PETG Classical guitar neck 1alpha

CFTubes.scad

@@ -343,35 +343,61 @@ module bridge(string_spacing=18, string_margin=4.5, num_strings=3, target_neck_t
 
 module Nylon6String() {
 	fsl_mm = fret_scale_length(0);
-	echo(str("Making a Nylon 6 String with scale length ", fsl_mm, "mm = ", fsl_mm/25.4, "in"))
+
-	assert(fsl_mm == Classical_Short_Scale_mm);  // Make sure the function correctly uses our changed global
+	string_diameters_thous = [28, 32, 40, 30, 36, 42];
+	string_diameters_mm = string_diameters_thous * 0.0254;
 
 	num_frets = 20;
 	num_strings = 6;
 	// 56mm wide neck
 	string_spacing = 10;  // 50mm E to e
 	string_margin = 3;  // +6
+	neck_width = string_spacing*(num_strings-1) + string_margin*2;
 	scallop_depth = 2.5;
 	target_neck_thickness = 22;
 	fret_width=2.4;
 
+	echo(str("Making a Nylon 6 String with scale length ", fsl_mm, "mm = ", fsl_mm/25.4, "in and neck width ", neck_width, "mm"));
+	assert(fsl_mm == Classical_Short_Scale_mm);  // Make sure the function correctly uses our changed global
+
+	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]];
+	module CF_Span(full_length = 700, ply = 3, hole = true) {
+		for (v = CF_Span_Coords(full_length, ply))
+			translate(v) CFSquare(hole=hole);
+	}
+
+	reinforcing_tube_positions = flatten([
+		[
+			for (i=[-1,1]) each [
+				// Headside reinforcement
+				[i*21, -40+280, -4],
+				[i*17, -40+280, -12],
+				// Bridgeside reinforcement
+				[i*16, -40, -7],
+			]
+		],
+		[
+			// Bridgeside reinforcement
+			[0, -40, -4],
+			[0, -40, -15],
+		]]);
+	echo(reinforcing_tube_positions);
+	// Through span construction
+	span_coords = CF_Span_Coords();
+	reinforcing_square_positions = [
+		for (i=[-1,1]) each [ for (v = span_coords) [i*10, -40, -16] + v ]
+	];
+	echo(reinforcing_square_positions);
+
 
 	// neck(num_frets=num_frets, num_strings=num_strings, string_margin=string_margin, string_spacing=string_spacing);
-	module CF_Span(full_length = 700, ply = 3, hole = true) {
-		for (i=[0:ply-1])
-			translate([0, lerp(0, full_length-CF_Tube_Len, i/(ply-1)), CF_Square_Width*i]) CFSquare(hole=hole);
-	}
-	// for (m=[0,11]) mirror([m, 0, 0]) color([0.4, 0.5, 0.5]) translate([9, -40, -16]) CF_Span();
-	// CFTube();
 	// %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);
-	module NeckFragment(from_fret, to_fret, to_origin=true, include_from_fret=false) {
+	module NeckFragment(from_fret, to_fret, to_origin=true, include_from_fret=false, test_tolerances_piece=false) {
 		x0 = fret_scale_length(to_fret) - fret_width/2;
 		x1 = fret_scale_length(from_fret) + ((include_from_fret)?1:(-1)) * fret_width/2;
 		xn = fsl_mm + fret_width;
-		translate([0,to_origin ? -x0 : 0,0]) render() difference() {
+
-			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);
+		module TestTolerancesPiece() {
-			translate([-100, 0, -100]) cube([200, x0, 200]);
-			translate([-100, x1, -100]) cube([200, xn-x1, 200]);
 			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);
 			translate([ 12,0,-14]) CFSquareCutout(x0, x1, taper_length=2);
 			translate([ 12-CF_Square_Width,0,-14]) CFSquareCutout(x0, x1-8, taper_length=2, taper_x2=false);
@@ -379,22 +405,57 @@ module Nylon6String() {
 			translate([-12+CF_Square_Width,0,-14]) CFSquareCutout(x0+8, x1, taper_length=2, taper_x1=false);
 			translate([20,0,-6]) CFTubeCutout(x0, x1, taper_length=2);
 		}
-	}
+
-	difference(){
+		translate([0,to_origin ? -x0 : 0,0]) render() difference() {
-		NeckFragment(2, 3);
+			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);
-		translate([-20,0,-1]) rotate([-90,180,180]) linear_extrude(3, center=true) text("PETG", size=3.5, halign="center", valign="center");
+			translate([-100, 0, -100]) cube([200, x0, 200]);
-		translate([-20,0,-6]) rotate([-90,180,180]) linear_extrude(3, center=true) text("1α", size=3.5, halign="center", valign="center");
+			translate([-100, x1, -100]) cube([200, xn-x1, 200]);
+			for (v = reinforcing_tube_positions) CFTubeCutout2(v, x0, x1);
+			for (v = reinforcing_square_positions) CFSquareCutout2(v, x0, x1);
+			if (test_tolerances_piece) TestTolerancesPiece();
+		}
 	}
 
-	// translate([0,0,30]) difference() {
+	// Test tolerances piece
-	// 	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);
+	module TestTolerancesPiece() {
-	// 	for (m=[0,11]) mirror([m, 0, 0]) color([0.4, 0.5, 0.5]) translate([9, -40, -16]) CF_Span(hole=false);
+		difference(){
-	// }
+			NeckFragment(2, 3, test_tolerances_piece=true);
+			translate([-20,0,-1]) rotate([-90,180,180]) linear_extrude(3, center=true) text("PETG", size=3.5, halign="center", valign="center");
+			translate([-20,0,-6]) rotate([-90,180,180]) linear_extrude(3, center=true) text("1α", size=3.5, halign="center", valign="center");
+		}
+	}
+	// TestTolerancesPiece();
 
-	// for (m=[0,11]) mirror([m, 0, 0]) translate([29,10,-32]) rotate([0,-90,0]) NylonTuner();
+	module RealPiece(from_fret, to_fret, include_from_fret=false) {
+		midpoint = (fret_scale_length(from_fret) - fret_scale_length(to_fret) + (include_from_fret ? fret_width : 0))/2;
+		render() difference(){
+			NeckFragment(from_fret, to_fret, include_from_fret=include_from_fret);
+			color("red") for (ra = [[0,0,0], [0,0,180]]) rotate_around(ra, [0,midpoint,0])
+				translate([0,0,-9]) rotate([-90,180,180]) linear_extrude(3, center=true) text("PETG1α", size=2.5, halign="center", valign="center");
+		}
+	}
+	RealPiece(0, 8, include_from_fret=true);
+	%translate([100, 0, 0]) RealPiece(8, 21);
+
+	%translate([-100,0,0]) union() {
+		c_cf = [0.4, 0.5, 0.5];
+		%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);
+		// CF square stacks
+		for (v = reinforcing_tube_positions) color(c_cf) translate(v) CFTube();
+		for (v = reinforcing_square_positions) color(c_cf) translate(v) CFSquare();
+		// Approximate tuner placement
+		for (m=[0,1]) mirror([m, 0, 0]) translate([29,10,-32]) rotate([0,-90,0]) NylonTuner();
+
+		// Render strings above for spacing reference
+		string_excess = 80;
+		for (i = [0:num_strings-1]) {
+			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);
+		}
+	}
 	// Debug markers to aid part slicing eyeballing
-	for (i = [150:250:1000]) {
+	// %for (i = [150:250:1000]) {
-		%translate([50,i,0]) union() {text(str(i, "mm")); cube([50, 1, 1], center=true);}
+	%for (i = [0:250:1000]) {
+		translate([50,i,0]) union() {text(str(i, "mm")); cube([50, 1, 1], center=true);}
 	}
 }
 

CFTubes/common.scad

@@ -73,3 +73,73 @@ module CFSquareCutout(x1, x2, tolerance = CF_Square_Width_tolerance, taper_x1 =
 		}
 	}
 }
+
+module CFTubeCutout2(v, block_y0, block_y1, tolerance = CF_Tube_OD_tolerance, VLH = false, taper_length = 2, taper_mul = 1.1) {
+	// Alternate approach: supply start vector v, and the bounding y values of the piece, taper on entry points only.
+	tolerance = tolerance + (VLH ? 0.3 : 0);
+	tube_y0 = v[1];
+	tube_y1 = tube_y0 + CF_Tube_Len;
+	OD = CF_Tube_OD + tolerance;
+	taper_OD = (CF_Tube_OD*taper_mul) + tolerance;
+
+	fn = 360;
+	// Full cylinder, unconditional
+	translate(v)
+		rotate([-90,0,0]) cylinder(h=CF_Tube_Len, d=OD, $fn=fn);
+	// Check for tapered holes
+	if ((block_y0 >= tube_y0) && (block_y0 < tube_y1))  // Tube protrudes through start of block
+		hull() {
+			translate([v[0], block_y0, v[2]])
+				rotate([-90,0,0]) cylinder(h=hull_epsilon, d=taper_OD, $fn=fn);
+			translate([v[0], block_y0+taper_length, v[2]])
+				rotate([-90,0,0]) cylinder(h=hull_epsilon, d=OD, $fn=fn);
+		}
+	if ((block_y1 <= tube_y1) && (block_y1 > tube_y0))  // Tube protrudes through end of block
+		hull() {
+			translate([v[0], block_y1-hull_epsilon, v[2]])
+				rotate([-90,0,0]) cylinder(h=hull_epsilon, d=taper_OD, $fn=fn);
+			translate([v[0], block_y1-hull_epsilon-taper_length, v[2]])
+				rotate([-90,0,0]) cylinder(h=hull_epsilon, d=OD, $fn=fn);
+		}
+}
+
+module CFSquareCutout2(v, block_y0, block_y1, tolerance = CF_Square_Width_tolerance, taper_length = 2, taper_mul = 1.1) {
+	w = CF_Square_Width + tolerance;
+	taper_w = (CF_Square_Width * taper_mul) + tolerance;
+	tube_y0 = v[1];
+	tube_y1 = tube_y0 + CF_Tube_Len;
+
+	// Full square rod, unconditional
+	translate([v[0]-w/2, v[1], v[2]-w/2]) cube([w, CF_Tube_Len, w]);
+	// Check for tapered holes
+	if ((block_y0 >= tube_y0) && (block_y0 < tube_y1))  // Tube protrudes through start of block
+		hull() {
+			translate([v[0], block_y0, v[2]])
+				cube([taper_w, hull_epsilon*2, taper_w], center=true);
+			translate([v[0], block_y0+taper_length, v[2]])
+				cube([w, hull_epsilon*2, w], center=true);
+		}
+	if ((block_y1 <= tube_y1) && (block_y1 > tube_y0))  // Tube protrudes through end of block
+		hull() {
+			translate([v[0], block_y1-hull_epsilon, v[2]])
+				cube([taper_w, hull_epsilon*2, taper_w], center=true);
+			translate([v[0], block_y1-hull_epsilon-taper_length, v[2]])
+				cube([w, hull_epsilon*2, w], center=true);
+		}
+	// if (taper_x1) {
+	// 	hull() {
+	// 		translate([0, x1, 0])
+	// 			cube([w*taper_mul, hull_epsilon, w*taper_mul], center=true);
+	// 		translate([0, x1+(taper_length*taper_direction), 0])
+	// 			cube([w, hull_epsilon, w], center=true);
+	// 	}
+	// }
+	// if (taper_x2){
+	// 	hull() {
+	// 		translate([0, x2, 0])
+	// 			cube([w*taper_mul, hull_epsilon, w*taper_mul], center=true);
+	// 		translate([0, x2-(taper_length*taper_direction), 0])
+	// 			cube([w, hull_epsilon, w], center=true);
+	// 	}
+	// }
+}

common.scad

@@ -1,6 +1,7 @@
 Fender_Scale_mm = 648;  // Actually 25.5inch = 647.7mm
 Classical_Normal_Scale_mm = 650;  // about 25.59inch
 Classical_Short_Scale_mm = 635;  // = 25inch
+Gibson_Scale_mm = 630;  // 24.75inch = 628.65mm
 
 Guitar_Scale_Length_mm = Fender_Scale_mm;
 ln2 = ln(2);
@@ -10,6 +11,8 @@ function mm_to_fret_number(mm) = -log2(mm/Guitar_Scale_Length_mm)*12;
 function lerp(start, end, amount) = start + (end-start)*amount;
 function clamp(minimum, value, maximum) = min(max(minimum, value), maximum);
 
+function flatten(l) = [ for (a = l) for (b = a) b];
+
 function tri_circumcenter(pts) =
 	let(
 		v0 = pts[1] - pts[0],
@@ -42,6 +45,13 @@ module round_cube(size, r) {
 	}
 }
 
+module rotate_around(angles, pt) {
+	translate(pt)
+		rotate(angles)
+			translate(-pt)
+				children();
+}
+
 // 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.
 JP_Serif_Font = "New Tegomin";
 JP_Sans_Font = "Yuji Boku";