PETG Classical guitar neck 1alpha
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CFTubes.scad
111
CFTubes.scad
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@ -343,35 +343,61 @@ module bridge(string_spacing=18, string_margin=4.5, num_strings=3, target_neck_t
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module Nylon6String() {
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fsl_mm = fret_scale_length(0);
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echo(str("Making a Nylon 6 String with scale length ", fsl_mm, "mm = ", fsl_mm/25.4, "in"))
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assert(fsl_mm == Classical_Short_Scale_mm); // Make sure the function correctly uses our changed global
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string_diameters_thous = [28, 32, 40, 30, 36, 42];
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string_diameters_mm = string_diameters_thous * 0.0254;
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num_frets = 20;
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num_strings = 6;
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// 56mm wide neck
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string_spacing = 10; // 50mm E to e
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string_margin = 3; // +6
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neck_width = string_spacing*(num_strings-1) + string_margin*2;
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scallop_depth = 2.5;
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target_neck_thickness = 22;
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fret_width=2.4;
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echo(str("Making a Nylon 6 String with scale length ", fsl_mm, "mm = ", fsl_mm/25.4, "in and neck width ", neck_width, "mm"));
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assert(fsl_mm == Classical_Short_Scale_mm); // Make sure the function correctly uses our changed global
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function CF_Span_Coords(full_length = 700, ply = 3) = [for (i=[0:ply-1]) [0, lerp(0, full_length-CF_Tube_Len, i/(ply-1)), CF_Square_Width*i]];
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module CF_Span(full_length = 700, ply = 3, hole = true) {
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for (v = CF_Span_Coords(full_length, ply))
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translate(v) CFSquare(hole=hole);
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}
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reinforcing_tube_positions = flatten([
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[
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for (i=[-1,1]) each [
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// Headside reinforcement
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[i*21, -40+280, -4],
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[i*17, -40+280, -12],
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// Bridgeside reinforcement
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[i*16, -40, -7],
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]
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],
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[
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// Bridgeside reinforcement
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[0, -40, -4],
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[0, -40, -15],
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]]);
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echo(reinforcing_tube_positions);
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// Through span construction
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span_coords = CF_Span_Coords();
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reinforcing_square_positions = [
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for (i=[-1,1]) each [ for (v = span_coords) [i*10, -40, -16] + v ]
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];
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echo(reinforcing_square_positions);
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// neck(num_frets=num_frets, num_strings=num_strings, string_margin=string_margin, string_spacing=string_spacing);
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module CF_Span(full_length = 700, ply = 3, hole = true) {
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for (i=[0:ply-1])
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translate([0, lerp(0, full_length-CF_Tube_Len, i/(ply-1)), CF_Square_Width*i]) CFSquare(hole=hole);
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}
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// for (m=[0,11]) mirror([m, 0, 0]) color([0.4, 0.5, 0.5]) translate([9, -40, -16]) CF_Span();
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// CFTube();
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// %neck(num_frets=num_frets, num_strings=num_strings, string_margin=string_margin, string_spacing=string_spacing, scallop_depth=scallop_depth, target_neck_thickness=target_neck_thickness);
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module NeckFragment(from_fret, to_fret, to_origin=true, include_from_fret=false) {
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module NeckFragment(from_fret, to_fret, to_origin=true, include_from_fret=false, test_tolerances_piece=false) {
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x0 = fret_scale_length(to_fret) - fret_width/2;
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x1 = fret_scale_length(from_fret) + ((include_from_fret)?1:(-1)) * fret_width/2;
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xn = fsl_mm + fret_width;
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translate([0,to_origin ? -x0 : 0,0]) render() difference() {
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neck(num_frets=num_frets, num_strings=num_strings, string_margin=string_margin, string_spacing=string_spacing, scallop_depth=scallop_depth, target_neck_thickness=target_neck_thickness);
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translate([-100, 0, -100]) cube([200, x0, 200]);
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translate([-100, x1, -100]) cube([200, xn-x1, 200]);
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module TestTolerancesPiece() {
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for (m=[0,11]) mirror([m, 0, 0]) color([0.4, 0.5, 0.5]) translate([9, 0, -16+(CF_Square_Width*2)]) CFSquareCutout(x0, x1, taper_length=2);
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translate([ 12,0,-14]) CFSquareCutout(x0, x1, taper_length=2);
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translate([ 12-CF_Square_Width,0,-14]) CFSquareCutout(x0, x1-8, taper_length=2, taper_x2=false);
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@ -379,22 +405,57 @@ module Nylon6String() {
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translate([-12+CF_Square_Width,0,-14]) CFSquareCutout(x0+8, x1, taper_length=2, taper_x1=false);
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translate([20,0,-6]) CFTubeCutout(x0, x1, taper_length=2);
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}
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}
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difference(){
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NeckFragment(2, 3);
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translate([-20,0,-1]) rotate([-90,180,180]) linear_extrude(3, center=true) text("PETG", size=3.5, halign="center", valign="center");
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translate([-20,0,-6]) rotate([-90,180,180]) linear_extrude(3, center=true) text("1α", size=3.5, halign="center", valign="center");
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translate([0,to_origin ? -x0 : 0,0]) render() difference() {
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neck(num_frets=num_frets, num_strings=num_strings, string_margin=string_margin, string_spacing=string_spacing, scallop_depth=scallop_depth, target_neck_thickness=target_neck_thickness);
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translate([-100, 0, -100]) cube([200, x0, 200]);
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translate([-100, x1, -100]) cube([200, xn-x1, 200]);
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for (v = reinforcing_tube_positions) CFTubeCutout2(v, x0, x1);
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for (v = reinforcing_square_positions) CFSquareCutout2(v, x0, x1);
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if (test_tolerances_piece) TestTolerancesPiece();
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}
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}
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// translate([0,0,30]) difference() {
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// neck(num_frets=num_frets, num_strings=num_strings, string_margin=string_margin, string_spacing=string_spacing, scallop_depth=scallop_depth, target_neck_thickness=target_neck_thickness);
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// for (m=[0,11]) mirror([m, 0, 0]) color([0.4, 0.5, 0.5]) translate([9, -40, -16]) CF_Span(hole=false);
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// }
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// Test tolerances piece
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module TestTolerancesPiece() {
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difference(){
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NeckFragment(2, 3, test_tolerances_piece=true);
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translate([-20,0,-1]) rotate([-90,180,180]) linear_extrude(3, center=true) text("PETG", size=3.5, halign="center", valign="center");
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translate([-20,0,-6]) rotate([-90,180,180]) linear_extrude(3, center=true) text("1α", size=3.5, halign="center", valign="center");
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}
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}
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// TestTolerancesPiece();
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// for (m=[0,11]) mirror([m, 0, 0]) translate([29,10,-32]) rotate([0,-90,0]) NylonTuner();
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module RealPiece(from_fret, to_fret, include_from_fret=false) {
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midpoint = (fret_scale_length(from_fret) - fret_scale_length(to_fret) + (include_from_fret ? fret_width : 0))/2;
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render() difference(){
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NeckFragment(from_fret, to_fret, include_from_fret=include_from_fret);
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color("red") for (ra = [[0,0,0], [0,0,180]]) rotate_around(ra, [0,midpoint,0])
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translate([0,0,-9]) rotate([-90,180,180]) linear_extrude(3, center=true) text("PETG1α", size=2.5, halign="center", valign="center");
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}
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}
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RealPiece(0, 8, include_from_fret=true);
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%translate([100, 0, 0]) RealPiece(8, 21);
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%translate([-100,0,0]) union() {
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c_cf = [0.4, 0.5, 0.5];
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%neck(num_frets=num_frets, num_strings=num_strings, string_margin=string_margin, string_spacing=string_spacing, scallop_depth=scallop_depth, target_neck_thickness=target_neck_thickness);
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// CF square stacks
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for (v = reinforcing_tube_positions) color(c_cf) translate(v) CFTube();
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for (v = reinforcing_square_positions) color(c_cf) translate(v) CFSquare();
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// Approximate tuner placement
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for (m=[0,1]) mirror([m, 0, 0]) translate([29,10,-32]) rotate([0,-90,0]) NylonTuner();
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// Render strings above for spacing reference
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string_excess = 80;
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for (i = [0:num_strings-1]) {
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translate([(num_strings-i-1)*string_spacing - neck_width/2 + string_margin,0,5]) rotate([-90,0,0]) translate([0,0,-string_excess/2]) cylinder(h=fsl_mm+string_excess, d=string_diameters_mm[i], $fn=cyl_ld_fn);
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}
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}
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// Debug markers to aid part slicing eyeballing
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for (i = [150:250:1000]) {
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%translate([50,i,0]) union() {text(str(i, "mm")); cube([50, 1, 1], center=true);}
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// %for (i = [150:250:1000]) {
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%for (i = [0:250:1000]) {
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translate([50,i,0]) union() {text(str(i, "mm")); cube([50, 1, 1], center=true);}
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}
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}
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@ -73,3 +73,73 @@ module CFSquareCutout(x1, x2, tolerance = CF_Square_Width_tolerance, taper_x1 =
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}
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}
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}
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module CFTubeCutout2(v, block_y0, block_y1, tolerance = CF_Tube_OD_tolerance, VLH = false, taper_length = 2, taper_mul = 1.1) {
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// Alternate approach: supply start vector v, and the bounding y values of the piece, taper on entry points only.
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tolerance = tolerance + (VLH ? 0.3 : 0);
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tube_y0 = v[1];
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tube_y1 = tube_y0 + CF_Tube_Len;
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OD = CF_Tube_OD + tolerance;
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taper_OD = (CF_Tube_OD*taper_mul) + tolerance;
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fn = 360;
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// Full cylinder, unconditional
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translate(v)
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rotate([-90,0,0]) cylinder(h=CF_Tube_Len, d=OD, $fn=fn);
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// Check for tapered holes
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if ((block_y0 >= tube_y0) && (block_y0 < tube_y1)) // Tube protrudes through start of block
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hull() {
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translate([v[0], block_y0, v[2]])
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rotate([-90,0,0]) cylinder(h=hull_epsilon, d=taper_OD, $fn=fn);
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translate([v[0], block_y0+taper_length, v[2]])
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rotate([-90,0,0]) cylinder(h=hull_epsilon, d=OD, $fn=fn);
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}
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if ((block_y1 <= tube_y1) && (block_y1 > tube_y0)) // Tube protrudes through end of block
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hull() {
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translate([v[0], block_y1-hull_epsilon, v[2]])
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rotate([-90,0,0]) cylinder(h=hull_epsilon, d=taper_OD, $fn=fn);
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translate([v[0], block_y1-hull_epsilon-taper_length, v[2]])
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rotate([-90,0,0]) cylinder(h=hull_epsilon, d=OD, $fn=fn);
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}
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}
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module CFSquareCutout2(v, block_y0, block_y1, tolerance = CF_Square_Width_tolerance, taper_length = 2, taper_mul = 1.1) {
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w = CF_Square_Width + tolerance;
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taper_w = (CF_Square_Width * taper_mul) + tolerance;
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tube_y0 = v[1];
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tube_y1 = tube_y0 + CF_Tube_Len;
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// Full square rod, unconditional
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translate([v[0]-w/2, v[1], v[2]-w/2]) cube([w, CF_Tube_Len, w]);
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// Check for tapered holes
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if ((block_y0 >= tube_y0) && (block_y0 < tube_y1)) // Tube protrudes through start of block
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hull() {
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translate([v[0], block_y0, v[2]])
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cube([taper_w, hull_epsilon*2, taper_w], center=true);
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translate([v[0], block_y0+taper_length, v[2]])
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cube([w, hull_epsilon*2, w], center=true);
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}
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if ((block_y1 <= tube_y1) && (block_y1 > tube_y0)) // Tube protrudes through end of block
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hull() {
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translate([v[0], block_y1-hull_epsilon, v[2]])
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cube([taper_w, hull_epsilon*2, taper_w], center=true);
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translate([v[0], block_y1-hull_epsilon-taper_length, v[2]])
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cube([w, hull_epsilon*2, w], center=true);
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}
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// if (taper_x1) {
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// hull() {
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// translate([0, x1, 0])
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// cube([w*taper_mul, hull_epsilon, w*taper_mul], center=true);
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// translate([0, x1+(taper_length*taper_direction), 0])
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// cube([w, hull_epsilon, w], center=true);
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// }
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// }
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// if (taper_x2){
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// hull() {
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// translate([0, x2, 0])
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// cube([w*taper_mul, hull_epsilon, w*taper_mul], center=true);
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// translate([0, x2-(taper_length*taper_direction), 0])
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// cube([w, hull_epsilon, w], center=true);
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// }
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// }
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}
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10
common.scad
10
common.scad
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@ -1,6 +1,7 @@
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Fender_Scale_mm = 648; // Actually 25.5inch = 647.7mm
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Classical_Normal_Scale_mm = 650; // about 25.59inch
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Classical_Short_Scale_mm = 635; // = 25inch
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Gibson_Scale_mm = 630; // 24.75inch = 628.65mm
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Guitar_Scale_Length_mm = Fender_Scale_mm;
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ln2 = ln(2);
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@ -10,6 +11,8 @@ 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 flatten(l) = [ for (a = l) for (b = a) b];
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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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@ -42,6 +45,13 @@ module round_cube(size, r) {
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}
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}
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module rotate_around(angles, pt) {
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translate(pt)
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rotate(angles)
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translate(-pt)
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children();
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}
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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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