Improve fret number markers on T-riple
Also do them on both sides for ambidextrous neck
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T-riple.scad
98
T-riple.scad
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@ -6,7 +6,8 @@ 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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profile_arc_steps_backside = $preview ? 8 : 180;
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profile_arc_steps_topside = $preview ? 8 : 20;
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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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@ -20,13 +21,22 @@ 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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x_min = standard_profile_center_x - tube_radius;
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standard_y_width = 26.4517;
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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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z0 = fsl(0);
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function get_desired_width_scale(z) = 2.0-(z/z0);
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function get_desired_profile_radius(ws) =
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let (
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x = fingerboard_max_thick,
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y = standard_y_width*0.5*ws,
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cc = tri_circumcenter([[x, -y], [x, y], [x_min, 0]])
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)
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cc[0]-x_min;
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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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@ -42,28 +52,28 @@ module tube(from_fret, to_fret, scale_offset = 0, fingerboard_min_thick = 2.5, f
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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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module outline_xy(width_scale = 1.0, x_max = fingerboard_max_thick, rounding_radius = 1.5, backside = true, topside = true) {
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profile_radius = get_desired_profile_radius(width_scale);
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profile_radius_scale = profile_radius / 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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// Backside should join up relatively straight across the whole mesh
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a_backside_start = acos((-2-profile_center_x)/profile_radius);
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a_backside_end = 360 - a_backside_start;
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a_backside_step = (a_backside_end - a_backside_start)/profile_arc_steps_backside;
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// Frontside should have very detailed topology
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a_topside_start = acos((x_max-profile_center_x)/profile_radius);
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a_topside_end = 360 - a_topside_start;
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a_topside_step = (a_backside_start - a_topside_start)/profile_arc_steps_topside;
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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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backside_points = backside ? [for (i = [0:profile_arc_steps_backside]) pt(a_backside_start + i*a_backside_step)] : [];
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topside_points_1 = topside ? [for (i = [0:profile_arc_steps_topside]) pt(a_topside_start + i*a_topside_step)] : [];
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topside_points_2 = topside ? [for (i = [0:profile_arc_steps_topside]) pt(a_backside_end + i*a_topside_step)] : [];
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polygon(points = concat(topside_points_1, backside_points, topside_points_2));
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top_width = pt(a_topside_start)[1] * 2;
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echo(str("WScale=", width_scale, " PScale=", profile_radius_scale, " r=", profile_radius, " has top width of ", top_width, " divides to ", top_width/width_scale, " (goal is 26.4517)"));
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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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@ -98,8 +108,8 @@ module tube(from_fret, to_fret, scale_offset = 0, fingerboard_min_thick = 2.5, f
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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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translate([0,0,Cap_Length]) linear_extrude(0.001) outline_xy(get_desired_width_scale(z_max), topside=true);
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translate([0,0,0]) linear_extrude(0.001) outline_xy(get_desired_width_scale(z_min), topside=true);
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}
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union() {
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color("black") fret_bumps();
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@ -119,25 +129,37 @@ module tube(from_fret, to_fret, scale_offset = 0, fingerboard_min_thick = 2.5, f
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// color("red") scallops();
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}
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module fret_number_markers(engrave_depth=1) {
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color("purple")
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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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zn = fsl(fret);
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pr = get_desired_profile_radius(get_desired_width_scale(zn));
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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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// translate([-3,-16,zn-z_offset]) rotate([90,25,16]) linear_extrude(100) {
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// translate([-3,-16,zn-z_offset]) rotate([90,25,-16+16*(zn/z0)]) linear_extrude(100) {
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p_x0 = pr+x_min;
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translate([p_x0, 0, zn-z_offset]) rotate([90,25,-asin((p_x0+2)/pr)]) translate([0, 0, pr-engrave_depth]) linear_extrude(engrave_depth+1) {
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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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translate([p_x0, 0, zn-z_offset]) rotate([90,-25,180+asin((p_x0+2)/pr)]) translate([0, 0, pr-engrave_depth]) linear_extrude(engrave_depth+1) {
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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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difference() {
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solid_tube(1.5);
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linear_extrude(Cap_Length) T_hole();
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fret_number_markers();
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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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