153 lines
5.7 KiB
OpenSCAD
153 lines
5.7 KiB
OpenSCAD
include <common.scad>
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include <AluTCommon.scad>
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semitone_strings = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "X", "XI"];
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octave_strings = ["", "˙", "¨", "¯"];
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octave_scales = [1.1, 1, 0.9, 0.8];
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z_resolution = $preview ? 0.5 : 0.1;
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profile_arc_steps = $preview ? 10 : 180;
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// $fn = $preview ? 32 : 512;
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// mink_fn = $preview ? 12 : 128;
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// mink_fn_2d = $preview ? 32 : 256;
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// $fn = 32;
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// mink_fn = 12;
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// mink_fn_2d = 32;
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fret_width = 2.4; //2.8; // Jumbo = 0.11", 0.055" tall
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zero_fret_width = fret_width*1.5;
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zero_fret_extra_height = 1.2;
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fret_angle = 60; //Fret angle of 45° is normal, anything over 60 will not work correctly
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tube_radius = Cap_Spine + T_circumcenter[0];
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standard_profile_center_x = T_circumcenter[0];
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module tube(from_fret, to_fret, scale_offset = 0, fingerboard_min_thick = 2.5, fingerboard_max_thick = 5) {
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function fsl(fret_number) = fret_scale_length(fret_number + scale_offset);
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// z_min = (fsl(to_fret) + fsl(to_fret+1))/2;
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// z_max = (fsl(from_fret) + fsl(from_fret-1))/2;
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z_min = fsl(to_fret) - fret_width/2;
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z_max = fsl(from_fret) + zero_fret_width/2;
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z_offset = z_min;
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Cap_Length = z_max - z_min;
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echo(str("Cap length from fret ", from_fret, " to ", to_fret, " is ", Cap_Length, "mm"));
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module solid_tube(cap_taper = 1.5) {
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function get_x_max(z) =
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let (
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fret_num = mm_to_fret_number(z)-scale_offset,
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nearest_fret = round(fret_num),
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nearest_fret_height = fingerboard_max_thick + ((nearest_fret == 0) ? zero_fret_extra_height : 0),
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nearest_fret_mm = fsl(nearest_fret)
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)
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z;
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module outline_xy(profile_radius_scale = 1.0, x_max = fingerboard_max_thick, rounding_radius = 1.5) {
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profile_radius = profile_radius_scale * tube_radius;
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profile_center_x = (profile_radius_scale-1.0)*tube_radius + standard_profile_center_x;
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// minkowski method does exactly what we want, but it is slow (sweep a circle around the outline)
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// minkowski($fn = mink_fn_2d) {
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// circle(r = rounding_radius);
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// difference() {
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// translate([profile_center_x, 0, 0]) circle(r = tube_radius*profile_radius_scale - rounding_radius);
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// translate([fingerboard_max_thick - rounding_radius, -50]) square([100,100]);
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// }
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// }
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// make a circle and chop the top off (no edge rounding)
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// difference() {
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// translate([profile_center_x, 0, 0]) circle(r = profile_radius);
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// translate([x_max, -50]) square([100,100]);
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// }
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a_start = acos((x_max-profile_center_x)/profile_radius);
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a_end = 360 - a_start;
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a_step = (a_end - a_start)/profile_arc_steps;
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echo(str("profile_radius_scale is ", profile_radius_scale, " profile_center_x is ", profile_center_x, " a_start is ", a_start, " a_end is ", a_end));
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function pt(a) = [profile_center_x + profile_radius*cos(a), profile_radius*sin(a)];
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polygon(points = [for (i = [0:profile_arc_steps]) pt(a_start + i*a_step)]);
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}
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module fret_bumps(w=100) {
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translate([fingerboard_max_thick - fret_width/2, w/2, -z_offset + fsl(from_fret)])
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rotate([90,0,0]) cylinder(h = w, r = zero_fret_width/2, $fn=32);
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translate([fingerboard_max_thick - fret_width/2, w/2, -z_offset])
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for (fret = [from_fret+1:to_fret])
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translate([0, 0, fsl(fret)])
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rotate([90,0,0]) cylinder(h = w, r = fret_width/2, $fn=32);
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}
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module scallops(w=100) {
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// for (fret = [from_fret:to_fret+1])
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for (fret = [from_fret:to_fret])
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let(
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f_prev = fsl(fret-1) - z_offset,
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f_next = fsl(fret) - z_offset,
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o = fret_width/2 * sin(fret_angle),
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x0 = f_prev - o,
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x1 = f_next + o,
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y0 = fingerboard_min_thick,
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y1 = fingerboard_max_thick - (fret_width/2 * cos(fret_angle)),
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pts = [[x0, y1], [x1, y1], [(x0+x1)/2, y0]],
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cc = tri_circumcenter(pts),
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r = norm([x0, y1] - cc)
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) {
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translate([0,-w/2,0])
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rotate([-90,-90,0])
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translate(cc) cylinder(h = w, r = r);
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}
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}
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module basic_fretboard() {
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intersection() {
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hull() {
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translate([0,0,Cap_Length]) linear_extrude(0.001) outline_xy(1.0);
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translate([0,0,0]) linear_extrude(0.001) outline_xy(1.75);
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}
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union() {
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color("black") fret_bumps();
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color("white", alpha=0.01) translate([-50,-50,0]) cube([50 + fingerboard_max_thick - (fret_width/2 * cos(fret_angle)), 100, Cap_Length]);
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}
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}
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}
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// Make a solid tube and then subtract the notches
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difference() {
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basic_fretboard();
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difference() {
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color("red") scallops();
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color("blue") fret_bumps();
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}
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}
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// color("red") scallops();
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}
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difference() {
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solid_tube(1.5);
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linear_extrude(Cap_Length) T_hole();
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tapered_T_hole(z0 = 0, z1 = 3);
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tapered_T_hole(z0 = Cap_Length-3, z1 = Cap_Length+0.0001, o0 = 0, o1 = 1);
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// Version number
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translate([-10,10,Cap_Length-0.5]) linear_extrude(1) text("06", size=5, halign="center", valign="center", font="Noto Sans");
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// Fret number markers
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color("black")
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// for (fret = [from_fret:to_fret])
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for (fret = [from_fret+1:to_fret])
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translate([-3,-16,fsl(fret)-z_offset]) rotate([90,25,16]) linear_extrude(40) {
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octave = floor(fret/12);
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semitone = fret%12;
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octave_scale = octave_scales[octave];
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text(semitone_strings[semitone], size=4*octave_scale, halign="center", valign="center", font="Noto Sans");
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text(octave_strings[octave], size=6*octave_scale, halign="center", valign="center", font="Noto Sans");
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}
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}
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}
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tube(from_fret = 0, to_fret = 36, scale_offset = -5);
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//translate([50, 0]) tube(from_fret = -4, to_fret = -3);
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//translate([100, 0]) tube(from_fret = -2, to_fret = 0);
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//translate([150, 0]) tube(from_fret = 1, to_fret = 3);
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//translate([200, 0]) tube(from_fret = 4, to_fret = 7);
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//translate([250, 0]) tube(from_fret = 8, to_fret = 12);
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//translate([300, 0]) tube(from_fret = 13, to_fret = 19);
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//translate([350, 0]) tube(from_fret = 20, to_fret = 30);
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