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update some deisng parameters and add new cases

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gravatite
2026-07-29 14:32:22 -07:00
parent 683697604a
commit 45a77885f9
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cases/attitude-imu/source/feather_case.scad
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/*
* Parametric enclosure for the Adafruit ESP32 Feather V2 and FeatherWings.
*
* Coordinate system:
* X: USB-C wall (0) toward the rear of the case
* Y: non-battery side (0) toward the battery/JST side
* Z: outside bottom (0) upward
*
* Board coordinates are derived from Adafruit's Eagle PCB files:
* https://github.com/adafruit/Adafruit-ESP32-Feather-V2-PCB
* https://github.com/adafruit/Adafruit-OLED-FeatherWing-PCB
*/
/* [Output] */
part = "assembly"; // [assembly,body,lid,buttons,insert_coupon,switch_coupon,fit_coupon]
exploded_view = 8; // [0:1:20]
show_references = true;
/* [Stack] */
top_profile = "generic"; // [generic,gps,oled128x64]
wing_count = 1; // [1:1:8]
wing_pitch = 12.25; // [7:0.1:16]
stack_height_override = 0; // [0:0.1:100]
generic_component_height = 3; // [0:0.1:30]
generic_top_gap = 2; // [0.5:0.1:10]
gps_antenna_height = 6;
gps_top_gap = 5;
oled_component_height = 2.4;
oled_display_height = 1.5;
oled_face_gap = 0.8;
/* [OLED controls] */
button_a = true;
button_b = true;
button_c = true;
button_reset = false;
button_projection = 1.5; // [0.5:0.1:3]
button_cap_size = [5, 3.2];
button_flange_size = [6.6, 3.6];
button_flange_thickness = 0.9;
button_travel = 0.5;
button_contact_extension = 0.7;
/* [Battery and switch] */
battery_enabled = false;
battery_length = 69;
battery_diameter = 18;
battery_radial_clearance = 0.6;
battery_end_clearance = 1;
switch_hole_diameter = 12;
switch_hole_compensation = 0.3;
switch_cap_diameter = 8;
switch_flange_diameter = 16.2;
switch_body_length = 24;
switch_body_diameter = 12;
switch_wire_allowance = 3;
/* [Tripod mount] */
tripod_insert_enabled = false;
tripod_insert_length = 6.4;
tripod_insert_hole_diameter = 8.8;
tripod_thread_clearance_diameter = 6.8;
tripod_boss_diameter = 14;
/* [M2.5 inserts] */
m25_insert_length = 4;
m25_insert_hole_diameter = 3.7;
m25_screw_clearance = 2.8;
m25_boss_diameter = 7;
insert_entry_chamfer = 0.6;
insert_melt_relief = 0.8;
/* [Shell and fit] */
wall_thickness = 2.4;
floor_thickness = 2.4;
lid_thickness = 3.2;
corner_radius = 4;
board_bottom_clearance = 5.4;
board_side_clearance = 7;
board_rear_clearance = 4;
usb_board_wall_gap = 1.2;
lid_lip_depth = 2.4;
lid_lip_thickness = 1.2;
fit_clearance = 0.35;
hole_compensation = 0.2;
lid_screw_head_diameter = 5.2;
lid_screw_head_height = 2.5;
/* [USB-C opening] */
usb_opening_width = 12.5;
usb_opening_height = 7;
usb_opening_radius = 1.5;
usb_vertical_offset = 0;
/* [Custom wall cutouts] */
// Entry format: [face, shape, u, z, width, height, radius]
// face: front, rear, left, right. u is Y on front/rear and X on left/right.
// shape: circle, rect, roundrect, slot. Circle uses width as its diameter.
extra_cutouts = [];
/* [Calibration] */
coupon_steps = [-0.3, -0.15, 0, 0.15, 0.3];
$fn = $preview ? 36 : 72;
eps = 0.02;
// Adafruit Feather mechanical reference, millimetres.
feather_length = 50.8;
feather_width = 22.86;
board_thickness = 1.6;
mount_x = [2.54, 48.26];
mount_y = [2.54, 20.32];
usb_center_y = 11.43;
// Official 128x64 OLED FeatherWing geometry in Feather-board coordinates.
oled_visible_min = [11.42, 3.78];
oled_visible_size = [30, 15.3];
oled_button_a_xy = [4.318, 15.875];
oled_button_b_xy = [4.318, 11.43];
oled_button_c_xy = [4.318, 6.985];
oled_button_reset_xy = [7.366, 20.828];
effective_floor = tripod_insert_enabled
? max(floor_thickness, tripod_insert_length + insert_melt_relief + 1.2)
: floor_thickness;
effective_board_clearance = max(
board_bottom_clearance,
m25_insert_length + insert_melt_relief + 0.6
);
board_origin_x = wall_thickness + usb_board_wall_gap;
board_origin_y = wall_thickness + board_side_clearance;
board_bottom_z = effective_floor + effective_board_clearance;
board_top_z = board_bottom_z + board_thickness;
computed_top_pcb_z = board_top_z + wing_count * wing_pitch;
top_pcb_z = stack_height_override > 0
? board_top_z + stack_height_override
: computed_top_pcb_z;
profile_component_height =
top_profile == "gps" ? gps_antenna_height :
top_profile == "oled128x64" ? oled_component_height :
generic_component_height;
profile_top_gap =
top_profile == "gps" ? gps_top_gap :
top_profile == "oled128x64" ? oled_face_gap :
generic_top_gap;
partition_y = board_origin_y + feather_width + 1;
battery_center_y = partition_y + wall_thickness + battery_radial_clearance
+ battery_diameter / 2;
battery_start_x = board_origin_x + battery_end_clearance;
battery_end_x = battery_start_x + battery_length;
switch_center_x = battery_end_x + max(
switch_body_diameter / 2 + 0.8,
switch_flange_diameter / 2 + 0.5
);
case_length_plain = board_origin_x + feather_length
+ board_rear_clearance + wall_thickness;
case_length_battery = switch_center_x + switch_flange_diameter / 2
+ 1.2 + wall_thickness;
case_length = battery_enabled ? max(case_length_plain, case_length_battery)
: case_length_plain;
case_width_plain = board_origin_y + feather_width
+ board_side_clearance + wall_thickness;
case_width_battery = battery_center_y + battery_diameter / 2
+ battery_radial_clearance + wall_thickness;
case_width = battery_enabled ? max(case_width_plain, case_width_battery)
: case_width_plain;
battery_center_z = effective_floor + battery_radial_clearance
+ battery_diameter / 2;
switch_center_z = max(
effective_floor + switch_flange_diameter / 2 + 1,
battery_center_z
);
electronics_ceiling_z = top_pcb_z + profile_component_height + profile_top_gap;
battery_ceiling_z = battery_enabled
? max(
battery_center_z + battery_diameter / 2 + battery_radial_clearance,
switch_center_z + switch_flange_diameter / 2 + 1
)
: 0;
body_height = max(electronics_ceiling_z, battery_ceiling_z);
lid_boss_r = m25_boss_diameter / 2;
lid_boss_wall_overlap = 0.6;
lid_boss_xy = [
[
wall_thickness + lid_boss_r - lid_boss_wall_overlap,
wall_thickness + lid_boss_r - lid_boss_wall_overlap
],
[
case_length - wall_thickness - lid_boss_r + lid_boss_wall_overlap,
wall_thickness + lid_boss_r - lid_boss_wall_overlap
],
[
wall_thickness + lid_boss_r - lid_boss_wall_overlap,
case_width - wall_thickness - lid_boss_r + lid_boss_wall_overlap
],
[
case_length - wall_thickness - lid_boss_r + lid_boss_wall_overlap,
case_width - wall_thickness - lid_boss_r + lid_boss_wall_overlap
]
];
assert(wing_count >= 1, "wing_count must be at least one");
assert(top_profile == "generic" || top_profile == "gps"
|| top_profile == "oled128x64", "Unsupported top_profile");
assert(wall_thickness >= 1.2, "wall_thickness is too small for 0.6 mm FDM");
assert(lid_lip_thickness >= 1.2, "lid lip needs at least two 0.6 mm lines");
assert(m25_boss_diameter > m25_insert_hole_diameter + 2,
"M2.5 boss does not have enough radial material");
assert(!tripod_insert_enabled
|| tripod_boss_diameter > tripod_insert_hole_diameter + 3,
"Tripod insert boss does not have enough radial material");
function clamp(v, lo, hi) = min(max(v, lo), hi);
module rounded_rect_2d(size, radius) {
r = clamp(radius, 0.01, min(size[0], size[1]) / 2 - 0.01);
hull() {
for (x = [r, size[0] - r], y = [r, size[1] - r])
translate([x, y]) circle(r = r);
}
}
module centered_rounded_rect_2d(size, radius) {
translate([-size[0] / 2, -size[1] / 2])
rounded_rect_2d(size, radius);
}
module centered_rounded_prism(size, height, radius) {
linear_extrude(height = height)
centered_rounded_rect_2d(size, radius);
}
module rounded_box(size, radius) {
linear_extrude(height = size[2])
rounded_rect_2d([size[0], size[1]], radius);
}
module insert_pocket(diameter, depth, entry_z, downward = true) {
bore_d = diameter + hole_compensation;
if (downward) {
translate([0, 0, entry_z - depth])
cylinder(h = depth + eps, d = bore_d);
translate([0, 0, entry_z - insert_entry_chamfer])
cylinder(
h = insert_entry_chamfer + eps,
d1 = bore_d,
d2 = bore_d + 2 * insert_entry_chamfer
);
} else {
translate([0, 0, entry_z - eps])
cylinder(h = depth + eps, d = bore_d);
translate([0, 0, entry_z - eps])
cylinder(
h = insert_entry_chamfer + eps,
d1 = bore_d + 2 * insert_entry_chamfer,
d2 = bore_d
);
}
}
module face_rounded_cutout(face, u, z, width, height, radius) {
r = clamp(radius, 0.01, min(width, height) / 2);
depth = wall_thickness + 2 * eps;
if (face == "front" || face == "rear") {
x0 = face == "front" ? -eps : case_length - wall_thickness - eps;
hull()
for (yy = [u - width / 2 + r, u + width / 2 - r],
zz = [z - height / 2 + r, z + height / 2 - r])
translate([x0, yy, zz])
rotate([0, 90, 0]) cylinder(h = depth, r = r);
} else if (face == "left" || face == "right") {
y0 = face == "left" ? -eps : case_width - wall_thickness - eps;
hull()
for (xx = [u - width / 2 + r, u + width / 2 - r],
zz = [z - height / 2 + r, z + height / 2 - r])
translate([xx, y0, zz])
rotate([-90, 0, 0]) cylinder(h = depth, r = r);
}
}
module face_circle_cutout(face, u, z, diameter) {
depth = wall_thickness + 2 * eps;
if (face == "front")
translate([-eps, u, z])
rotate([0, 90, 0]) cylinder(h = depth, d = diameter);
else if (face == "rear")
translate([case_length - wall_thickness - eps, u, z])
rotate([0, 90, 0]) cylinder(h = depth, d = diameter);
else if (face == "left")
translate([u, -eps, z])
rotate([-90, 0, 0]) cylinder(h = depth, d = diameter);
else if (face == "right")
translate([u, case_width - wall_thickness - eps, z])
rotate([-90, 0, 0]) cylinder(h = depth, d = diameter);
}
module custom_wall_cutout(entry) {
face = entry[0];
shape = entry[1];
u = entry[2];
z = entry[3];
width = entry[4];
height = len(entry) > 5 ? entry[5] : width;
radius = len(entry) > 6 ? entry[6] : min(width, height) / 2;
assert(face == "front" || face == "rear"
|| face == "left" || face == "right", "Invalid cutout face");
assert(shape == "circle" || shape == "rect"
|| shape == "roundrect" || shape == "slot", "Invalid cutout shape");
assert(z - height / 2 >= effective_floor,
"Cutout intersects the floor");
assert(z + height / 2 <= body_height - lid_lip_depth,
"Cutout intersects the lid locating lip");
assert(
(face == "front" || face == "rear")
? u - width / 2 >= 0 && u + width / 2 <= case_width
: u - width / 2 >= 0 && u + width / 2 <= case_length,
"Cutout extends beyond its wall"
);
if (shape == "circle")
face_circle_cutout(face, u, z, width);
else
face_rounded_cutout(
face, u, z, width, height,
shape == "rect" ? 0.02 :
shape == "slot" ? min(width, height) / 2 : radius
);
}
module board_standoffs() {
for (mx = mount_x, my = mount_y)
translate([
board_origin_x + mx,
board_origin_y + my,
effective_floor - eps
])
cylinder(
h = effective_board_clearance + eps,
d = m25_boss_diameter
);
}
module lid_bosses() {
for (p = lid_boss_xy)
translate([p[0], p[1], effective_floor - eps])
cylinder(
h = body_height - effective_floor + eps,
d = m25_boss_diameter
);
}
module battery_cradle() {
partition_height = min(
body_height - lid_lip_depth - 0.5,
battery_center_z + battery_diameter / 2 + 1.5
);
rib_width = 2.4;
rib_positions = [
battery_start_x + 4,
(battery_start_x + battery_end_x) / 2,
battery_end_x - 4
];
// Board/battery partition, with a lead-routing notch near the JST end.
difference() {
translate([wall_thickness, partition_y, effective_floor - eps])
cube([
battery_end_x - wall_thickness + battery_end_clearance,
wall_thickness,
partition_height - effective_floor + eps
]);
translate([
board_origin_x + 6.5,
partition_y - eps,
effective_floor + 1.5
])
cube([9, wall_thickness + 2 * eps, 6]);
}
// Three low curved ribs cradle the protected cylindrical pack.
for (x = rib_positions)
difference() {
translate([
x - rib_width / 2,
battery_center_y - battery_diameter / 2
- battery_radial_clearance,
effective_floor - eps
])
cube([
rib_width,
battery_diameter + 2 * battery_radial_clearance,
battery_diameter / 2 + battery_radial_clearance + eps
]);
translate([x - rib_width, battery_center_y, battery_center_z])
rotate([0, 90, 0])
cylinder(
h = rib_width * 2,
d = battery_diameter + 2 * battery_radial_clearance
);
}
// End stops remain below the cell center so the lid can remove vertically.
for (x = [
battery_start_x - battery_end_clearance - wall_thickness,
battery_end_x + battery_end_clearance
])
translate([
x,
battery_center_y - battery_diameter / 2 - battery_radial_clearance,
effective_floor - eps
])
cube([
wall_thickness,
battery_diameter + 2 * battery_radial_clearance,
battery_diameter / 2 + 1 + eps
]);
// Rear cross-strip separates the side-mounted switch body from the cell.
translate([
battery_end_x + battery_end_clearance,
partition_y,
effective_floor - eps
])
cube([
case_length - wall_thickness - battery_end_x - battery_end_clearance,
case_width - wall_thickness - partition_y,
min(body_height - effective_floor, switch_center_z
+ switch_body_diameter / 2 + switch_wire_allowance
- effective_floor) + eps
]);
}
module body_positive() {
union() {
difference() {
rounded_box([case_length, case_width, body_height], corner_radius);
translate([wall_thickness, wall_thickness, effective_floor])
rounded_box([
case_length - 2 * wall_thickness,
case_width - 2 * wall_thickness,
body_height - effective_floor + eps
], max(0.6, corner_radius - wall_thickness));
}
board_standoffs();
lid_bosses();
if (battery_enabled)
battery_cradle();
if (tripod_insert_enabled)
translate([case_length / 2, case_width / 2, 0])
cylinder(h = effective_floor, d = tripod_boss_diameter);
}
}
module body_cutouts() {
// Board mounting insert pockets, loaded from above before the Feather.
for (mx = mount_x, my = mount_y)
translate([board_origin_x + mx, board_origin_y + my, 0])
insert_pocket(
m25_insert_hole_diameter,
m25_insert_length + insert_melt_relief,
board_bottom_z
);
// Lid insert pockets, loaded from the top of the body.
for (p = lid_boss_xy)
translate([p[0], p[1], 0])
insert_pocket(
m25_insert_hole_diameter,
m25_insert_length + insert_melt_relief,
body_height
);
// USB-C cable opening. Connector center is from the official ESP32 V2 PCB.
usb_center_z = board_top_z + 1.6 + usb_vertical_offset;
face_rounded_cutout(
"front",
board_origin_y + usb_center_y,
usb_center_z,
usb_opening_width + hole_compensation,
usb_opening_height + hole_compensation,
usb_opening_radius
);
if (battery_enabled) {
face_circle_cutout(
"right",
switch_center_x,
switch_center_z,
switch_hole_diameter + switch_hole_compensation
);
// Clear the switch body and its prewired terminals through the rear bay.
translate([
switch_center_x,
case_width - wall_thickness + eps,
switch_center_z
])
rotate([90, 0, 0])
cylinder(
h = switch_body_length + switch_wire_allowance
+ wall_thickness + eps,
d = switch_body_diameter + 2 * fit_clearance
);
}
if (tripod_insert_enabled) {
translate([case_length / 2, case_width / 2, 0]) {
translate([0, 0, -eps])
cylinder(
h = effective_floor + 2 * eps,
d = tripod_thread_clearance_diameter + hole_compensation
);
insert_pocket(
tripod_insert_hole_diameter,
tripod_insert_length + insert_melt_relief,
effective_floor
);
}
}
for (entry = extra_cutouts)
custom_wall_cutout(entry);
}
module body() {
difference() {
body_positive();
body_cutouts();
}
}
module lid_plate_positive() {
union() {
rounded_box([case_length, case_width, lid_thickness], corner_radius);
// Inset rim: exported pointing upward so the outer lid face prints flat.
translate([
wall_thickness + fit_clearance,
wall_thickness + fit_clearance,
lid_thickness
])
linear_extrude(height = lid_lip_depth)
difference() {
rounded_rect_2d([
case_length - 2 * (wall_thickness + fit_clearance),
case_width - 2 * (wall_thickness + fit_clearance)
], max(0.6, corner_radius - wall_thickness));
translate([lid_lip_thickness, lid_lip_thickness])
rounded_rect_2d([
case_length - 2 * (
wall_thickness + fit_clearance
+ lid_lip_thickness
),
case_width - 2 * (
wall_thickness + fit_clearance
+ lid_lip_thickness
)
], max(0.5, corner_radius - wall_thickness
- lid_lip_thickness));
}
}
}
module beveled_oled_window() {
inner_size = oled_visible_size;
outer_size = [oled_visible_size[0] + 3, oled_visible_size[1] + 3];
center = [
board_origin_x + oled_visible_min[0] + oled_visible_size[0] / 2,
board_origin_y + oled_visible_min[1] + oled_visible_size[1] / 2
];
hull() {
translate([center[0], center[1], -eps])
linear_extrude(height = eps)
centered_rounded_rect_2d(outer_size, 1.5);
translate([center[0], center[1], lid_thickness - eps])
linear_extrude(height = 2 * eps)
centered_rounded_rect_2d(inner_size, 0.8);
}
}
module oled_button_lid_cutout(xy) {
center = [board_origin_x + xy[0], board_origin_y + xy[1]];
shaft_size = [
button_cap_size[0] + fit_clearance * 2,
button_cap_size[1] + fit_clearance * 2
];
recess_size = [
button_flange_size[0] + fit_clearance * 2,
button_flange_size[1] + fit_clearance * 2
];
recess_depth = button_flange_thickness + button_travel;
translate([center[0], center[1], -eps])
centered_rounded_prism(
shaft_size,
lid_thickness + 2 * eps,
shaft_size[1] / 2
);
translate([center[0], center[1], lid_thickness - recess_depth])
centered_rounded_prism(
recess_size,
recess_depth + lid_lip_depth + eps,
recess_size[1] / 2
);
}
module lid_cutouts() {
// Through holes plus shallow counterbores for flush M2.5 socket heads.
for (p = lid_boss_xy) {
translate([p[0], p[1], -eps])
cylinder(
h = lid_thickness + lid_lip_depth + 2 * eps,
d = m25_screw_clearance + hole_compensation
);
translate([p[0], p[1], -eps])
cylinder(
h = lid_screw_head_height + eps,
d = lid_screw_head_diameter + hole_compensation
);
}
if (top_profile == "oled128x64") {
beveled_oled_window();
if (button_a) oled_button_lid_cutout(oled_button_a_xy);
if (button_b) oled_button_lid_cutout(oled_button_b_xy);
if (button_c) oled_button_lid_cutout(oled_button_c_xy);
if (button_reset) oled_button_lid_cutout(oled_button_reset_xy);
}
}
module lid() {
difference() {
lid_plate_positive();
lid_cutouts();
}
}
module one_oled_button() {
recess_depth = button_flange_thickness + button_travel;
stem_height = lid_thickness - recess_depth + button_projection;
// Print outer cap face down. The flange and contact nub build upward.
centered_rounded_prism(
button_cap_size,
stem_height,
button_cap_size[1] / 2
);
translate([0, 0, stem_height])
centered_rounded_prism(
button_flange_size,
button_flange_thickness,
button_flange_size[1] / 2
);
translate([0, 0, stem_height + button_flange_thickness])
cylinder(h = button_contact_extension, d = 3);
}
module buttons() {
enabled = [
button_a,
button_b,
button_c,
button_reset
];
count_enabled = len([for (v = enabled) if (v) 1]);
if (count_enabled == 0)
echo("No OLED buttons are enabled.");
for (i = [0 : len(enabled) - 1])
if (enabled[i])
translate([i * (button_flange_size[0] + 3), 0, 0])
one_oled_button();
}
module reference_board() {
color([0.05, 0.25, 0.55, 0.75])
translate([board_origin_x, board_origin_y, board_bottom_z])
rounded_box([feather_length, feather_width, board_thickness], 2.54);
color([0.12, 0.45, 0.75, 0.45])
for (i = [1 : wing_count])
translate([
board_origin_x,
board_origin_y,
board_top_z + i * wing_pitch - board_thickness
])
rounded_box(
[feather_length, feather_width, board_thickness], 2.54
);
}
module reference_top_feature() {
if (top_profile == "gps")
color([0.92, 0.78, 0.35, 0.8])
translate([
board_origin_x + 31,
board_origin_y + (feather_width - 15) / 2,
top_pcb_z
])
cube([15, 15, gps_antenna_height]);
else if (top_profile == "oled128x64") {
color([0.12, 0.12, 0.12, 0.9])
translate([
board_origin_x + oled_visible_min[0],
board_origin_y + oled_visible_min[1],
top_pcb_z
])
cube([
oled_visible_size[0],
oled_visible_size[1],
oled_display_height
]);
color([0.6, 0.6, 0.6, 0.9])
for (xy = [
oled_button_a_xy,
oled_button_b_xy,
oled_button_c_xy,
oled_button_reset_xy
])
translate([
board_origin_x + xy[0],
board_origin_y + xy[1],
top_pcb_z
])
cylinder(h = 1.6, d = 2.1);
} else
color([0.3, 0.65, 0.35, 0.6])
translate([
board_origin_x + 10,
board_origin_y + 4,
top_pcb_z
])
cube([
feather_length - 20,
feather_width - 8,
generic_component_height
]);
}
module reference_battery_and_switch() {
if (battery_enabled) {
color([0.35, 0.18, 0.55, 0.75])
translate([battery_start_x, battery_center_y, battery_center_z])
rotate([0, 90, 0])
cylinder(h = battery_length, d = battery_diameter);
color([0.8, 0.15, 0.1, 0.65])
translate([
switch_center_x,
case_width - wall_thickness,
switch_center_z
])
rotate([90, 0, 0]) {
cylinder(h = switch_body_length, d = switch_body_diameter);
translate([0, 0, -1.5])
cylinder(h = 1.5, d = switch_flange_diameter);
translate([0, 0, -3])
cylinder(h = 3, d = switch_cap_diameter);
}
}
}
module assembly() {
color([0.82, 0.84, 0.88, 1]) body();
if ($preview && show_references) {
reference_board();
reference_top_feature();
reference_battery_and_switch();
}
// Printable lid is mirrored into its installed orientation and exploded up.
color([0.92, 0.92, 0.95, 0.88])
translate([0, case_width, body_height + lid_thickness + exploded_view])
rotate([180, 0, 0])
lid();
}
module coupon_hole(x, y, diameter, depth) {
translate([x, y, -eps]) cylinder(h = depth + 2 * eps, d = diameter);
}
module insert_coupon() {
spacing = 15;
coupon_length = spacing * len(coupon_steps) + 8;
coupon_width = 32;
coupon_height = max(
m25_insert_length + insert_melt_relief + 1.2,
tripod_insert_length + insert_melt_relief + 1.2
);
difference() {
rounded_box([coupon_length, coupon_width, coupon_height], 3);
for (i = [0 : len(coupon_steps) - 1]) {
x = 7 + i * spacing;
coupon_hole(
x, 8,
m25_insert_hole_diameter + coupon_steps[i],
m25_insert_length + insert_melt_relief
);
coupon_hole(
x, 23,
tripod_insert_hole_diameter + coupon_steps[i],
tripod_insert_length + insert_melt_relief
);
}
}
}
module switch_coupon() {
spacing = 18;
coupon_length = spacing * len(coupon_steps) + 6;
coupon_width = 24;
coupon_height = wall_thickness;
difference() {
rounded_box([coupon_length, coupon_width, coupon_height], 3);
for (i = [0 : len(coupon_steps) - 1])
translate([6 + i * spacing, coupon_width / 2, -eps])
cylinder(
h = coupon_height + 2 * eps,
d = switch_hole_diameter + coupon_steps[i]
);
}
}
module fit_coupon() {
segment_length = 34;
base_width = 16;
base_height = 6;
cavity_size = [segment_length - 8, base_width - 8];
male_size = [
cavity_size[0] - 2 * fit_clearance,
cavity_size[1] - 2 * fit_clearance
];
difference() {
rounded_box([segment_length, base_width, base_height], 2);
translate([4, 4, 2])
cube([segment_length - 8, base_width - 8, base_height]);
}
translate([segment_length + 5, 0, 0])
union() {
cube([segment_length, base_width, lid_thickness]);
translate([
4 + fit_clearance,
4 + fit_clearance,
lid_thickness - eps
])
linear_extrude(height = lid_lip_depth + eps)
difference() {
rounded_rect_2d(male_size, 1);
translate([lid_lip_thickness, lid_lip_thickness])
rounded_rect_2d([
male_size[0] - 2 * lid_lip_thickness,
male_size[1] - 2 * lid_lip_thickness
], 0.5);
}
}
}
if (part == "assembly")
assembly();
else if (part == "body")
body();
else if (part == "lid")
lid();
else if (part == "buttons")
buttons();
else if (part == "insert_coupon")
insert_coupon();
else if (part == "switch_coupon")
switch_coupon();
else if (part == "fit_coupon")
fit_coupon();
else
assert(false, str("Unknown part: ", part));