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keycap_stem.scad
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revision = "e";
text_font = "Noto:style=Bold";
text_size = 3;
text_height = 0.3;
surface_offset = 0.001;
stem_x = 15.5;
stem_y = 15.475;
stem_height = 5.65;
stem_top_bottom_ratio = 0.85;
inside_x = 13.3;
inside_y = 13.3;
inside_hight = 3;
mx_cylinder = 5.5;
mx_cross = 4.35;
mx_cross_width = 1.4;
mx_cross_fillet = 0.3;
disp_x = 12.2;
disp_y = 12.1;
disp_height = 1.1;
disp_y_center_offset = 1.345;
cable_stem_x = 9.0;
cable_stem_y = 2.12;
cable_thickness = 0.5;
module sector(radius, angles, fn = 24)
{
r = radius / cos(180 / fn);
step = -360 / fn;
points = concat([[ 0, 0 ]], [for (a = [angles[0]:step:angles[1] - 360])[r * cos(a), r * sin(a)]],
[[r * cos(angles[1]), r * sin(angles[1])]]);
difference()
{
circle(radius, $fn = fn);
polygon(points);
}
}
module arc(radius, angles, width = 1, fn = 50)
{
difference()
{
sector(radius + width, angles, fn);
sector(radius, angles, fn);
}
}
module display()
{
color([ 0.1, 0.1, 0.1, 0.95 ])
translate([ 0, disp_y_center_offset - 0.4, stem_height - disp_height + surface_offset ])
linear_extrude(height = disp_height - 0.2, scale = 1) square([ disp_x, disp_y - 1 ], center = true);
color([ 0, 0, 0 ]) translate([ 0, disp_y_center_offset + 0.6, stem_height - 0.2 + surface_offset ])
linear_extrude(height = 0.05, scale = 1) square([ 10.2, 6.2 ], center = true);
}
module cable()
{
color([ 1, 0.5, 0.3 ]) union()
{
translate([ -4, -disp_y / 2 + 1.5, stem_height - 2.5 ]) rotate([ 180, -90, 0 ]) linear_extrude(8)
{
arc(2, [ 0, 90 ], 0.05);
translate([ -5, 2, 0 ]) square([ 10, 0.05 ], center = true);
}
}
}
module mx_stem(u_size, angle = 0, extra_len = 0, txt = revision)
{
difference()
{
union()
{
translate([ 0, 0, extra_len ]) rotate([ angle, 0, 0 ]) difference()
{
// hollow keycap
union()
{
translate([ (u_size - 1) * 2 * 5, 0, 0 ])
linear_extrude(height = stem_height, scale = stem_top_bottom_ratio)
square([ stem_x, stem_y ], center = true);
translate([ -(u_size - 1) * 2 * 5, 0, 0 ])
linear_extrude(height = stem_height, scale = stem_top_bottom_ratio)
square([ stem_x, stem_y ], center = true);
}
union()
{
translate([ (u_size - 1) * 2 * 5, 0, -surface_offset ])
linear_extrude(height = inside_hight, scale = stem_top_bottom_ratio)
square([ inside_x, inside_y ], center = true);
translate([ -(u_size - 1) * 2 * 5, 0, -surface_offset ])
linear_extrude(height = inside_hight, scale = stem_top_bottom_ratio)
square([ inside_x, inside_y ], center = true);
//take away a little extra for the bulky switches
translate([ 0, 0, -surface_offset ])
linear_extrude(height = inside_hight, scale = stem_top_bottom_ratio*0.85)
square([ (inside_x+inside_x+stem_x)/3, (inside_y+stem_y)/2 ], center = true);
}
// display cut-out
translate([ 0, disp_y_center_offset, stem_height - disp_height + surface_offset ])
linear_extrude(height = disp_height, scale = 1) square([ disp_x, disp_y ], center = true);
translate([
0, disp_y_center_offset - disp_y / 2 - cable_stem_y / 2 + surface_offset,
stem_height - disp_height +
surface_offset
]) linear_extrude(height = disp_height, scale = 1)
square([ cable_stem_x, cable_stem_y ], center = true);
// FFC cutout
translate([
0, disp_y_center_offset - disp_y / 2 - cable_stem_y - cable_thickness / 2 + surface_offset * 2,
stem_height +
surface_offset
]) rotate([ 0, 180, 0 ]) linear_extrude(height = stem_height + surface_offset * 2, scale = [ 1, 7 ])
square([ cable_stem_x, cable_thickness ], center = true);
translate([
0, disp_y_center_offset - disp_y / 2 - cable_stem_y - 0.05,
stem_height - disp_height + surface_offset * 2 - 1
]) linear_extrude(height = 1, scale = [ 1, 10 ]) square([ cable_stem_x, 0.2 ], center = true);
translate([ 0, -cable_stem_x / 2, -surface_offset ]) linear_extrude(height = inside_hight)
square([ cable_stem_x, cable_stem_x ], center = true);
// revision text
translate(
[ 0, disp_y / 2 - text_size / 2, stem_height - disp_height - text_height + surface_offset * 2 ])
rotate([ 0, 0, 0 ]) linear_extrude(height = text_height)
{
text(txt, size = text_size, font = text_font, halign = "center", valign = "center", $fn = 16);
}
translate(
[ 0, - disp_y / 3, inside_hight + text_height-0.01 ])
rotate([ 180, 0, 0 ]) linear_extrude(height = text_height)
{
text(txt, size = text_size, font = text_font, halign = "center", valign = "center", $fn = 16);
}
}
// stem
union()
{
translate([ 0, 0, 0 ]) cylinder(r = mx_cylinder / 2, h = stem_height - disp_height - 1 + extra_len,
$fn = 128, center = false);
translate([ 0, 0, 2.5 + extra_len ])
cylinder(r1 = mx_cylinder / 2, r2 = mx_cylinder / 2 + 1.2, h = 1.4, $fn = 128, center = false);
}
}
// cut out cross
translate([ 0, 0, -surface_offset ]) linear_extrude(height = stem_height * 2, scale = 0.97)
{
offset(r = -mx_cross_fillet)
{
union()
{
square([ mx_cross + mx_cross_fillet, mx_cross_width + mx_cross_fillet ], center = true);
square([ mx_cross_width + mx_cross_fillet, mx_cross + mx_cross_fillet ], center = true);
}
}
translate([ -mx_cross / 3, 0, 0 ]) circle(d = (mx_cross_width - mx_cross_fillet) * 1.1, $fn = 64);
translate([ mx_cross / 3, 0, 0 ]) circle(d = (mx_cross_width - mx_cross_fillet) * 1.1, $fn = 64);
translate([ 0, -mx_cross / 3, 0 ]) circle(d = (mx_cross_width - mx_cross_fillet) * 1.1, $fn = 64);
translate([ 0, mx_cross / 3, 0 ]) circle(d = (mx_cross_width - mx_cross_fillet) * 1.1, $fn = 64);
}
// camfer at bottom
translate([ 0, 0, -surface_offset ]) linear_extrude(height = mx_cross_fillet, scale = [
mx_cross / (mx_cross + 2 * mx_cross_fillet) - 0.011,
mx_cross_width / (mx_cross_width + 2 * mx_cross_fillet) - 0.07
]) square([ mx_cross + mx_cross_fillet, mx_cross_width + mx_cross_fillet ], center = true);
translate([ 0, 0, -surface_offset ]) linear_extrude(height = mx_cross_fillet, scale = [
mx_cross_width / (mx_cross_width + 2 * mx_cross_fillet) - 0.07,
mx_cross / (mx_cross + 2 * mx_cross_fillet) - 0.011
]) square([ mx_cross_width + mx_cross_fillet, mx_cross + mx_cross_fillet ], center = true);
}
}
// mx_stem(u_size=1);
/*
display();
cable();
*/
// 10p
module ten_connected_pieces_1U(angle = 0, extra_len = 0, txt = revision)
{
clusters = 0;
rows = 5;
union()
{
for (r = [0:clusters])
{
translate([ 0, 0, r * 36 ])
{
for (i = [0:rows - 1])
{
translate([ i * 22 - 5, 0, 6 ]) rotate([ -90, 180, 180 ])
mx_stem(u_size = 1, angle = angle, extra_len = extra_len, txt = txt);
translate([ i * 22 - 5, 0, -7 ]) rotate([ 90, 0, 0 ])
cylinder(r = 0.75, h = 4.3 + extra_len / 2, $fn = 128, center = false);
translate([ i * 22 - 5, 0, -11.9 ]) rotate([ -90, 0, 180 ])
mx_stem(u_size = 1, angle = angle, extra_len = extra_len, txt = txt);
translate([ i * 22 - 5, 0, 1.1 ]) rotate([ 90, 0, 0 ])
cylinder(r = 0.75, h = 4.3 + extra_len / 2, $fn = 128, center = false);
translate([ i * 22 - 5, 0, 1.5 ]) rotate([ 0, 180, 0 ])
cylinder(r = 0.75, h = 9, $fn = 128, center = false);
}
translate([ -5, 0, -3 ]) rotate([ 0, 90, 0 ])
cylinder(r = 0.75, h = (rows - 0.5) * 22 - 11, $fn = 128, center = false);
}
if (clusters > 0)
{
translate([ r * 22 * 2 - 5 + 11, 1, -4 ]) rotate([ 0, 0, 0 ])
cylinder(r = 0.75, h = 74, $fn = 128, center = false);
}
}
}
}
module ten_connected_pieces_1U25(angle = 0, extra_len = 0, txt = revision)
{
clusters = 0;
rows = 5;
union()
{
for (r = [0:clusters])
{
translate([ 0, 0, r * 36 ])
{
for (i = [0:rows - 1])
{
translate([ i * 22 - 5, 0, 6 ]) rotate([ -90, 180, 180 ])
mx_stem(u_size = 1.22, angle = angle, extra_len = extra_len, txt = txt);
translate([ i * 22 - 5, 0, -7 ]) rotate([ 90, 0, 0 ])
cylinder(r = 0.75, h = 4.3 + extra_len / 2, $fn = 128, center = false);
translate([ i * 22 - 5, 0, -11.9 ]) rotate([ -90, 0, 180 ])
mx_stem(u_size = 1.22, angle = angle, extra_len = extra_len, txt = txt);
translate([ i * 22 - 5, 0, 1.1 ]) rotate([ 90, 0, 0 ])
cylinder(r = 0.75, h = 4.3 + extra_len / 2, $fn = 128, center = false);
translate([ i * 22 - 5, 0, 1.5 ]) rotate([ 0, 180, 0 ])
cylinder(r = 0.75, h = 9, $fn = 128, center = false);
}
translate([ -5, 0, -3 ]) rotate([ 0, 90, 0 ])
cylinder(r = 0.75, h = (rows - 0.5) * 22 - 11, $fn = 128, center = false);
}
if (clusters > 0)
{
translate([ r * 22 * 2 - 5 + 11, 1, -4 ]) rotate([ 0, 0, 0 ])
cylinder(r = 0.75, h = 74, $fn = 128, center = false);
}
}
}
}
module ten_connected_pieces_1U5(angle = 0, extra_len = 0, txt = revision)
{
union()
{
for (i = [0:4])
{
translate([ i * 27 - 5, 0, 6 ]) rotate([ -90, 180, 180 ])
mx_stem(u_size = 1.47, angle = angle, extra_len = extra_len, txt = txt);
translate([ i * 27 - 5, 0, -7 ]) rotate([ 90, 0, 0 ]) cylinder(r = 0.75, h = 6, $fn = 128, center = false);
translate([ i * 27 - 5, 0, -11.9 ]) rotate([ -90, 0, 180 ])
mx_stem(u_size = 1.47, angle = angle, extra_len = extra_len, txt = txt);
translate([ i * 27 - 5, 0, 1.1 ]) rotate([ 90, 0, 0 ]) cylinder(r = 0.75, h = 6, $fn = 128, center = false);
translate([ i * 27 - 5, 0, 1.5 ]) rotate([ 0, 180, 0 ])
cylinder(r = 0.75, h = 9, $fn = 128, center = false);
}
translate([ -5, 0, -3 ]) rotate([ 0, 90, 0 ]) cylinder(r = 0.75, h = 4.5 * 27 - 11, $fn = 128, center = false);
}
}
// Stepped Profile
ten_connected_pieces_1U25(angle = -7, extra_len=1.5, txt=str("S ", revision));
//ten_connected_pieces_1U(angle = -7, extra_len=1.5, txt=str("S ", revision));
// mx_stem(u_size=1.22, angle = -7, extra_len=1.5, txt=str("S ", revision));
// mx_stem(u_size=1, angle = -7, extra_len=1.5, txt=str("S ", revision));
//mx_stem(u_size=1, angle = 5, extra_len=0.5, txt=str("R1 ", revision));
// Curved Profile
//ten_connected_pieces_1U25(angle = 10, extra_len=4, txt=str("5 ", revision));
// ten_connected_pieces_1U25(angle = 5, extra_len=1.5, txt=str("4 ", revision));
// ten_connected_pieces_1U25(angle = 0, extra_len=0, txt=str("3 ", revision));
//ten_connected_pieces_1U25(angle = -5, extra_len=1, txt=str("2 ", revision));
//ten_connected_pieces_1U25(angle = 5, extra_len=0.5, txt=str("1 ", revision));
//ten_connected_pieces_1U(angle = 10, extra_len = 4, txt = str("5 ", revision));
// ten_connected_pieces_1U(angle = 5, extra_len=1.5, txt=str("4 ", revision));
// ten_connected_pieces_1U(angle = 0, extra_len=0, txt=str("3 ", revision));
//ten_connected_pieces_1U(angle = -5, extra_len=1, txt=str("2 ", revision));
//ten_connected_pieces_1U(angle = 5, extra_len=0.5, txt=str("1 ", revision));
// Pictures
/*
translate([0,19.25*3,0]) mx_stem(u_size=1, angle = 10, extra_len=3, txt="R5r2");
translate([0,19.25*2,0]) mx_stem(u_size=1, angle = 5, extra_len=0.5, txt="R4r2");
translate([0,19.25,0]) mx_stem(u_size=1, txt="R3r2");
mx_stem(u_size=1, angle = -5, extra_len=0.5, txt="R2r2");
translate([0,-19.25,0]) mx_stem(u_size=1, angle = 5, extra_len=0.5, txt="R1r2");
*/
/*
rotate([0,0,0]){
translate([0,19.25*3,0]) mx_stem(u_size=1, angle = -5, extra_len=0.5, txt="R2r2");
translate([0,19.25*2,0]) mx_stem(u_size=1, angle = -5, extra_len=0.5, txt="R2r2");
translate([0,19.25,0]) mx_stem(u_size=1, angle = -5, extra_len=0.5, txt="R2r2");
mx_stem(u_size=1, angle = -5, extra_len=0.5, txt="R2r2");
translate([0,-19.25,0]) mx_stem(u_size=1, angle = -5, extra_len=0.5, txt="R2r2");
}
*/
/*
translate([0,19.25*3,0]) mx_stem(u_size=1, angle = 0, extra_len=0, txt="R3r3");
translate([0,19.25*2,0]) mx_stem(u_size=1, angle = 0, extra_len=0, txt="R3r3");
translate([0,19.25,0]) mx_stem(u_size=1, angle = 0, extra_len=0, txt="R3r3");
mx_stem(u_size=1, angle = 0, extra_len=0, txt="R3r3");
translate([0,-19.25,0]) mx_stem(u_size=1, angle = 0, extra_len=0, txt="R3r3");
*/
// color([0,0.5,0], 0.4) translate([0,0,-1]) cube([100,100,2], center=true);