feat(case): add parametric 3D-printed enclosure concept
Typewriter-body OpenSCAD model for the GDEY0579T93 panel and ESP32-S3-DevKitC-1: glueless screen retention (bezel lip + foam gasket + screwed bracket), baseplate-as-chassis board mounting, and a recessed deck nameplate. Ships render previews, a dimensioned concept drawing, and just recipes to open/render/export.
This commit is contained in:
Julien Calixte
277
hardware/case/typoena-case.scad
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277
hardware/case/typoena-case.scad
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// ============================================================================
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// Typoena — 3D-printed enclosure · "typewriter body" · rev v0 (concept)
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// ----------------------------------------------------------------------------
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// A shallow sage wedge. The e-paper strip sits on a reclined deck where a
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// typewriter's sheet of paper would be; the keyboard you bring rests in front.
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// No platen part (keeps the print simple) — the rounded back-top edge is a
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// subtle roll that nods to one for free.
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//
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// Everything here is PARAMETRIC. Numbers that come from a datasheet are noted;
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// numbers marked << MEASURE >> are best-guesses you must confirm against the
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// real board / breakout before printing a final.
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//
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// Units: millimetres. Render: see hardware/case/README.md
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//
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// Parts (set `show` below):
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// "assembled" – everything in place, coloured (screen ghosted in)
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// "body" – the shell only (print deck-up or on its back)
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// "bracket" – the screen retaining frame (print flat)
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// "baseplate" – the chassis / bottom cover (print flat)
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// "print_plate" – all printed parts laid out side by side
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// ============================================================================
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show = "assembled";
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$fn = 48;
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// ---- body envelope --------------------------------------------------------
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W = 176; // width (X) — screen 150.9 + bezel + walls
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D = 104; // depth (Y) — front (keyboard) .. back (ports)
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Hf = 24; // height at the FRONT edge
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Hb = 58; // height at the BACK edge (Hf<Hb makes the reclined deck)
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wall = 2.4; // side/back wall thickness
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top_wall = 2.6; // deck thickness (before the bezel lip is cut into it)
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corner_r = 8; // rounded vertical + top-edge radius (the "machined" look)
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// deck slope, derived from the pillar centres (this is the *true* top plane)
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theta = atan((Hb - Hf) / (D - 2*corner_r)); // ~21 deg with the defaults
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// >> THE ergonomics dial. Raise Hb for a more vertical, easier-to-read screen;
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// lower it for a flatter, more typewriter-like deck. 18-22 deg = shallow,
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// 28-35 deg reads better when you're sitting close.
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// ---- e-paper panel : GDEY0579T93 (datasheet) ------------------------------
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G_w = 150.92; G_h = 56.94; G_t = 1.0; // glass outline W x H x thickness
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A_w = 139.00; A_h = 47.74; // active area (must stay uncovered)
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// NOTE: the real panel's active area is offset toward the FPC edge — this model
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// centres it. << MEASURE >> your panel's border and shift screen_off if needed.
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screen_off = 0; // extra X/Y active-area offset
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// ---- screen retention (glueless) ------------------------------------------
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lip_over = 4.0; // how far the front bezel lip overlaps the glass border
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lip_t = 1.4; // deck material left in FRONT of the glass (the visible lip)
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glass_gap = 0.5; // clearance around the glass in its pocket
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foam_t = 1.0; // non-adhesive closed-cell foam gasket behind the glass
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bracket_t = 2.6; // printed retaining frame thickness
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fpc_w = 26; // width of the ribbon slot on the up-slope edge
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// ---- deck nameplate (engraved, faces the user) ----------------------------
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name_text = "TYPOENA";
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name_size = 6.5; // cap height in mm
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name_depth = 0.8; // engrave depth — raise for a bolder, deeper cut
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name_font = "Monaspace Krypton"; // install once — see README (Nameplate font)
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A_ap_w = A_w + 2; // through-aperture (a hair bigger than active)
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A_ap_h = A_h + 1; // still smaller than glass minus 2*lip
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P_w = G_w + glass_gap; // glass pocket (locates the glass in X/Y)
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P_h = G_h + glass_gap;
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// screen placed centred on the deck (measured up the slope)
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deck_L = (D - 2*corner_r) / cos(theta); // deck length along the slope
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screen_cy = deck_L/2; // centre it
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boss_r = 3.4; // M2 self-tap boss for the bracket
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// ---- ports on the back wall (ESP32-S3-DevKitC-1 edge) --------------------
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port_z = 7; // height of the port centres off the desk << MEASURE >>
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usbc_w = 9.6; usbc_h = 3.6; // USB-C opening (with clearance)
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sd_w = 12; sd_h = 2.4; // microSD slot
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// X positions of the three openings along the back << MEASURE to your board >>
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port_x = [W/2 - 15, W/2, W/2 + 17]; // usb-c (kbd), usb-c (power), µSD
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// ---- baseplate / chassis --------------------------------------------------
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bp_t = 2.6; // baseplate thickness
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bp_gap = 0.5; // clearance so it drops into the shell
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foot_r = 7; // round feet (the little typewriter feet)
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foot_h = 3.5;
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post_r = 4.2; // corner screw posts inside the shell (M2.5 self-tap)
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post_pilot = 1.15;
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// board mounting standoffs on the baseplate << MEASURE hole positions >>
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standoff_h = 6;
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standoff_pilot = 1.15;
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// ESP32-S3-DevKitC-1 is ~70 x 28 mm; these are PLACEHOLDER hole coords:
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esp_holes = [[W/2-33, 30],[W/2+33, 30],[W/2-33, 54],[W/2+33, 54]];
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// DESPI-C579 breakout sits behind the screen — PLACEHOLDER:
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brk_holes = [[W/2-20, 78],[W/2+20, 78]];
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// ---- colours (for the assembled render) -----------------------------------
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C_body = "#130f40"; // deep indigo (chosen)
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C_plate = "#C9C3B2";
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C_bracket= "#2B2B2B";
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C_screen = "#F7F4EA";
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// ===========================================================================
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// helpers
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// ===========================================================================
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module rrect(w, d, r) { // 2D rounded rectangle, centred
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hull() for (mx=[-1,1], my=[-1,1])
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translate([mx*(w/2-r), my*(d/2-r)]) circle(r=r);
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}
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// place children onto the reclined deck plane. Origin at the FRONT-TOP edge
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// (world y=0, z=Hf) — where the true hull top surface actually begins; anchor
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// it at the pillar centre instead and everything lands ~3mm below the surface.
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// local frame: X = width, Y = up the slope, Z = out of the deck (normal).
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module on_deck() {
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translate([W/2, 0, Hf]) rotate([theta, 0, 0]) children();
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}
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// ===========================================================================
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// body
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// ===========================================================================
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module body_outer() {
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hull() {
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translate([corner_r, corner_r, 0]) cylinder(h=Hf, r=corner_r);
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translate([W-corner_r, corner_r, 0]) cylinder(h=Hf, r=corner_r);
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translate([corner_r, D-corner_r, 0]) cylinder(h=Hb, r=corner_r);
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translate([W-corner_r, D-corner_r, 0]) cylinder(h=Hb, r=corner_r);
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}
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}
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module body_cavity() {
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ri = corner_r - wall;
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hull() {
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translate([corner_r, corner_r, -3]) cylinder(h=Hf-top_wall+3, r=ri);
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translate([W-corner_r, corner_r, -3]) cylinder(h=Hf-top_wall+3, r=ri);
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translate([corner_r, D-corner_r, -3]) cylinder(h=Hb-top_wall+3, r=ri);
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translate([W-corner_r, D-corner_r, -3]) cylinder(h=Hb-top_wall+3, r=ri);
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}
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}
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// 4 corner posts the baseplate screws up into
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module corner_posts() {
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for (px=[corner_r+3, W-corner_r-3], py=[corner_r+3, D-corner_r-3]) {
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h = (py < D/2) ? Hf-top_wall : Hb-top_wall;
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translate([px, py, 0]) difference() {
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cylinder(h=h, r=post_r);
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translate([0,0,-1]) cylinder(h=h+2, r=post_pilot);
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}
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}
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}
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// 4 bosses just OUTSIDE the glass pocket for the retaining bracket
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module bracket_bosses() {
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on_deck() for (bx=[-(P_w/2+5), P_w/2+5],
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by=[screen_cy-(P_h/2+5), screen_cy+(P_h/2+5)]) {
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blen = lip_t + G_t + foam_t + bracket_t + 6;
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translate([bx, by, -lip_t-blen]) difference() {
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cylinder(h=blen, r=boss_r);
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translate([0,0,-1]) cylinder(h=blen+2, r=1.0); // M2 self-tap
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}
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}
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}
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// deck cuts: through-aperture, glass pocket (leaves the front lip), FPC slot
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module screen_cuts() {
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on_deck() translate([screen_off, screen_cy + screen_off, 0]) {
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// window
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translate([0,0,-30]) cube([A_ap_w, A_ap_h, 66], center=true);
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// glass pocket behind the lip
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translate([0,0,-30-lip_t]) cube([P_w, P_h, 60], center=true);
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// ribbon slot on the up-slope edge
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translate([0, P_h/2, -30-lip_t]) cube([fpc_w, 12, 60], center=true);
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}
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}
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module port_cuts() {
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// USB-C x2 + microSD through the back wall (y = D)
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for (i=[0:2]) {
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pw = (i==2) ? sd_w : usbc_w;
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ph = (i==2) ? sd_h : usbc_h;
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translate([port_x[i], D-wall-1, port_z])
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rotate([-90,0,0]) linear_extrude(wall+2)
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offset(r=0.8) square([pw-1.6, ph-1.6], center=true);
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}
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}
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// engraved nameplate on the DECK, in the band between the front edge and the
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// screen — faces the user as they write. Sits flat on the reclined deck.
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module nameplate() {
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name_y = (screen_cy - P_h/2) / 2; // centre of the front deck band
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on_deck() translate([screen_off, name_y, -name_depth])
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linear_extrude(name_depth + 0.6)
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text(name_text, size=name_size, halign="center", valign="center",
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font=name_font, spacing=1.1);
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}
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module case_body() {
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difference() {
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union() {
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difference() { body_outer(); body_cavity(); }
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corner_posts();
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bracket_bosses();
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}
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screen_cuts();
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port_cuts();
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nameplate(); // engrave (comment out for a blank face)
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}
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}
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// ===========================================================================
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// screen retaining bracket (printed flat, screwed to the 4 bosses)
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// ===========================================================================
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module bracket() {
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ow = P_w + 18; oh = P_h + 18;
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difference() {
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linear_extrude(bracket_t)
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difference() { rrect(ow, oh, 4); rrect(A_ap_w+2, A_ap_h+2, 2); }
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for (bx=[-(P_w/2+5), P_w/2+5], by=[-(P_h/2+5), P_h/2+5])
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translate([bx, by, -1]) cylinder(h=bracket_t+2, r=1.45); // M2 clear
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}
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}
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// ===========================================================================
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// baseplate / chassis
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// ===========================================================================
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module baseplate() {
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iw = W - 2*wall - bp_gap;
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id = D - 2*wall - bp_gap;
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difference() {
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union() {
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// plate (centred on the footprint)
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translate([W/2, D/2, 0]) linear_extrude(bp_t) rrect(iw, id, corner_r-wall);
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// round feet underneath
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for (fx=[corner_r+6, W-corner_r-6], fy=[corner_r+6, D-corner_r-6])
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translate([fx, fy, -foot_h]) cylinder(h=foot_h+0.1, r=foot_r);
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// board standoffs on top
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for (h = concat(esp_holes, brk_holes))
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translate([h[0], h[1], bp_t]) cylinder(h=standoff_h, r=3);
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}
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// corner screw clearance (into the body posts)
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for (px=[corner_r+3, W-corner_r-3], py=[corner_r+3, D-corner_r-3])
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translate([px, py, -foot_h-1]) cylinder(h=bp_t+foot_h+2, r=1.6);
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// standoff pilot holes
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for (h = concat(esp_holes, brk_holes))
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translate([h[0], h[1], bp_t-1]) cylinder(h=standoff_h+2, r=standoff_pilot);
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// cable / connector relief at the back
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translate([W/2, D-wall-3, -1]) cube([30, 8, bp_t+2], center=false);
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}
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}
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// ===========================================================================
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// assemblies
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// ===========================================================================
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module ghost_screen() {
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on_deck() translate([screen_off, screen_cy+screen_off, -lip_t-G_t/2])
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color(C_screen) cube([G_w, G_h, G_t], center=true);
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}
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module placed_bracket() {
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on_deck() translate([screen_off, screen_cy+screen_off,
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-lip_t-G_t-foam_t-bracket_t])
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color(C_bracket) bracket();
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}
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if (show == "assembled") {
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color(C_body) case_body();
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ghost_screen();
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placed_bracket();
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translate([0,0,-0.01]) color(C_plate) baseplate();
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} else if (show == "body") {
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color(C_body) case_body();
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} else if (show == "bracket") {
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color(C_bracket) bracket();
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} else if (show == "baseplate") {
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color(C_plate) baseplate();
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} else if (show == "print_plate") {
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color(C_body) case_body();
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translate([W+30, 0, 0]) color(C_plate) baseplate();
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translate([W+30, D+30, foot_h]) color(C_bracket) bracket();
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}
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