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crkbd-case-minimal.scad
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crkbd-case-minimal.scad
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///////////////////////////////////////////////////
// Minimal Tilted Corne Keyboard case (alternate layout)
//
// * Simple top plate (no sides)
// * Simple angled bottom plate (no sides)
// * Supports bottom mount MCU e.g. nrfmicro/lipo combo
//
///////////////////////////////////////////////////
include <../keyboard-case.scad>
include <crkbd-common.scad>
theme = 3;
nrfmicro = false; // If true, make adjustments for nrfmicro and small lipo battery, rather than pro micro.
top_mount_mcu = false;
top_mount_reset = false;
wall_thickness = 2.5;
plate_thickness = 4; // (5mm - max diode height)
bottom_case_height = 0;
window_z = top_mount_mcu ? 13 : 6;
mcu_size = [20.0, 35, 13.2]; // Adjusted depth according to sockets etc
battery_bay = 0; // 0 for one, else the index of one of the entries below for various size batteries
battery_bays = [
/* Hole size, Offset */
[], /* Dummy entry */
[[66.5, 15, 9], [-8, -mcu_size.y+0.5, 0]], /* (551148 helicopter batteries, 55mm x 11mm x 4.8mm, 200mAh) */
[[56, 33, 9], [-mcu_size.x+4.5, -mcu_size.y/2-1.4, 0]] /* (403048 lipo, 40mm x 30mm x 4.8mm, 600mAh) */
];
battery_bay_size = battery_bays[battery_bay][0];
battery_bay_offset = battery_bays[battery_bay][1];
screw_rad = 2.2 / 2;
screw_head_rad = 5.4 / 2;
//screw_head_depth = 1.5;
screw_head_depth = 0;
//standoff_rad = 4.0 / 2;
bottom_screws = true; // Default is to screw down from the top
tent_angle = 10;
hipro_height = 9.5; // 0 for minimal, ~9.5 for flush, ~15 for hipro
micro_usb_hole_width = 14;
micro_usb_hole_height = 8;
cherry_clip_recess_height = 2.0; // How far down clip recess go, just go for the minimal
keycap_depth_offset = 6.6; // Distance from bottom of keycap to top of plate.
$fa = 1;
$fs = $preview ? 8 : 2;
module crkbd_top_case() {
top_plate(left_keys, crkbd_screw_holes) crkbd_left_top();
}
module crkbd_bottom_case() {
outer_height = 1.25;
standoff = 2.2;
gap_offset = hipro_height == 0 ? 0 : 0.4;
outer_offset = hipro_height == 0 ? 0 : 2.5 + gap_offset;
outer_width = crkbd_pcb.x + 2 * outer_offset;
min_inner_height = top_mount_mcu
? (battery_bay_size.z + wall_thickness)
: battery_bay ? (battery_bay_size.z + wall_thickness)
: outer_height;
min_angle = atan((min_inner_height - outer_height) / outer_width);
if (tent_angle < min_angle) {
echo(str("WARNING: min_angle=", min_angle, " tent_angle=", tent_angle, " inner_height=", inner_height));
}
inner_height = tan(tent_angle) * outer_width + outer_height;
c = crkbd_first_offset + [0, 30, -inner_height + outer_height];
rotate([0, tent_angle, 0]) translate([-c.x, -c.y, 0]) rotate([0, -tent_angle, 0]) translate([c.x, c.y, 0])
difference() {
translate([-c.x, -c.y, 0])
difference() {
translate(c) difference() {
chamfer_extrude(height = inner_height + hipro_height, convexity = 3, faces = hipro_height == 0 ? "none" : "top")
offset(r=outer_offset) crkbd_left_bottom();
if (hipro_height > 0) {
translate([0, 0, inner_height])
linear_extrude(height = hipro_height + 0.01, convexity = 3)
offset(r = gap_offset) crkbd_left_bottom();
}
}
rotate([0, tent_angle, 0])
translate([-outer_offset-0.1, -100, -inner_height])
cube([crkbd_pcb.x * 2, 200, inner_height]);
}
translate([0, 0, 0]) {
if (battery_bay) {
// Hole for lipo battery
translate(-crkbd_first_offset)
translate([crkbd_pcb.x - battery_bay_size.x, -battery_bay_size.y, -battery_bay_size.z + outer_height + 0.01])
translate(battery_bay_offset) {
roundedcube(battery_bay_size, r = 1, center = false);
}
}
if (!top_mount_mcu) {
// Hole for mcu
translate(-crkbd_first_offset)
translate([crkbd_pcb.x - mcu_size.x + 0.01, -mcu_size.y, -mcu_size.z+outer_height+standoff]) {
cube(mcu_size, center = false);
if (hipro_height > 0) {
translate([2.5, 0, 0]) cube(mcu_size + [-5, 10, 0], center = false);
}
}
}
if (!top_mount_reset) {
// Hole for reset access, extend through bottom for hipro version
reset_cutout = reset_size + [2, 2, hipro_height == 0 ? 5 : 50];
translate(-crkbd_first_offset)
translate([crkbd_pcb.x - reset_cutout.x + 0.01, reset_y_off-reset_cutout.y/2, -reset_cutout.z+outer_height+standoff]) {
cube(reset_cutout, center = false);
}
}
}
screw_positions(crkbd_screw_holes) {
screw_head_depth = 80;
translate([0, 0, -0.1-screw_head_depth-1]) bolthole(r1=screw_head_rad, r2=screw_rad, h1=screw_head_depth, h2=screw_length, membrane = screw_head_depth > 0 ? 0.2 : 0);
}
}
}
part = "assembly";
explode = 0;
cross_section = false;
depressed = false;
if (part == "outer") { // To preview the outer profile, key hole, and screw hole positions
/* offset(r = -2.5) // Where top of camber would come to */
color("gray") translate([0, 0, -7.1]) crkbd_expand_profile(2) crkbd_left_bottom_mod();
color("blue") translate([0, 0, -5.1]) crkbd_left_bottom_mod();
translate([0, 0, -5]) crkbd_left_top();
//translate([0, 0, -5]) crkbd_left_top_window();
color("black") for (pos = crkbd_screw_holes) {
translate(pos) {
circle(r = 2.5 / 2, $fn=20);
//polyhole2d(r = 2.5 / 2);
}
}
#key_holes(left_keys, "plate");
} else if (part == "top") {
translate(crkbd_center_offset)
render() crkbd_top_case();
//%translate([0, 0, plate_thickness + -7 * explode]) key_holes(left_keys, "keycap");
} else if (part == "bottom") {
rotate([0, $preview ? 0 : -tent_angle, 0])
translate(crkbd_center_offset)
crkbd_bottom_case();
} else if (part == "assembly") difference(convexity=10) {
union() {
//rotate([0, -tent_angle, 0])
translate([-80, 60, plate_thickness]) {
%translate([0, 0, plate_thickness - (depressed ? 4 : 0) + 30 * explode]) key_holes(left_keys, "keycap");
%translate([0, 0, plate_thickness + 20 * explode]) key_holes(left_keys, "switch");
crkbd_top_case();
%translate([0, 0, -2.5 - 5 * explode]) crkbd_pcb_assembly(top_mount_mcu = top_mount_mcu, top_mount_reset = top_mount_reset, window_z = window_z);
}
translate([-80, 60, 0])
translate([0, 0, -bottom_case_height - 1 - (20 * explode)]) crkbd_bottom_case();
}
if (cross_section) {
translate([50, -250, -250]) cube([400, 500, 500], center = false);
}
}
// Requires my utility functions in your OpenSCAD lib or as local submodule
// https://github.com/Lenbok/scad-lenbok-utils.git
use<../Lenbok_Utils/utils.scad>