sl-mechanical
23f2daa3cd
Part of Phase 2 sensor mount designs for SaltyBot 25 mm mast. Files added: chassis/sensor_head.scad — split collar (25 mm OD stem) + octagonal platform chassis/rplidar_mount.scad — anti-vibration ring for RPLIDAR A1M8 (Ø58 mm BC) chassis/realsense_mount.scad — RealSense D435i arm bracket, 10° tilt, 1/4-20 nut chassis/imx219_mount.scad — 4× IMX219 radial arms, 10° tilt, CSI ribbon slot chassis/sensor_head_assembly.md — assembly diagram + fastener BOM + print settings Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
105 lines
4.8 KiB
OpenSCAD
105 lines
4.8 KiB
OpenSCAD
// ============================================================
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// imx219_mount.scad — IMX219 Camera Radial Arm Rev A
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// Agent: sl-mechanical 2026-02-28
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// ============================================================
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// Radial arm bracket for 32×32 mm IMX219 camera PCB.
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// 4× arms at 0/90/180/270° around the sensor_head platform.
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// Camera face tilted 10° nose-down. CSI ribbon slot along arm.
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//
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// Print: one arm at a time, flat-side-down — no supports.
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//
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// RENDER options:
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// "arm" single arm for slicing (default)
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// "assembly" all 4 arms positioned around origin
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// ============================================================
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RENDER = "arm";
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// ── Camera PCB (IMX219, 32×32 mm) ────────────────────────────
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PCB_SIZE = 32.0; // PCB square side
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// M2 hole pattern: 24×24 mm square (±12 mm from centre)
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M2_SPACING = 24.0;
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M2_D = 2.4; // M2 clearance hole
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// ── Arm geometry ─────────────────────────────────────────────
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// Arm is centred on Y=0, extends in +X direction from origin.
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// Base attachment holes near X=0; camera face plate at X=REACH_LEN.
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ARM_W = 26.0; // arm width (Y direction, centred)
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ARM_H = 5.0; // arm thickness (Z direction)
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// Must match sensor_head.scad ARM_R and ARM_DY_CAM
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ARM_R = 50.0; // platform attachment radius (used in assembly view)
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ARM_DY = 9.0; // half-spacing of M4 base attachment holes (Y axis)
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ARM_BOLT_X = 8.0; // base bolt CL from arm base (X)
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REACH_LEN = 52.0; // arm extension (X)
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FACE_SZ = PCB_SIZE + 6.0; // camera face plate side (38 mm)
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FACE_THICK = 4.0; // face plate thickness (X)
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TILT = 10.0; // nose-down tilt angle (degrees)
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// CSI ribbon slot — runs along bottom face of arm
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CSI_W = 16.0; // ribbon clearance width
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CSI_H = 2.0; // slot depth
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// ── Fasteners ─────────────────────────────────────────────────
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M4_D = 4.5; // M4 clearance hole
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$fn = 64;
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e = 0.01;
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// ─────────────────────────────────────────────────────────────
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// imx219_arm()
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// Arm centred on Y=0. Base at X=0, tip at X=REACH_LEN.
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// ─────────────────────────────────────────────────────────────
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module imx219_arm() {
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difference() {
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union() {
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// Arm body — centred on Y axis
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translate([0, -ARM_W/2, 0])
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cube([REACH_LEN, ARM_W, ARM_H]);
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// Camera face plate at tip, tilted TILT° nose-down
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translate([REACH_LEN, 0, ARM_H/2])
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rotate([0, TILT, 0])
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translate([0, -FACE_SZ/2, -FACE_SZ/2])
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cube([FACE_THICK, FACE_SZ, FACE_SZ]);
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}
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// ── 2× M4 base attachment holes ───────────────────────
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for (s = [-1, 1])
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translate([ARM_BOLT_X, s * ARM_DY, -e])
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cylinder(d = M4_D, h = ARM_H + 2*e);
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// ── CSI ribbon slot — bottom face of arm ──────────────
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translate([REACH_LEN * 0.2, -CSI_W/2, -e])
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cube([REACH_LEN * 0.6, CSI_W, CSI_H + e]);
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// ── 4× M2 camera PCB holes on face plate ─────────────
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translate([REACH_LEN, 0, ARM_H/2])
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rotate([0, TILT, 0])
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for (dy = [-M2_SPACING/2, M2_SPACING/2])
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for (dz = [-M2_SPACING/2, M2_SPACING/2])
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translate([-e, dy, dz])
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rotate([0, 90, 0])
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cylinder(d = M2_D, h = FACE_THICK + 2*e);
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}
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}
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// ─────────────────────────────────────────────────────────────
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// Render selector
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// ─────────────────────────────────────────────────────────────
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if (RENDER == "arm") {
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imx219_arm();
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} else if (RENDER == "assembly") {
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// 4 arms at 90° intervals, base at ARM_R from stem CL
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for (a = [0, 90, 180, 270])
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rotate([0, 0, a])
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translate([ARM_R, 0, 0])
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color("SkyBlue", 0.9)
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imx219_arm();
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}
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