rotate([TILT_DEG,0,0]) + translate([-UWB_L/2, ARM_T+CRADLE_BACK_T, + ARM_L+CRADLE_FLOOR_T+STANDOFF_H]) + cube([UWB_L, UWB_W, UWB_H]); color("DimGray", 0.70) - translate([ARM_W/2, KNUCKLE_T, 0]) - rotate([TILT_DEG, 0, 0]) - translate([0, ARM_T + e, ARM_L/2]) - rotate([0, -90, 90]) - cable_clip(); + translate([ARM_W/2, KNUCKLE_T, 0]) rotate([TILT_DEG,0,0]) + translate([0, ARM_T+e, ARM_L/2]) rotate([0,-90,90]) cable_clip(); } // ============================================================ -// PART 1 — WALL BASE +// PART 1 -- WALL BASE // ============================================================ -// Flat backplate screws to wall or ceiling with 2× countersunk -// M4/#6 wood screws on BASE_SCREW_SPC (35 mm) centres. -// Two pivot ears straddle the tilt arm; M3 pivot bolt passes through -// both ears and arm knuckle. -// Detent arc on inner face of +X ear: 7 notches at 15° steps (0–90°) -// so tilt can be set without a protractor. -// Shallow rear recess accepts a printed installation-zone label. +// Flat backplate, 2x countersunk M4/#6 wood screws on 35mm centres. +// Two pivot ears straddle the tilt arm; M3 pivot bolt through both. +// Detent arc on +X ear inner face: 7 notches at 15deg steps (0-90deg). +// Shallow rear recess for installation-zone label strip. +// Same part for wall mount and ceiling mount. // -// Dual-use: flat face to wall (vertical screw axis) or flat face -// to ceiling (horizontal screw axis) — same part either way. -// -// Print: backplate flat on bed, PETG, 5 perims, 40 % gyroid. +// Print: backplate flat on bed, PETG, 5 perims, 40% gyroid. module wall_base() { ear_h = ARM_W + 3.0; ear_t = 6.0; @@ -199,144 +173,92 @@ module wall_base() { difference() { union() { - // ── Backplate ──────────────────────────────────────────────── translate([-BASE_W/2, -BASE_T, -BASE_H/2]) cube([BASE_W, BASE_T, BASE_H]); - - // ── Two pivot ears ──────────────────────────────────────────── for (ex = [-(ear_sep/2 + ear_t), ear_sep/2]) - translate([ex, -BASE_T + e, -ear_h/2]) - cube([ear_t, KNUCKLE_T + e, ear_h]); - - // ── Stiffening gussets ──────────────────────────────────────── + translate([ex, -BASE_T+e, -ear_h/2]) + cube([ear_t, KNUCKLE_T+e, ear_h]); for (ex = [-(ear_sep/2 + ear_t), ear_sep/2]) hull() { translate([ex, -BASE_T, -ear_h/4]) - cube([ear_t, BASE_T - 1, ear_h/2]); - translate([ex + (ex < 0 ? ear_t*0.6 : 0), - -BASE_T, -ear_h/6]) - cube([ear_t * 0.4, 1, ear_h/3]); + cube([ear_t, BASE_T-1, ear_h/2]); + translate([ex + (ex<0 ? ear_t*0.5 : 0), -BASE_T, -ear_h/6]) + cube([ear_t*0.5, 1, ear_h/3]); } } - - // ── 2× countersunk wall screws ──────────────────────────────────── for (sz = [-BASE_SCREW_SPC/2, BASE_SCREW_SPC/2]) { - translate([0, -BASE_T - e, sz]) - rotate([-90, 0, 0]) - cylinder(d = BASE_SCREW_D, h = BASE_T + 2*e); - translate([0, -BASE_T - e, sz]) - rotate([-90, 0, 0]) - cylinder(d1 = BASE_SCREW_HD, d2 = BASE_SCREW_D, - h = BASE_SCREW_HH + e); + translate([0, -BASE_T-e, sz]) rotate([-90,0,0]) + cylinder(d=BASE_SCREW_D, h=BASE_T+2*e); + translate([0, -BASE_T-e, sz]) rotate([-90,0,0]) + cylinder(d1=BASE_SCREW_HD, d2=BASE_SCREW_D, h=BASE_SCREW_HH+e); } - - // ── Pivot bolt bore (M3, through both ears) ─────────────────────── - translate([-(ear_sep/2 + ear_t + e), KNUCKLE_T * 0.55, 0]) - rotate([0, 90, 0]) - cylinder(d = PIVOT_D, h = ear_sep + 2*ear_t + 2*e); - - // ── M3 nyloc nut pocket (outer face of one ear) ─────────────────── - translate([ear_sep/2 + ear_t - PIVOT_NUT_H - 0.4, - KNUCKLE_T * 0.55, 0]) - rotate([0, 90, 0]) - cylinder(d = PIVOT_NUT_AF / cos(30), - h = PIVOT_NUT_H + 0.5, $fn = 6); - - // ── Detent arc — 7 notches at 15° steps on +X ear inner face ───── + translate([-(ear_sep/2+ear_t+e), KNUCKLE_T*0.55, 0]) + rotate([0,90,0]) cylinder(d=PIVOT_D, h=ear_sep+2*ear_t+2*e); + translate([ear_sep/2+ear_t-PIVOT_NUT_H-0.4, KNUCKLE_T*0.55, 0]) + rotate([0,90,0]) + cylinder(d=PIVOT_NUT_AF/cos(30), h=PIVOT_NUT_H+0.5, $fn=6); for (da = [0 : 15 : 90]) - translate([ear_sep/2 - e, - KNUCKLE_T * 0.55 + DETENT_R * sin(da), - DETENT_R * cos(da)]) - rotate([0, 90, 0]) - cylinder(d = DETENT_D, h = ear_t * 0.45 + e); - - // ── Installation label recess (rear face of backplate) ──────────── - translate([0, -BASE_T - e, 0]) - rotate([-90, 0, 0]) - cube([BASE_W - 12, BASE_H - 16, 1.6], center = true); - - // ── Lightening pocket ───────────────────────────────────────────── - translate([0, -BASE_T + 1.5, 0]) - cube([BASE_W - 14, BASE_T - 3, BASE_H - 20], center = true); + translate([ear_sep/2-e, + KNUCKLE_T*0.55 + DETENT_R*sin(da), + DETENT_R*cos(da)]) + rotate([0,90,0]) cylinder(d=DETENT_D, h=ear_t*0.45+e); + translate([0, -BASE_T-e, 0]) rotate([-90,0,0]) + cube([BASE_W-12, BASE_H-16, 1.6], center=true); + translate([0, -BASE_T+1.5, 0]) + cube([BASE_W-14, BASE_T-3, BASE_H-20], center=true); } } // ============================================================ -// PART 2 — TILT ARM +// PART 2 -- TILT ARM // ============================================================ -// Pivoting arm linking wall_base pivot ears to anchor_cradle. -// Knuckle end (Z=0): M3 pivot bore + spring-plunger detent pocket -// that indexes into the base ear detent arc notches. -// Cradle end (Z=ARM_L): 2× M3 bolt attachment to cradle back wall. -// USB-C cable channel runs along outer (+Y) face, full arm length. +// Pivoting arm linking wall_base ears to anchor_cradle. +// Knuckle (Z=0): M3 pivot bore + spring-plunger detent pocket (3mm). +// Cradle end (Z=ARM_L): 2x M3 bolt attachment stub. +// USB-C cable channel groove on outer +Y face, full arm length. // -// Print: knuckle face flat on bed, PETG, 5 perims, 40 % gyroid. +// Print: knuckle face flat on bed, PETG, 5 perims, 40% gyroid. module tilt_arm() { total_h = ARM_L + 10; - difference() { union() { - // ── Arm body ───────────────────────────────────────────────── - translate([-ARM_W/2, 0, 0]) - cube([ARM_W, ARM_T, total_h]); - - // ── Knuckle boss (rounded pivot end) ───────────────────────── - translate([0, ARM_T/2, 0]) - rotate([90, 0, 0]) - cylinder(d = ARM_W, h = ARM_T, center = true); - - // ── Cradle attach stub (Z = ARM_L) ──────────────────────────── + translate([-ARM_W/2, 0, 0]) cube([ARM_W, ARM_T, total_h]); + translate([0, ARM_T/2, 0]) rotate([90,0,0]) + cylinder(d=ARM_W, h=ARM_T, center=true); translate([-ARM_W/2, 0, ARM_L]) - cube([ARM_W, ARM_T + CRADLE_BACK_T, ARM_T]); + cube([ARM_W, ARM_T+CRADLE_BACK_T, ARM_T]); } - - // ── M3 pivot bore ───────────────────────────────────────────────── - translate([-ARM_W/2 - e, ARM_T/2, 0]) - rotate([0, 90, 0]) - cylinder(d = PIVOT_D, h = ARM_W + 2*e); - - // ── Detent plunger pocket (3 mm spring-ball, outer +Y face) ────── - translate([0, ARM_T + e, 0]) - rotate([90, 0, 0]) - cylinder(d = 3.2, h = 4 + e); - - // ── USB-C cable channel (outer +Y face, mid-arm length) ─────────── - translate([-USBC_CHAN_W/2, ARM_T - e, ARM_T + 4]) - cube([USBC_CHAN_W, USBC_CHAN_H, ARM_L - ARM_T - 8]); - - // ── Cradle attach bolt holes (2× M3 at cradle stub) ─────────────── + translate([-ARM_W/2-e, ARM_T/2, 0]) rotate([0,90,0]) + cylinder(d=PIVOT_D, h=ARM_W+2*e); + translate([0, ARM_T+e, 0]) rotate([90,0,0]) + cylinder(d=3.2, h=4+e); + translate([-USBC_CHAN_W/2, ARM_T-e, ARM_T+4]) + cube([USBC_CHAN_W, USBC_CHAN_H, ARM_L-ARM_T-8]); for (bx = [-ARM_W/4, ARM_W/4]) - translate([bx, ARM_T/2, ARM_L + ARM_T/2]) - rotate([90, 0, 0]) - cylinder(d = M3_D, h = ARM_T + CRADLE_BACK_T + 2*e); - - // ── M3 nut pockets (front of cradle stub) ───────────────────────── + translate([bx, ARM_T/2, ARM_L+ARM_T/2]) rotate([90,0,0]) + cylinder(d=M3_D, h=ARM_T+CRADLE_BACK_T+2*e); for (bx = [-ARM_W/4, ARM_W/4]) - translate([bx, ARM_T/2, ARM_L + ARM_T/2]) - rotate([-90, 0, 0]) - cylinder(d = M3_NUT_AF / cos(30), - h = M3_NUT_H + 0.5, $fn = 6); - - // ── Lightening pocket ───────────────────────────────────────────── + translate([bx, ARM_T/2, ARM_L+ARM_T/2]) rotate([-90,0,0]) + cylinder(d=M3_NUT_AF/cos(30), h=M3_NUT_H+0.5, $fn=6); translate([0, ARM_T/2, ARM_L/2]) - cube([ARM_W - 4, ARM_T - 2, ARM_L - 18], center = true); + cube([ARM_W-4, ARM_T-2, ARM_L-18], center=true); } } // ============================================================ -// PART 3 — ANCHOR CRADLE +// PART 3 -- ANCHOR CRADLE // ============================================================ // Open-front U-cradle for ESP32 UWB Pro PCB. -// PCB retained on 4× M2.5 standoffs matching UWB_HOLE_X × UWB_HOLE_Y. -// Back wall features: -// • USB-C exit slot — aligns with PCB USB-C port -// • USB-C groove — cable routes from slot toward arm channel -// • Label card slot — insert printed strip for anchor ID -// • Antenna keep-out — back wall material removed above antenna area -// Front lip prevents PCB from sliding forward. -// Two attachment tabs bolt to tilt_arm cradle stub. +// 4x M2.5 standoffs on UWB_HOLE_X x UWB_HOLE_Y pattern. +// Back wall: USB-C exit slot + routing groove, label card slot, +// antenna keep-out cutout (material removed above antenna area). +// Front retaining lip prevents PCB sliding out. +// Two attachment tabs bolt to tilt_arm cradle stub via M3. // -// Print: back wall flat on bed, PETG, 5 perims, 40 % gyroid. +// Label card slot: insert paper/laminate strip to ID this anchor +// (e.g. "UWB-A3 NE-CORNER"), accessible from open cradle end. +// +// Print: back wall flat on bed, PETG, 5 perims, 40% gyroid. module anchor_cradle() { outer_l = UWB_L + 2*CRADLE_WALL_T; outer_w = UWB_W + CRADLE_FLOOR_T; @@ -345,119 +267,75 @@ module anchor_cradle() { difference() { union() { - // ── Cradle body ─────────────────────────────────────────────── - translate([-outer_l/2, 0, 0]) - cube([outer_l, outer_w, total_z]); - - // ── Front retaining lip ─────────────────────────────────────── - translate([-outer_l/2, outer_w - CRADLE_LIP_T, 0]) + translate([-outer_l/2, 0, 0]) cube([outer_l, outer_w, total_z]); + translate([-outer_l/2, outer_w-CRADLE_LIP_T, 0]) cube([outer_l, CRADLE_LIP_T, CRADLE_LIP_H]); - - // ── Arm attachment tabs (behind back wall) ───────────────────── for (tx = [-ARM_W/4, ARM_W/4]) - translate([tx - 4, -CRADLE_BACK_T, 0]) - cube([8, CRADLE_BACK_T + 1, total_z]); + translate([tx-4, -CRADLE_BACK_T, 0]) + cube([8, CRADLE_BACK_T+1, total_z]); } - - // ── PCB pocket ──────────────────────────────────────────────────── - translate([-UWB_L/2, 0, pcb_z]) - cube([UWB_L, UWB_W + 1, UWB_H + 4]); - - // ── USB-C exit slot (through back wall, aligned to PCB port) ───── - translate([0, -CRADLE_BACK_T - e, - pcb_z + UWB_H/2 - UWB_USBC_H/2]) - cube([UWB_USBC_W + 2, CRADLE_BACK_T + 2*e, UWB_USBC_H + 2], - center = [true, false, false]); - - // ── USB-C cable routing groove (outer back wall face) ───────────── - translate([0, -CRADLE_BACK_T - e, -e]) - cube([USBC_CHAN_W, USBC_CHAN_H, pcb_z + UWB_H/2 + USBC_CHAN_H], - center = [true, false, false]); - - // ── Label card slot (insert from below, rear face upper half) ───── - // Paper/laminate card strip identifying this anchor instance - translate([0, -CRADLE_BACK_T - e, pcb_z + UWB_H/2]) - cube([LABEL_W, LABEL_T + 0.3, LABEL_H], - center = [true, false, false]); - - // ── Antenna keep-out: remove back wall above antenna area ───────── - translate([0, -e, pcb_z + UWB_H - UWB_ANTENNA_L]) - cube([UWB_L - 4, CRADLE_BACK_T + 2*e, UWB_ANTENNA_L + 4], - center = [true, false, false]); - - // ── Arm bolt holes through attachment tabs ──────────────────────── + translate([-UWB_L/2, 0, pcb_z]) cube([UWB_L, UWB_W+1, UWB_H+4]); + translate([0, -CRADLE_BACK_T-e, pcb_z+UWB_H/2-UWB_USBC_H/2]) + cube([UWB_USBC_W+2, CRADLE_BACK_T+2*e, UWB_USBC_H+2], + center=[true,false,false]); + translate([0, -CRADLE_BACK_T-e, -e]) + cube([USBC_CHAN_W, USBC_CHAN_H, pcb_z+UWB_H/2+USBC_CHAN_H], + center=[true,false,false]); + translate([0, -CRADLE_BACK_T-e, pcb_z+UWB_H/2]) + cube([LABEL_W, LABEL_T+0.3, LABEL_H], center=[true,false,false]); + translate([0, -e, pcb_z+UWB_H-UWB_ANTENNA_L]) + cube([UWB_L-4, CRADLE_BACK_T+2*e, UWB_ANTENNA_L+4], + center=[true,false,false]); for (tx = [-ARM_W/4, ARM_W/4]) - translate([tx, ARM_T/2 - CRADLE_BACK_T, total_z/2]) - rotate([-90, 0, 0]) - cylinder(d = M3_D, h = ARM_T + CRADLE_BACK_T + 2*e); - - // ── Lightening slots in side walls ──────────────────────────────── - for (side_x = [-outer_l/2 - e, outer_l/2 - CRADLE_WALL_T - e]) - translate([side_x, 2, pcb_z + 2]) - cube([CRADLE_WALL_T + 2*e, UWB_W - 4, UWB_H - 4]); + translate([tx, ARM_T/2-CRADLE_BACK_T, total_z/2]) + rotate([-90,0,0]) + cylinder(d=M3_D, h=ARM_T+CRADLE_BACK_T+2*e); + for (side_x = [-outer_l/2-e, outer_l/2-CRADLE_WALL_T-e]) + translate([side_x, 2, pcb_z+2]) + cube([CRADLE_WALL_T+2*e, UWB_W-4, UWB_H-4]); } - - // ── M2.5 standoff bosses (positive, inside cradle floor) ────────────── for (hx = [-UWB_HOLE_X/2, UWB_HOLE_X/2]) - for (hy = [(outer_w - UWB_W)/2 + (UWB_W - UWB_HOLE_Y)/2, - (outer_w - UWB_W)/2 + (UWB_W - UWB_HOLE_Y)/2 + UWB_HOLE_Y]) + for (hy = [(outer_w-UWB_W)/2 + (UWB_W-UWB_HOLE_Y)/2, + (outer_w-UWB_W)/2 + (UWB_W-UWB_HOLE_Y)/2 + UWB_HOLE_Y]) difference() { - translate([hx, hy, CRADLE_FLOOR_T - e]) - cylinder(d = STANDOFF_OD, h = STANDOFF_H + e); - translate([hx, hy, CRADLE_FLOOR_T - 2*e]) - cylinder(d = M2P5_D, h = STANDOFF_H + 4); + translate([hx, hy, CRADLE_FLOOR_T-e]) + cylinder(d=STANDOFF_OD, h=STANDOFF_H+e); + translate([hx, hy, CRADLE_FLOOR_T-2*e]) + cylinder(d=M2P5_D, h=STANDOFF_H+4); } } // ============================================================ -// PART 4 — CABLE CLIP +// PART 4 -- CABLE CLIP // ============================================================ // Snap-on C-clip retaining USB-C cable along tilt arm outer face. -// Presses onto ARM_T-wide arm with PETG snap tongues. -// Open-front cable channel for push-in cable insertion. -// Print ×2–3 per anchor, spaced 25 mm along arm. +// Presses onto ARM_T-wide arm with flexible PETG snap tongues. +// Print x2-3 per anchor, spaced 25mm along arm. // -// Print: clip-opening face down, PETG, 3 perims, 20 % infill. +// Print: clip-opening face down, PETG, 3 perims, 20% infill. module cable_clip() { ch_r = CLIP_CABLE_D/2 + CLIP_T; snap_t = 1.6; - difference() { union() { - // ── Body plate ──────────────────────────────────────────────── translate([-CLIP_BODY_W/2, 0, 0]) cube([CLIP_BODY_W, CLIP_T, CLIP_BODY_H]); - - // ── Cable channel (C-shape, opens toward +Y) ───────────────── - translate([0, CLIP_T + ch_r, CLIP_BODY_H/2]) - rotate([0, 90, 0]) - difference() { - cylinder(r = ch_r, h = CLIP_BODY_W, center = true); - cylinder(r = CLIP_CABLE_D/2, - h = CLIP_BODY_W + 2*e, center = true); - // open insertion slot - translate([0, ch_r + e, 0]) - cube([CLIP_CABLE_D * 0.85, - ch_r * 2 + 2*e, - CLIP_BODY_W + 2*e], center = true); - } - - // ── Snap tongues (straddle arm, -Y side of body) ───────────── - for (tx = [-CLIP_BODY_W/2 + 1.5, - CLIP_BODY_W/2 - 1.5 - snap_t]) - translate([tx, -ARM_T - 1, 0]) - cube([snap_t, ARM_T + 1 + CLIP_T, CLIP_BODY_H]); - - // ── Snap barbs ──────────────────────────────────────────────── - for (tx = [-CLIP_BODY_W/2 + 1.5, - CLIP_BODY_W/2 - 1.5 - snap_t]) - translate([tx + snap_t/2, -ARM_T - 1, CLIP_BODY_H/2]) - rotate([0, 90, 0]) - cylinder(d = 2, h = snap_t, center = true); + translate([0, CLIP_T+ch_r, CLIP_BODY_H/2]) rotate([0,90,0]) + difference() { + cylinder(r=ch_r, h=CLIP_BODY_W, center=true); + cylinder(r=CLIP_CABLE_D/2, h=CLIP_BODY_W+2*e, center=true); + translate([0, ch_r+e, 0]) + cube([CLIP_CABLE_D*0.85, ch_r*2+2*e, CLIP_BODY_W+2*e], + center=true); + } + for (tx = [-CLIP_BODY_W/2+1.5, CLIP_BODY_W/2-1.5-snap_t]) + translate([tx, -ARM_T-1, 0]) + cube([snap_t, ARM_T+1+CLIP_T, CLIP_BODY_H]); + for (tx = [-CLIP_BODY_W/2+1.5, CLIP_BODY_W/2-1.5-snap_t]) + translate([tx+snap_t/2, -ARM_T-1, CLIP_BODY_H/2]) + rotate([0,90,0]) cylinder(d=2, h=snap_t, center=true); } - - // ── Arm slot (arm body passes between tongues) ───────────────────── - translate([0, -ARM_T - 1 - e, CLIP_BODY_H/2]) - cube([CLIP_BODY_W - 6, ARM_T + 2, CLIP_BODY_H - 4], center = true); + translate([0, -ARM_T-1-e, CLIP_BODY_H/2]) + cube([CLIP_BODY_W-6, ARM_T+2, CLIP_BODY_H-4], center=true); } }