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GNAL/50ft_v1/gnal_50ft.scad

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Add gnal 50ft v1 and required dependency files
2020-05-21 22:04:02 +00:00
include <./threads.scad>;
//https://www.thingiverse.com/thing:186660
include <./path_extrude.scad>;
$fn = 20;
H = 9.71;
REEL_H = 42;
REEL_D = 225.67 + .4;
REEL_OUTER_WALL_H = 7.5;
REEL_OUTER_WALL_W = 5.9;
REEL_INNER_D = 50;
REEL_INNER_H = 7.5;
REEL_INNER_WALL_W = 20;
REEL_MIDDLE_D = ((REEL_D - REEL_INNER_D) / 2) + REEL_INNER_D;
REEL_MIDDLE_WALL_H = 7.5;
REEL_MIDDLE_WALL_W = 3;
SPOKE_COUNT = 24;
OD = 10;
PITCH = 1.5;
THREAD = 1.6;
LEN = 21;
/**
* Frame which the bottom of the spiral reel is mounted to.
*/
module reel_frame () {
//outer wall
difference () {
cylinder(r = REEL_D / 2, h = REEL_OUTER_WALL_H, center = true);
cylinder(r = (REEL_D / 2) - REEL_OUTER_WALL_W, h = REEL_OUTER_WALL_H + 1, center = true);
}
difference () {
cylinder(r = REEL_MIDDLE_D / 2, h = REEL_MIDDLE_WALL_H, center = true);
cylinder(r = (REEL_MIDDLE_D / 2) - REEL_MIDDLE_WALL_W, h = REEL_MIDDLE_WALL_H + 1, center = true);
}
//inner wall
difference () {
cylinder(r = REEL_INNER_D / 2, h = REEL_INNER_H, center = true);
cylinder(r = (REEL_INNER_D / 2) - REEL_INNER_WALL_W, h = REEL_INNER_H + 1, center = true);
}
//standoff
B = 8.15;
D = 10.63;
OUTER = ((D * 2) + B) / 2;
INNER = B / 2;
translate ([0, 0, 4]) {
difference () {
cylinder(r = OUTER, h = 8, center = true);
cylinder(r = INNER, h = 8 + 1, center = true);
translate([0, 0, -8]) metric_thread (diameter=OD, pitch=PITCH, thread_size = THREAD, length=LEN);
}
translate([0, 13, 0]) rotate([0, 0, 45]) cube([8, 8, 8], center = true);
}
//spokes
spokes();
rotate([0, 0, 360 / (SPOKE_COUNT * 2)]) {
difference() {
spokes();
cylinder(r = REEL_MIDDLE_D / 2, h = REEL_MIDDLE_WALL_H + 1, center = true);
}
}
}
/**
* Spokes structure for the spiral reel frame
*/
module spokes () {
for (i = [0 : SPOKE_COUNT]) {
rotate([0, 0, i * (360 / SPOKE_COUNT)]) {
translate([0, (REEL_INNER_D / 2) + ((REEL_D - REEL_INNER_D) / 4) - 1, 0]) {
cube([3, (REEL_D - REEL_INNER_D) / 2, REEL_OUTER_WALL_H], center = true);
}
}
}
}
/**
* The bottom spiral
*/
module spiral_bottom_old () {
union () {
difference () {
translate([0, 0, (-(H - REEL_OUTER_WALL_H) / 2) - .05]) reel_frame();
}
rotate([0, 0, 270]) scale([-1, 1, 1]) spiral();
}
}
/**
* Only needed for 50ft model, not the current target ATM.
*/
module spiral_top_old () {
union () {
difference () {
translate([0, 0, (-(H - REEL_OUTER_WALL_H) / 2) - .05]) reel_frame();
}
rotate([0, 0, 270]) scale([-1, 1, 1]) spiral();
}
}
/**
* Render all spiral facets for as many rotations as supplied
Using new module
*/
module spiral (START_D = 50, SPIRALS = 39) {
//STOP_D = 100;
SPACING = 0.86;//1.34;
TOP_T = 0.86; //thickness
BOTTOM_T = 1.4;
START_R = START_D / 2;
union () {
for (i = [0 : $fn]) {
rotate ([0, 0, i * (360 / $fn)]) {
for (x = [0: (SPIRALS - 1)]) {
spiral_facet(i, x, START_R, SPACING, BOTTOM_T, TOP_T, H);
}
}
}
}
}
/**
* Generates a single face of the spiral, in this case a trapazoidal
* shape. Issues are (1) performance (maybe use of hull()) and (2) all
* facet lenths are the same, despite the diameter. This means that
* there are excessive numbers of facets for the smaller spirals to
* compensate for the number of facets needed for the outer spiral.
*/
module spiral_facet (i, x, START_R, SPACING, BOTTOM_T, TOP_T, H) {
STEP_SIZE = ((SPACING + BOTTOM_T) / $fn);
STEP_OFFSET = i * STEP_SIZE;
SPIRAL_START_OFFSET = (x * (SPACING + BOTTOM_T));
ACTUAL_R = START_R + SPIRAL_START_OFFSET + STEP_OFFSET;
L = 2 * (ACTUAL_R * tan((360 / $fn) / 2));
ANGLE = -atan( STEP_SIZE / (L / 2) ) / 2;
OFFSET = START_R - (BOTTOM_T / 2) + SPIRAL_START_OFFSET + STEP_OFFSET;
translate ([OFFSET, 0, - H / 2]) {
rotate ([0, 0, ANGLE]) {
//replace hull for quick render?
//test spiral lib
hull () {
translate([0, 0, H])
cube([TOP_T, L, 0.1], center=true);
cube([BOTTOM_T, L, 0.1], center=true);
}
}
}
}
/**
* Generates an arc with a diameter, width, height and total angle.
*/
module arc (D, W, H, ANGLE) {
R = D / 2;
difference () {
cylinder(r = R, h = H, center = true);
cylinder(r = R - W, h = H + 1, center = true);
if (ANGLE <= 90) {
translate([-R, -R, 0]) cube([D, D, H + 1], center=true);
translate([-R, R, 0]) cube([D, D, H + 1], center=true);
translate([R, -R, 0]) cube([D, D, H + 1], center=true);
rotate ([0, 0, ANGLE]) {
translate([R, R, 0]) {
cube([D, D, H + 1], center=true);
}
}
} else if (ANGLE <= 180) {
translate([-R, -R, 0]) cube([D, D, H + 1], center=true);
translate([R, -R, 0]) cube([D, D, H + 1], center=true);
rotate ([0, 0, ANGLE]) {
translate([R, R, 0]) {
cube([D, D, H + 1], center=true);
}
}
} else if (ANGLE <= 270) {
translate([R, -R, 0]) cube([D, D, H + 1], center=true);
rotate ([0, 0, ANGLE]) {
translate([R, R, 0]) {
cube([D, D, H + 1], center=true);
}
}
} else if (ANGLE <= 360) {
difference () {
union () {
difference () {
cylinder(r = R + 1, h = H + 1, center = true);
cylinder(r = R - W - 1, h = H + 2, center = true);
}
}
scale ([1, -1, 1]) {
translate([-R, -R, 0]) cube([D, D, H + 1], center=true);
translate([-R, R, 0]) cube([D, D, H + 1], center=true);
translate([R, -R, 0]) cube([D, D, H + 1], center=true);
rotate ([0, 0, 360 - ANGLE]) {
translate([R, R, 0]) {
cube([D, D, H + 1], center=true);
}
}
}
}
}
}
}
module film () {
//sample film
arc(REEL_D - 4, .5, 16, 100);
}
module spiral_top_old_debug (half = false, top = false) {
difference () {
translate([0, 0, 37]) rotate([180, 0, 180]) spiral_top_old();
if (half) {
rotate([0, 0, 80]) translate([50, 0, 0]) cube([100, 100, 100], center = true); //half
}
if (top) {
translate([0, 0, 60]) cube([100, 100, 100], center = true); //just top
}
}
}
module spiral_bottom_old_debug () {
difference () {
spiral_bottom_old();
rotate([0, 0, 80]) translate([50, 0, 0]) cube([100, 100, 100], center = true);
}
}
module exploded_view () {
spiral_bottom_old();
translate([0, 0, 37 + 15]) rotate([180, 0, 180]) spiral_top_old();
translate([0, 0, -10]) spiral_top_old_cap();
}
module spiral_test () {
//$fn = 100;
//spiral(START_D=34,SPIRALS=8);
translate([0, 0, (-(H - REEL_OUTER_WALL_H) / 2) - .05]) {
//difference () {
intersection() {
reel_frame();
cylinder(r = 35, h = H + 20, center = true);
}
//cylinder(r = 22, h = H, center = true);
//}
}
}
module spiral_bottom_core (thread = false) {
$fn = 360;
core_center_h = 3;
core_bottom_outer_d = 53;
core_bottom_outer_void_d = 44;
core_bottom_outer_h = 4.2;
core_d = 29.5;
core_h = 8.5;
core_bottom_d = 26;
core_bottom_h = 5;
top_z_offset = (core_h / 2) - (core_center_h / 2);
arms_outer_d = 48;
arms_inner_d = 48 - 7;
core_void_outer_d = 20.5;
core_void_inner_d = 14.5;
core_void_h = 11.5;
film_void = 0.8;
translate([0, 0, -(core_bottom_outer_h / 2) - (core_center_h / 2) ]) difference () {
cylinder(r = core_bottom_outer_d / 2, h = core_bottom_outer_h + core_center_h, center = true);
cylinder(r = core_bottom_outer_void_d / 2, h = core_bottom_outer_h + core_center_h + 1, center = true);
}
difference () {
union() {
//center
translate([0, 0, -core_center_h / 2]) {
difference () {
cylinder(r = (core_bottom_outer_d - 1) / 2, h = core_center_h, center = true);
rotate([0, 0, -120]) translate([20, 0, 0]) rotate([0, 0, 45]) cube([20, 20, 20], center = true);
}
translate([0, 0, -1]) cylinder(r = core_d / 2, h = core_center_h, center = true);
}
//top
translate([0, 0, top_z_offset]) {
cylinder(r = core_d / 2, h = core_h + core_center_h, center = true);
}
//bottom
translate([0, 0, -(core_bottom_h / 2) - (core_center_h / 2)]) {
cylinder(r = core_bottom_d / 2, h = core_bottom_h + core_center_h, center = true);
}
}
//thread
if (thread) {
translate([0, 0, -LEN / 2]) metric_thread (diameter=OD + .2, pitch=PITCH, thread_size = THREAD, length=LEN);
} else {
cylinder(r = (OD + 0.2) / 2, h = LEN, center = true);
}
translate([0, 0, -2.3]) difference () {
cylinder(r = core_void_outer_d / 2, h = core_void_h, center = true);
cylinder(r = core_void_inner_d / 2, h = core_void_h + 1, center = true);
}
}
//arms
difference () {
union () {
translate([0, 0, top_z_offset]) difference() {
//adjust one arm inward
intersection () {
cylinder(r = arms_outer_d / 2, h = core_h + core_center_h, center = true);
translate([1, 0, 0]) cylinder(r = arms_outer_d / 2, h = core_h + core_center_h, center = true);
}
intersection () {
cylinder(r = arms_inner_d / 2, h = core_h + core_center_h + 1, center = true);
translate([1, 0, 0]) cylinder(r = arms_inner_d / 2, h = core_h + core_center_h + 1, center = true);
}
translate([0, arms_outer_d / 2, 0]) cube([arms_outer_d, arms_outer_d, arms_outer_d], center = true);
}
translate([(arms_outer_d + arms_inner_d) / 4, 0, top_z_offset]) cylinder(r = 3.5 / 2, h = core_h + core_center_h, center = true, $fn = 40);
//adjusted arm
translate([-((arms_outer_d + arms_inner_d) / 4) + 1, 0, top_z_offset]) cylinder(r = 3.5 / 2, h = core_h + core_center_h, center = true, $fn = 40);
difference () {
rotate([0, 0, -120]) translate([13.75, 0, top_z_offset]) cube([16, 20, core_h + core_center_h], center = true);
//remove piece from adjusting arm
translate([-19, -14, 0]) rotate([0, 0, 10]) cube([4, 4, 30], center = true);
rotate([0, 0, -120 - 37]) translate([18, 0, top_z_offset]) {
cylinder(r = 6.8 / 2, h = 30, center = true);
translate([-4, -2, 0]) cube([4, 4, 30], center = true);
}
rotate([0, 0, -120 + 37]) translate([18, 0, top_z_offset]) {
cylinder(r = 6.8 / 2, h = 30, center = true);
translate([-4, 2, 0]) cube([4, 4, 30], center = true);
}
}
}
rotate([0, 0, -120]) translate([20, -5, 0]) rotate([0, 0, 45]) cube([20, film_void, 30], center = true);
rotate([0, 0, -120]) translate([20, 5, 0]) rotate([0, 0, -45]) cube([20, film_void, 30], center = true);
rotate([0, 0, -120]) translate([25, 0, 0]) difference () {
cylinder(r = 8 / 2, h = 30, center = true);
translate([-6.9, 0, 0]) cube([8, 8, 30], center = true);
}
cylinder(r = core_void_outer_d / 2, h = core_void_h, center = true);
rotate([0, 0, -120]) translate([20, 0, -1.5]) rotate([0, 0, 45]) cube([20, 20, 3.01], center = true);
}
}
module spiral_bottom (threads = false, spiral_count = 40) {
outer_d = 215;
outer_d_inside = 209;
outer_h = 7.5;
spoke_len = 81;
spoke_w = 3;
spoke_h = 4.2 + 3;
spoke_2_len = 43;
spoke_2_h = 6;
translate([0, 0, -3.75]) difference () {
cylinder(r = outer_d / 2, h = outer_h, center = true, $fn = 500);
cylinder(r = outer_d_inside / 2, h = outer_h + 1, center = true, $fn = 500);
}
//rounding voids
difference () {
spiral_bottom_core(threads);
for (i = [0 : SPOKE_COUNT]) {
rotate([0, 0, (i + 0.5) * (360 / SPOKE_COUNT)]) translate([0, 26.75, 0]) cylinder(r = 2, h = 20, center = true, $fn = 40);
}
}
for (i = [0 : SPOKE_COUNT]) {
rotate([0, 0, i * (360 / SPOKE_COUNT)]) translate([(spoke_len / 2) + (48 / 2), 0, -3.6]) cube([spoke_len, spoke_w, spoke_h], center = true);
}
for (i = [0 : SPOKE_COUNT]) {
rotate([0, 0, (i + 0.5) * (360 / SPOKE_COUNT)]) translate([(outer_d / 2) - (spoke_2_len / 2) - 2, 0, -3]) cube([spoke_2_len, spoke_w, spoke_2_h], center = true);
}
for (i = [0 : SPOKE_COUNT]) {
rotate([0, 0, (i + 0.5) * (360 / SPOKE_COUNT)]) translate([63, 0, -3]) rotate([0, 0, 20]) cube([ spoke_w, 18, spoke_2_h], center = true);
}
//translate([0, 0, 1]) rotate([0, 0, 0]) spiral_2 (START_D = 46.95, SPIRALS = spirals); //12 //40
translate([0, 0, -.1]) spirals(spiral_count, 46.95 - 1.2, 2.075);
}
module spiral_top_core () {
$fn = 360;
core_center_h = 3;
core_bottom_outer_d = 53;
core_bottom_outer_void_d = 44;
core_bottom_outer_h = 4.2;
core_d = 29.5;
core_h = 8.5;
core_bottom_d = 26;
core_bottom_h = 4.2;
top_z_offset = (core_h / 2) - (core_center_h / 2);
core_void_outer_d = 20.5;
core_void_inner_d = 14.5;
core_void_h = 11.5;
arms_outer_d = 48;
arms_inner_d = 48 - 7;
void_d = 18;
film_void = 0.8;
translate([0, 0, -(core_bottom_outer_h / 2) - (core_center_h / 2) ]) difference () {
cylinder(r = core_bottom_outer_d / 2, h = core_bottom_outer_h + core_center_h, center = true);
cylinder(r = core_bottom_outer_void_d / 2, h = core_bottom_outer_h + core_center_h + 1, center = true);
}
difference () {
union() {
//center
translate([0, 0, -core_center_h / 2]) {
difference () {
cylinder(r = (core_bottom_outer_d - 1) / 2, h = core_center_h, center = true);
rotate([0, 0, -120]) translate([20, 0, 0]) rotate([0, 0, 45]) cube([20, 20, 20], center = true);
}
translate([0, 0, -1]) cylinder(r = core_d / 2, h = core_center_h, center = true);
}
//top
translate([0, 0, top_z_offset]) {
cylinder(r = core_d / 2, h = core_h + core_center_h, center = true);
}
//bottom
translate([0, 0, -(core_bottom_h / 2) - (core_center_h / 2)]) {
cylinder(r = core_bottom_d / 2, h = core_bottom_h + core_center_h, center = true);
}
}
cylinder(r = void_d / 2, h = 30, center = true);
translate([0, 0, -12]) spacer_ridges();
}
//arms
difference () {
union () {
translate([0, 0, top_z_offset]) difference() {
//adjust the shorter arm
intersection () {
cylinder(r = arms_outer_d / 2, h = core_h + core_center_h, center = true);
translate([1, 0, 0]) cylinder(r = arms_outer_d / 2, h = core_h + core_center_h, center = true);
}
intersection () {
cylinder(r = arms_inner_d / 2, h = core_h + core_center_h + 1, center = true);
translate([1, 0, 0]) cylinder(r = arms_inner_d / 2, h = core_h + core_center_h + 1, center = true);
}
translate([0, arms_outer_d / 2, 0]) cube([arms_outer_d, arms_outer_d, arms_outer_d], center = true);
}
translate([(arms_outer_d + arms_inner_d) / 4, 0, top_z_offset]) cylinder(r = 3.5 / 2, h = core_h + core_center_h, center = true, $fn = 40);
//adjusted arm
translate([-((arms_outer_d + arms_inner_d) / 4) + 1, 0, top_z_offset]) cylinder(r = 3.5 / 2, h = core_h + core_center_h, center = true, $fn = 40);
difference () {
rotate([0, 0, -120]) translate([13.75, 0, top_z_offset]) cube([16, 20, core_h + core_center_h], center = true);
//remove piece from adjusting arm
translate([-19, -14, 0]) rotate([0, 0, 10]) cube([4, 4, 30], center = true);
rotate([0, 0, -120 - 37]) translate([18, 0, top_z_offset]) {
cylinder(r = 6.8 / 2, h = 30, center = true);
translate([-4, -2, 0]) cube([4, 4, 30], center = true);
}
rotate([0, 0, -120 + 37]) translate([18, 0, top_z_offset]) {
cylinder(r = 6.8 / 2, h = 30, center = true);
translate([-4, 2, 0]) cube([4, 4, 30], center = true);
}
}
}
rotate([0, 0, -120]) translate([20, -5, 0]) rotate([0, 0, 45]) cube([20, film_void, 30], center = true);
rotate([0, 0, -120]) translate([20, 5, 0]) rotate([0, 0, -45]) cube([20, film_void, 30], center = true);
rotate([0, 0, -120]) translate([25, 0, 0]) difference () {
cylinder(r = 8 / 2, h = 30, center = true);
translate([-6.9, 0, 0]) cube([8, 8, 30], center = true);
}
cylinder(r = core_void_outer_d / 2, h = core_void_h, center = true);
rotate([0, 0, -120]) translate([20, 0, -1.5]) rotate([0, 0, 45]) cube([20, 20, 3.01], center = true);
cylinder(r = void_d / 2, h = 30, center = true);
}
}
module spiral_top (spiral_count = 40) {
outer_d = 215;
outer_d_inside = 209;
outer_h = 7.5;
spoke_len = 81;
spoke_w = 3;
spoke_h = 4.2 + 3;
spoke_2_len = 43;
spoke_2_h = 6;
translate([0, 0, -3.75]) difference () {
cylinder(r = outer_d / 2, h = outer_h, center = true, $fn = 500);
cylinder(r = outer_d_inside / 2, h = outer_h + 1, center = true, $fn = 500);
}
difference () {
spiral_top_core();
for (i = [0 : SPOKE_COUNT]) {
rotate([0, 0, (i + 0.5) * (360 / SPOKE_COUNT)]) translate([0, 26.75, 0]) cylinder(r = 2, h = 20, center = true, $fn = 40);
}
}
for (i = [0 : SPOKE_COUNT]) {
rotate([0, 0, i * (360 / SPOKE_COUNT)]) translate([(spoke_len / 2) + (48 / 2), 0, -3.6]) cube([spoke_len, spoke_w, spoke_h], center = true);
}
for (i = [0 : SPOKE_COUNT]) {
rotate([0, 0, (i + 0.5) * (360 / SPOKE_COUNT)]) translate([(outer_d / 2) - (spoke_2_len / 2) - 2, 0, -3]) cube([spoke_2_len, spoke_w, spoke_2_h], center = true);
}
for (i = [0 : SPOKE_COUNT]) {
rotate([0, 0, (i + 0.5) * (360 / SPOKE_COUNT)]) translate([63, 0, -3]) rotate([0, 0, 20]) cube([ spoke_w, 18, spoke_2_h], center = true);
}
//translate([0, 0, 1]) rotate([0, 0, 0]) spiral_2 (START_D = 46.95, SPIRALS = spiral_count);//12 //40
translate([0, 0, -.1]) spirals(spiral_count, 46.95 - 1.2, 2.075);
}
module spacer_ridges () {
ridges = 16;
for (i = [0 : ridges]) {
rotate([0, 0, i * (360 / ridges)]) translate([13.5, 0, 0]) cylinder(r = 1.25, h = 8, $fn = 60);
}
}
module spacer_ridges_loose () {
ridges = 16;
intersection () {
union () {
for (i = [0 : ridges]) {
rotate([0, 0, i * (360 / ridges)]) translate([13.7, 0, 0]) cylinder(r = 1.25, h = 8, $fn = 60);
}
}
cylinder(r = 13.7, h = 12, center = true);
}
}
module spacer_outer_ridges () {
ridges = 24;
H = 6.5;
difference () {
union () {
for (i = [0 : ridges]) {
rotate([0, 0, i * (360 / ridges)]) translate([14.6, 0, -4.75]) cylinder(r = 1.25, h = 8, $fn = 30);
}
}
translate([0, 0, -4.1]) difference () {
cylinder(r = 33 / 2, h = 4, center = true, $fn = 100);
cylinder(r2 = 33 / 2, r1 = 27.75 / 2, h = 4.1, center = true, $fn = 100);
}
}
}
module spacer () {
add = 3.25;
core_d = 29.5;
core_bottom_d = 26.2 + .2;
void_d = 22.5;
h = 8 + add;
translate([0, 0, (add / 2) - 1]) difference () {
union () {
difference () {
cylinder(r = core_d / 2, h = h, center = true, $fn = 200);
translate([0, 0, 8]) cylinder(r = core_bottom_d / 2, h = h, center = true, $fn = 200);
cylinder(r = void_d / 2, h = h + 1, center = true, $fn = 200);
}
translate([0, 0, 0]) spacer_ridges_loose();
spacer_outer_ridges();
}
//trim top
translate([0, 0, h - 0.1]) cylinder(r = (core_d + 1) / 2, h = h, center = true, $fn = 200);
//trim bottom
translate([0, 0, -h + 0.9]) cylinder(r = (core_d + 1) / 2, h = h, center = true, $fn = 200);
//finger grips
//translate([0, 24, 0]) rotate([-6, 0, 0]) cylinder(r = 10, h = 6, center = true, $fn = 100);
//translate([0, -24, 0]) rotate([6, 0, 0]) cylinder(r = 10, h = 6, center = true, $fn = 100);
}
}
module top () {
H = 5;
center_d = 53;
spoke_w = 4.5;
spokes = 12;
outer_d = 215;
inner_d = 150;
void_d = 22.5;
hole_d = 3.5;
hole_spacing = 37;
core_d = 29.5;
core_bottom_d = 26.2;
difference () {
union () {
cylinder(r = center_d / 2, h = H, center = true, $fn = 100);
for (i = [0 : spokes]) {
rotate([0, 0, i * (360 / spokes)]) translate([0, outer_d / 4, 0]) cube([spoke_w, (outer_d / 2) - 1, H], center = true);
}
}
//void
cylinder(r = void_d / 2, h = H + 1, center = true, $fn = 100);
//speed holes
for (i = [0 : 3]) {
rotate([0, 0, (i * 90) + 45]) translate([0, hole_spacing / 2, 0]) cylinder(r = hole_d / 2, h = H + 1, center = true);
}
//rounding of center cylinder
for (i = [0 : spokes]) {
rotate([0, 0, (i + 0.5) * (360 / spokes)]) translate([-2.75, 26.5, 0]) cylinder(r = 2, h = H+1, center = true, $fn = 40);
rotate([0, 0, (i + 0.5) * (360 / spokes)]) translate([2.75, 26.5, 0]) cylinder(r = 2, h = H+1, center = true, $fn = 40);
rotate([0, 0, (i + 0.5) * (360 / spokes)]) translate([0, 26.5, 0]) cube([5, 4, H + 1], center = true);
}
}
difference () {
cylinder(r = (center_d / 2) - 1.8, h = H, center = true, $fn = 200);
cylinder(r = (hole_spacing / 2) + 2, h = H + 1, center = true, $fn = 200);
}
//outer ring
difference () {
cylinder(r = outer_d / 2, h = H, center = true, $fn = 200);
cylinder(r = (outer_d / 2) - 5, h = H + 1, center = true, $fn = 200);
}
//inner ring
difference () {
cylinder(r = inner_d / 2, h = H, center = true, $fn = 200);
cylinder(r = (inner_d / 2) - 5, h = H + 1, center = true, $fn = 200);
}
//rounded cross connectors
for (i = [0 : spokes]) {
rotate([0, 0, i * (360 / spokes)]) translate([0, (inner_d / 2) - (spoke_w / 2), 0]) difference() {
cylinder(r = 6.5, h = H, center = true);
translate([6.25, 6, 0]) cylinder(r = 4, h = H + 1, center = true, $fn = 60);
translate([-6.25, 6, 0]) cylinder(r = 4, h = H + 1, center = true, $fn = 60);
translate([-6.1, -7, 0]) cylinder(r = 4, h = H + 1, center = true, $fn = 60);
translate([6.1, -7, 0]) cylinder(r = 4, h = H + 1, center = true, $fn = 60);
}
}
difference () {
union () {
translate([0, 0, 3.75 + 1]) cylinder(r = core_d / 2, h = H, center = true, $fn = 60);
translate([0, 0, 3.75 + 1 + 3.2]) cylinder(r = core_bottom_d / 2, h = H, center = true, $fn = 60);
}
cylinder(r = void_d / 2, h = H * 5 , center = true, $fn = 100);
translate([0, 0, 4 + 1 + 2.25]) spacer_ridges();
}
//rounded outer ring connectors
for (i = [0 : spokes]) {
rotate([0, 0, i * (360 / spokes)]) translate([0, 205 / 2, 0]) difference () {
cube([13, 9, H], center = true);
translate([6.2, -4.2, 0]) cylinder(r = 4, h = H + 1, center = true, $fn = 60);
translate([-6.2, -4.2, 0]) cylinder(r = 4, h = H + 1, center = true, $fn = 60);
}
}
}
module spiral_facet_2 (i, SPIRAL, START_R = 48, SPACING = 2, FACET_SIZE = 1, FN = 360) {
BOTTOM_T = 1.2;
TOP_T = .3;
H = 2.1;
STEP_SIZE = SPACING / FN;
STEP_OFFSET = (SPIRAL * SPACING) + (i * STEP_SIZE);
ROT = i* (360 / FN);
ANGLE = 0;
OFFSET = START_R + STEP_OFFSET;
rotate([0, 0, ROT]) translate ([OFFSET, 0, - H / 2]) {
rotate ([0, 0, ANGLE]) {
hull () {
translate([0, 0, H])
cube([TOP_T, FACET_SIZE, 0.1], center=true);
cube([BOTTOM_T, FACET_SIZE, 0.1], center=true);
}
}
}
}
module spiral_2 (SPIRALS = 40, START_D = 48) {
SPACING = 2.075;
FACET_SIZE = 2;
for (SPIRAL = [0 : SPIRALS - 1]) {
//C = PI * R^2
C = PI * pow(( (START_D / 2) + (SPIRAL * SPACING) ) / 2, 2);
FN = ceil( C / FACET_SIZE );
for (i = [0 : FN - 1]) {
spiral_facet_2(i, SPIRAL, START_D / 2, SPACING, FACET_SIZE, FN);
}
}
}
module spirals (count = 40, start_d = 48, spacing = 2) {
facet_size = 30;
bottom = 1.2;
top = .3;
top_offset = (bottom - top);
h = 2.2;
od = start_d + (spacing * 2 * count);
echo("SPIRAL LENGTH", PI * count * (od + start_d + 1) / 2);
echo("OUTER D", od);
facetProfile = [[0, 0], [top_offset, -h], [bottom, -h], [bottom, 0]];
union () {
for (s = [0 : count - 1]) {
d = start_d + (s * spacing * 2);
c = PI * pow(d / 2, 2);
$fn = ceil( c / facet_size );
angle_i = 360 / $fn;
increment = spacing / $fn;
spiralPath = [ for(t = [0 : $fn + 1]) [((d / 2) + (t * increment)) * cos(t * angle_i), ((d / 2) + (t * increment)) * sin(t * angle_i), 0] ];
path_extrude(exShape=facetProfile, exPath=spiralPath);
}
}
}
module spirals_compressed (count = 40, start_d = 48, spacing = 2 ) {
facet_size = 30;
bottom = 1.2;
top = .3;
top_offset = (bottom - top);
h = 2.2;
facetProfile = [[0, 0], [top_offset, -h], [bottom, -h], [bottom, 0]];
spiralPath = [ for (s = [0 : count - 1]) for(t = [0 : ceil( (PI * pow((start_d + (s * spacing * 2)) / 2, 2)) / facet_size ) - 1]) [(((start_d + (s * spacing * 2)) / 2) + (t * (spacing / ceil( (PI * pow((start_d + (s * spacing * 2)) / 2, 2)) / facet_size )))) * cos(t * (360 / ceil( (PI * pow((start_d + (s * spacing * 2)) / 2, 2)) / facet_size ))), (((start_d + (s * spacing * 2)) / 2) + (t * (spacing / ceil( (PI * pow((start_d + (s * spacing * 2)) / 2, 2)) / facet_size )))) * sin(t * (360 / ceil( (PI * pow((start_d + (s * spacing * 2)) / 2, 2)) / facet_size ))), 0] ];
path_extrude(exShape=facetProfile, exPath=spiralPath);
}