CFTubes 01 print
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include <common.scad>
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Guitar_Scale_Length_mm = 610; // millimetres, slightly over 24inch (609.6mm) Jaguar scale, should be fine for guitar and u-bass
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assert(fret_scale_length(0) == 610); // Make sure the function correctly uses our changed global
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CF_Tube_Dia = 5.0;
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CF_Square_Width = 6.0;
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// Philippians 4:8
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// Gideon 真実な, 尊ぶべき, 正しい, 清い, 愛すべき, 評判の良い, 徳とされる, 称賛に値する
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// ShinKaiYaku65 最後に、兄弟たち。すべての真実なこと、すべての誉れあること、すべての正しいこと、すべてのきよいこと、すべての愛すべきこと、すべての評判の良いこと、そのほか徳と言われること、称賛に値することがあるならば、そのようなことに心を留めなさい。
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// I swapped 愛 and 評判 because 12th fret should be the biggest marker, and having only 15 as a 2char marker would be too disorienting
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// going with 良 for 21
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fret_inlays = [[3, "真"], [5, "尊"], [7, "正"], [9, "清"], [12, "評判"], [15, "愛"], [17, "徳"], [19, "賛"], [21, "良"], [24, "主イエス"]];
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module neck(string_spacing=18, string_margin=5, num_strings=3, target_neck_thickness=15, scallop_depth=3, num_frets=24, fret_width=2.4) {
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neck_length = fret_scale_length(0)+fret_width/2;
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neck_width = (num_strings-1)*string_spacing + string_margin*2;
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// Could do some trig to work out exactly how much to add for the scallop depth, but we're subtracting anyway
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angle_excess = 20;
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module neck_stock() {
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rotate([-90, 0, 0])
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linear_extrude(neck_length)
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polygon([for (a = [90-angle_excess:1:270+angle_excess]) [neck_width*0.5*sin(a), -target_neck_thickness*cos(a)]]);
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}
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module scallops() {
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for (fret = [0:num_frets]) {
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x0 = fret_scale_length(fret-1) - fret_width/2;
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x1 = fret_scale_length(fret) + fret_width/2;
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xmid = lerp(x0, x1, 0.5);
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// Radius it?
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arc = arc_points([[x0, scallop_depth], [x1, scallop_depth], [xmid, 0]]);
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echo(arc);
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rotate([90, 0, 90]) linear_extrude(neck_width, center=true) polygon(arc);
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}
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}
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module fret_bumps() {
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for (fret = [0:num_frets]) {
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translate([0, fret_scale_length(fret), scallop_depth])
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rotate([0, 90]) cylinder(d=fret_width, h = neck_width, center = true, $fn=200);
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}
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}
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module fret_inlays() {
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for (num_text = fret_inlays) {
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fret = num_text[0];
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x0 = fret_scale_length(fret-1);
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x1 = fret_scale_length(fret);
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diff = x0 - x1;
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translate([0, lerp(x0, x1, 0.5), -0.5])
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linear_extrude(30)
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text(text = num_text[1], font = JP_Serif_Font, halign = "center", valign = "center", size = clamp(2, diff-fret_width*2-2, 10));
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}
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}
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module fret_side_markers() {
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for (num_text = fret_inlays) {
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fret = num_text[0];
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x0 = fret_scale_length(fret-1);
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x1 = fret_scale_length(fret);
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diff = x0 - x1;
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rotate([0, -90, 0])
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translate([0, x1, neck_width/2-3])
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linear_extrude(50)
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rotate(-35)
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text(text = str(fret), font = JP_Serif_Font, halign = "right", valign = "center", size = 5);
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}
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}
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// scallops();
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render() difference() {
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neck_stock();
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scallops();
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fret_inlays();
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fret_side_markers();
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translate([-neck_width, 0, scallop_depth]) cube([neck_width*2, Guitar_Scale_Length_mm*3, target_neck_thickness*3]);
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}
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intersection() {
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fret_bumps();
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neck_stock();
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}
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}
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module cf_tube(tolerance = 0.1) {
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rotate([-90,0,0])
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cylinder(h=Guitar_Scale_Length_mm+10, d=CF_Tube_Dia+tolerance, $fn=360);
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}
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module cf_square(tolerance = 0.1) {
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x = CF_Square_Width+tolerance;
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translate([-x/2, 0, -x/2])
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cube([x, Guitar_Scale_Length_mm+10, x]);
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}
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difference() {
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neck();
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for (i = [-1:2:1])
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translate([i*15, 0, -4])
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cf_tube();
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for (i = [-1:2:1])
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translate([i*7.5, 0, -7])
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cf_square();
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translate([0, 0, -10])
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cf_tube();
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echo(fret_scale_length(0) - fret_scale_length(8)); // 225.724
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echo(fret_scale_length(8) - fret_scale_length(25)); // 240.335
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segment_cut = fret_scale_length(8)-1.2;
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translate([-50, 0, -50]) cube([100, segment_cut, 100]);
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rotate([90, 0, 0]) linear_extrude((segment_cut+0.3)*2, center=true) text(text = "01", font = JP_Serif_Font, halign = "center", valign = "center", size = 4);
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}
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32
common.scad
32
common.scad
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@ -4,3 +4,35 @@ function log2(x) = ln(x)/ln2;
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function fret_scale_length(n) = Guitar_Scale_Length_mm * 2^(-n/12);
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function mm_to_fret_number(mm) = -log2(mm/Guitar_Scale_Length_mm)*12;
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function lerp(start, end, amount) = start + (end-start)*amount;
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function clamp(minimum, value, maximum) = min(max(minimum, value), maximum);
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function tri_circumcenter(pts) =
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let(
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v0 = pts[1] - pts[0],
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v1 = pts[2] - pts[1],
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d0 = (pts[1] + pts[0])/2 * v0,
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d1 = (pts[2] + pts[1])/2 * v1,
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det = -cross(v0, v1)
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)
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[cross([d1, d0], [v1.y, v0.y]), cross([d0, d1], [v0.x, v1.x])] / det;
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// Create a circle containing all 3 points, then plot the arc between the first two points
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function arc_points(tri_points, fragments_per_mm=5) =
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let(
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cc = tri_circumcenter(tri_points),
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r = norm(tri_points[0] - cc),
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steps = ceil((norm(tri_points[2] - tri_points[0]) + norm(tri_points[2] - tri_points[1]))*fragments_per_mm),
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normalized0 = (tri_points[0] - cc)/r,
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normalized1 = (tri_points[1] - cc)/r,
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a_start = atan2(normalized0[1], normalized0[0]),
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a_end = atan2(normalized1[1], normalized1[0]),
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a_sweep = a_end - a_start,
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a_step = a_sweep/steps
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)
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[for (i = [0:steps]) r*[cos(a_start+i*a_step), sin(a_start+i*a_step)] + cc];
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// We can't use Droid Sans Japanese because the rendering library is really dumb and will pick the wrong Droid Sans. CJK fonts must be singular files.
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JP_Serif_Font = "New Tegomin";
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JP_Sans_Font = "Yuji Boku";
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JP_Fat_Sans_Font = ["Potta One", "Yusei Magic"];
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JP_Light_Sans_Fonts = ["Hachi Maru Pop", "MotoyaLMaru", "Rounded MPlus 1c"];
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