mirror of
https://github.com/DJSundog/NopSCADlib.git
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Added ends
This commit is contained in:
Chris Palmer
parent
e38d9abfa0
commit
ff5e8c0372
@ -54,8 +54,8 @@ function drag_chain_outer_size(type) = //! Link outer dimensions
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[s.x + z, s.y + 4 * drag_chain_wall(type) + 2 * clearance, z];
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module drag_chain_link(type) {
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stl(str(drag_chain_name(type), "_drag_chain_link"));
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module drag_chain_link(type, start = false, end = false) {
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stl(str(drag_chain_name(type), "_drag_chain_link", start ? "_start" : end ? "_end" : ""));
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s = drag_chain_size(type);
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wall = drag_chain_wall(type);
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@ -64,11 +64,14 @@ module drag_chain_link(type) {
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os = drag_chain_outer_size(type);
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r = os.z / 2;
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pin_r = r / 2;
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inner_x = s.x - wall;
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roof_x = 2 * r - twall;
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floor_x = 2 * r;
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cam_r = inner_x - clearance - r;
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inner_x_normal = s.x - wall;
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inner_x = start ? 0 : s.x - inner_x_normal;
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roof_x_normal = 2 * r - twall;
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roof_x = start ? 0 : roof_x_normal;
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floor_x = start ? 0 : 2 * r;
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cam_r = inner_x_normal - clearance - r;
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cam_x = min(sqrt(max(sqr(cam_r) - sqr(r - twall), 0)), r);
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outer_end_x = end ? os.x : s.x - clearance;
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for(side = [-1, 1])
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rotate([90, 0, 0]) {
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@ -77,15 +80,20 @@ module drag_chain_link(type) {
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linear_extrude(wall, center = true)
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difference() {
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hull() {
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translate([r, r])
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rotate(180)
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teardrop(r = r, h = 0);
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if(start)
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translate([floor_x, 0])
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square([eps, os.z]);
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else
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translate([r, r])
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rotate(180)
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teardrop(r = r, h = 0);
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translate([s.x - clearance - eps, 0])
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translate([outer_end_x - eps, 0])
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square([eps, os.z]);
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}
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translate([r, r])
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horihole(pin_r, r);
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if(!start)
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translate([r, r])
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horihole(pin_r, r);
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}
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// Inner cheeks
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translate_z(side * (s.y / 2 + wall / 2))
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@ -93,52 +101,61 @@ module drag_chain_link(type) {
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difference() {
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union() {
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hull() {
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translate([s.x + r, r])
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rotate(180)
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teardrop(r = r, h = 0);
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if(!end) {
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translate([s.x + r, r])
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rotate(180)
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teardrop(r = r, h = 0);
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translate([s.x + r, twall])
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square([cam_x, eps]);
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translate([s.x + r, twall])
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square([cam_x, eps]);
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}
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else
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translate([s.x + 2 * r - eps, 0])
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square([eps, os.z]);
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translate([inner_x, 0])
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square([eps, os.z]);
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}
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}
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// Cutout for top wall
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intersection() {
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translate([s.x, 0])
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square([3 * r, twall]); // When straight
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if(!end)
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intersection() {
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translate([s.x, 0])
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square([3 * r, twall]); // When straight
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translate([s.x + r, r])
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rotate(-45)
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translate([-r + roof_x, -r - twall]) // When bent fully
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square(os.z);
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}
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translate([s.x + r, r])
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rotate(-45)
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translate([-r + roof_x_normal, -r - twall]) // When bent fully
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square(os.z);
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}
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}
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// Pin
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translate([s.x + r, r, side * (s.y / 2 + wall + clearance)])
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horicylinder(r = pin_r, z = r, h = 2 * wall);
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// Pin
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if(!end)
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translate([s.x + r, r, side * (s.y / 2 + wall + clearance)])
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horicylinder(r = pin_r, z = r, h = 2 * wall);
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// Cheek joint
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translate([inner_x, 0, side * (s.y / 2 + wall) - 0.5])
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cube([s.x - clearance - inner_x, os.z, 1]);
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// Cheek joint
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translate([inner_x, 0, side * (s.y / 2 + wall) - 0.5])
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cube([outer_end_x - inner_x, os.z, 1]);
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}
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// Roof
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translate([roof_x, -s.y / 2 - 0.5])
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cube([s.x + r - roof_x - twall - clearance, s.y + 1, twall]);
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// Roof, actually the floor when printed
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roof_end = end ? s.x + 2 * r : s.x + r - twall - clearance;
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translate([roof_x, -s.y / 2 - wall])
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cube([roof_end - roof_x , s.y + 2 * wall, twall]);
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translate([roof_x, -os.y / 2 + 0.5])
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cube([s.x - roof_x - clearance, os.y - 1, twall]);
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cube([s.x - clearance - roof_x, os.y - 1, twall]);
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// Base
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translate([floor_x, -s.y / 2 - 0.5, os.z - bwall])
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cube([s.x + r - floor_x, s.y + 1, bwall]);
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// Base, actually the roof when printed
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floor_end = end ? s.x + 2 * r : s.x + r;
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translate([floor_x, -s.y / 2 - wall, os.z - bwall])
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cube([floor_end - floor_x, s.y + 2 * wall, bwall]);
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translate([floor_x, -os.y / 2 + 0.5, os.z - bwall])
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cube([s.x - floor_x - clearance, os.y -1, bwall]);
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if(show_supports()) {
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if(show_supports() && !end) {
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for(side = [-1, 1]) {
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w = 2.1 * extrusion_width;
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translate([s.x + r + cam_x - w / 2, side * (s.y / 2 + wall / 2), twall / 2])
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@ -167,13 +184,7 @@ module drag_chain_assembly(type, pos = 0) { //! Drag chain assembly
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zb = z / 2; // z of bottom track
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c = [actual_travel / 2 + pos / 2, 0, r + zb]; // centre of bend
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module link(n) // Position and colour link with origin at the hinge hole
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translate([-z / 2, 0, -z / 2])
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stl_colour(n % 2 ? pp1_colour : pp2_colour)
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drag_chain_link(type);
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points = [ // Calculate lits of hinge points
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points = [ // Calculate list of hinge points
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for(i = 0, p = [0, 0, z / 2 + 2 * r]; i < links + 5;
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i = i + 1,
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dx = p.z > c.z ? s.x : -s.x,
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@ -183,10 +194,24 @@ module drag_chain_assembly(type, pos = 0) { //! Drag chain assembly
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: q) // Circular section
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p
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];
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npoints = len(points);
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assembly(str(drag_chain_name(type), "_drag_chain"))
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for(i = [0 : len(points) - 2]) let(v = points[i+1] - points[i])
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module link(n) // Position and colour link with origin at the hinge hole
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translate([-z / 2, 0, -z / 2])
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stl_colour(n % 2 ? pp1_colour : pp2_colour)
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drag_chain_link(type, start = n == -1, end = n == npoints - 1);
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assembly(str(drag_chain_name(type), "_drag_chain")) {
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for(i = [0 : npoints - 2]) let(v = points[i+1] - points[i])
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translate(points[i])
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rotate([0, -atan2(v.z, v.x), 0])
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link(i);
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translate(points[0] - [s.x, 0, 0])
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link(-1);
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translate(points[npoints - 1])
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hflip()
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link(npoints - 1);
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}
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}
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82
readme.md
82
readme.md
@ -28,20 +28,20 @@ See [usage](docs/usage.md) for requirements, installation instructions and a usa
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<tr><td> <a href = "#Bulldogs">Bulldogs</a> </td><td> <a href = "#Leadnuts">Leadnuts</a> </td><td> <a href = "#SK_brackets">SK_brackets</a> </td><td> <a href = "#Corner_block">Corner_block</a> </td><td> <a href = "#Gears">Gears</a> </td><td> <a href = "#Sphere">Sphere</a> </td></tr>
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<tr><td> <a href = "#Buttons">Buttons</a> </td><td> <a href = "#Light_strips">Light_strips</a> </td><td> <a href = "#SMDs">SMDs</a> </td><td> <a href = "#Door_hinge">Door_hinge</a> </td><td> <a href = "#Hanging_hole">Hanging_hole</a> </td><td> <a href = "#Teardrops">Teardrops</a> </td></tr>
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<tr><td> <a href = "#Cable_strips">Cable_strips</a> </td><td> <a href = "#Linear_bearings">Linear_bearings</a> </td><td> <a href = "#SSRs">SSRs</a> </td><td> <a href = "#Door_latch">Door_latch</a> </td><td> <a href = "#Horiholes">Horiholes</a> </td><td></td></tr>
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<tr><td> <a href = "#Cameras">Cameras</a> </td><td> <a href = "#Magnets">Magnets</a> </td><td> <a href = "#Screws">Screws</a> </td><td> <a href = "#Fan_guard">Fan_guard</a> </td><td> <a href = "#Layout">Layout</a> </td><td></td></tr>
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<tr><td> <a href = "#Circlips">Circlips</a> </td><td> <a href = "#Mains_sockets">Mains_sockets</a> </td><td> <a href = "#Sealing_strip">Sealing_strip</a> </td><td> <a href = "#Fixing_block">Fixing_block</a> </td><td> <a href = "#Maths">Maths</a> </td><td></td></tr>
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<tr><td> <a href = "#Components">Components</a> </td><td> <a href = "#Microswitches">Microswitches</a> </td><td> <a href = "#Shaft_couplings">Shaft_couplings</a> </td><td> <a href = "#Flat_hinge">Flat_hinge</a> </td><td> <a href = "#Offset">Offset</a> </td><td></td></tr>
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<tr><td> <a href = "#DIP">DIP</a> </td><td> <a href = "#Microview">Microview</a> </td><td> <a href = "#Sheets">Sheets</a> </td><td> <a href = "#Foot">Foot</a> </td><td> <a href = "#Quadrant">Quadrant</a> </td><td></td></tr>
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<tr><td> <a href = "#D_connectors">D_connectors</a> </td><td> <a href = "#Modules">Modules</a> </td><td> <a href = "#Spades">Spades</a> </td><td> <a href = "#Handle">Handle</a> </td><td> <a href = "#Round">Round</a> </td><td></td></tr>
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<tr><td> <a href = "#Displays">Displays</a> </td><td> <a href = "#Nuts">Nuts</a> </td><td> <a href = "#Spools">Spools</a> </td><td> <a href = "#PCB_mount">PCB_mount</a> </td><td> <a href = "#Rounded_cylinder">Rounded_cylinder</a> </td><td></td></tr>
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<tr><td> <a href = "#Extrusion_brackets">Extrusion_brackets</a> </td><td> <a href = "#O_ring">O_ring</a> </td><td> <a href = "#Springs">Springs</a> </td><td> <a href = "#PSU_shroud">PSU_shroud</a> </td><td> <a href = "#Rounded_polygon">Rounded_polygon</a> </td><td></td></tr>
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<tr><td> <a href = "#Extrusions">Extrusions</a> </td><td> <a href = "#Opengrab">Opengrab</a> </td><td> <a href = "#Stepper_motors">Stepper_motors</a> </td><td> <a href = "#Printed_box">Printed_box</a> </td><td> <a href = "#Sector">Sector</a> </td><td></td></tr>
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<tr><td> <a href = "#Fans">Fans</a> </td><td> <a href = "#PCB">PCB</a> </td><td> <a href = "#Swiss_clips">Swiss_clips</a> </td><td> <a href = "#Ribbon_clamp">Ribbon_clamp</a> </td><td> <a href = "#Sweep">Sweep</a> </td><td></td></tr>
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<tr><td> <a href = "#Fuseholder">Fuseholder</a> </td><td> <a href = "#PCBs">PCBs</a> </td><td> <a href = "#Toggles">Toggles</a> </td><td> <a href = "#SSR_shroud">SSR_shroud</a> </td><td> <a href = "#Thread">Thread</a> </td><td></td></tr>
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<tr><td> <a href = "#Geared_steppers">Geared_steppers</a> </td><td> <a href = "#PSUs">PSUs</a> </td><td> <a href = "#Transformers">Transformers</a> </td><td> <a href = "#Screw_knob">Screw_knob</a> </td><td> <a href = "#Tube">Tube</a> </td><td></td></tr>
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<tr><td> <a href = "#Green_terminals">Green_terminals</a> </td><td> <a href = "#Panel_meters">Panel_meters</a> </td><td> <a href = "#Tubings">Tubings</a> </td><td> <a href = "#Socket_box">Socket_box</a> </td><td></td><td></td></tr>
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<tr><td> <a href = "#Hot_ends">Hot_ends</a> </td><td> <a href = "#Pillars">Pillars</a> </td><td> <a href = "#Variacs">Variacs</a> </td><td> <a href = "#Strap_handle">Strap_handle</a> </td><td></td><td></td></tr>
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<tr><td> <a href = "#Hygrometer">Hygrometer</a> </td><td> <a href = "#Pin_headers">Pin_headers</a> </td><td> <a href = "#Veroboard">Veroboard</a> </td><td></td><td></td><td></td></tr>
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<tr><td> <a href = "#Cameras">Cameras</a> </td><td> <a href = "#Magnets">Magnets</a> </td><td> <a href = "#Screws">Screws</a> </td><td> <a href = "#Drag_chain">Drag_chain</a> </td><td> <a href = "#Layout">Layout</a> </td><td></td></tr>
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<tr><td> <a href = "#Circlips">Circlips</a> </td><td> <a href = "#Mains_sockets">Mains_sockets</a> </td><td> <a href = "#Sealing_strip">Sealing_strip</a> </td><td> <a href = "#Fan_guard">Fan_guard</a> </td><td> <a href = "#Maths">Maths</a> </td><td></td></tr>
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<tr><td> <a href = "#Components">Components</a> </td><td> <a href = "#Microswitches">Microswitches</a> </td><td> <a href = "#Shaft_couplings">Shaft_couplings</a> </td><td> <a href = "#Fixing_block">Fixing_block</a> </td><td> <a href = "#Offset">Offset</a> </td><td></td></tr>
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<tr><td> <a href = "#DIP">DIP</a> </td><td> <a href = "#Microview">Microview</a> </td><td> <a href = "#Sheets">Sheets</a> </td><td> <a href = "#Flat_hinge">Flat_hinge</a> </td><td> <a href = "#Quadrant">Quadrant</a> </td><td></td></tr>
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<tr><td> <a href = "#D_connectors">D_connectors</a> </td><td> <a href = "#Modules">Modules</a> </td><td> <a href = "#Spades">Spades</a> </td><td> <a href = "#Foot">Foot</a> </td><td> <a href = "#Round">Round</a> </td><td></td></tr>
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<tr><td> <a href = "#Displays">Displays</a> </td><td> <a href = "#Nuts">Nuts</a> </td><td> <a href = "#Spools">Spools</a> </td><td> <a href = "#Handle">Handle</a> </td><td> <a href = "#Rounded_cylinder">Rounded_cylinder</a> </td><td></td></tr>
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<tr><td> <a href = "#Extrusion_brackets">Extrusion_brackets</a> </td><td> <a href = "#O_ring">O_ring</a> </td><td> <a href = "#Springs">Springs</a> </td><td> <a href = "#PCB_mount">PCB_mount</a> </td><td> <a href = "#Rounded_polygon">Rounded_polygon</a> </td><td></td></tr>
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<tr><td> <a href = "#Extrusions">Extrusions</a> </td><td> <a href = "#Opengrab">Opengrab</a> </td><td> <a href = "#Stepper_motors">Stepper_motors</a> </td><td> <a href = "#PSU_shroud">PSU_shroud</a> </td><td> <a href = "#Sector">Sector</a> </td><td></td></tr>
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<tr><td> <a href = "#Fans">Fans</a> </td><td> <a href = "#PCB">PCB</a> </td><td> <a href = "#Swiss_clips">Swiss_clips</a> </td><td> <a href = "#Printed_box">Printed_box</a> </td><td> <a href = "#Sweep">Sweep</a> </td><td></td></tr>
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<tr><td> <a href = "#Fuseholder">Fuseholder</a> </td><td> <a href = "#PCBs">PCBs</a> </td><td> <a href = "#Toggles">Toggles</a> </td><td> <a href = "#Ribbon_clamp">Ribbon_clamp</a> </td><td> <a href = "#Thread">Thread</a> </td><td></td></tr>
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<tr><td> <a href = "#Geared_steppers">Geared_steppers</a> </td><td> <a href = "#PSUs">PSUs</a> </td><td> <a href = "#Transformers">Transformers</a> </td><td> <a href = "#SSR_shroud">SSR_shroud</a> </td><td> <a href = "#Tube">Tube</a> </td><td></td></tr>
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<tr><td> <a href = "#Green_terminals">Green_terminals</a> </td><td> <a href = "#Panel_meters">Panel_meters</a> </td><td> <a href = "#Tubings">Tubings</a> </td><td> <a href = "#Screw_knob">Screw_knob</a> </td><td></td><td></td></tr>
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<tr><td> <a href = "#Hot_ends">Hot_ends</a> </td><td> <a href = "#Pillars">Pillars</a> </td><td> <a href = "#Variacs">Variacs</a> </td><td> <a href = "#Socket_box">Socket_box</a> </td><td></td><td></td></tr>
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<tr><td> <a href = "#Hygrometer">Hygrometer</a> </td><td> <a href = "#Pin_headers">Pin_headers</a> </td><td> <a href = "#Veroboard">Veroboard</a> </td><td> <a href = "#Strap_handle">Strap_handle</a> </td><td></td><td></td></tr>
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<tr><td> <a href = "#IECs">IECs</a> </td><td> <a href = "#Pulleys">Pulleys</a> </td><td> <a href = "#Washers">Washers</a> </td><td></td><td></td><td></td></tr>
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<tr><td> <a href = "#Inserts">Inserts</a> </td><td></td><td> <a href = "#Wire">Wire</a> </td><td></td><td></td><td></td></tr>
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<tr><td></td><td></td><td> <a href = "#Zipties">Zipties</a> </td><td></td><td></td><td></td></tr>
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@ -4539,6 +4539,60 @@ Door latch for 6mm acrylic door for 3D printer. See [door_hinge](#door_hinge).
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| 1 | door_latch.stl |
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<a href="#top">Top</a>
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---
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<a name="Drag_chain"></a>
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## Drag_chain
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Parametric cable drag chain to limit the bend radius of a cable run.
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Each link has a maximum bend angle, so the mininium radius is proportional to the link length.
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The travel prpoery is how far it can move in each direction, i.e. half the maximum travel if the chain is mounted in the middle of the travel.
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[printed/drag_chain.scad](printed/drag_chain.scad) Implementation.
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[tests/drag_chain.scad](tests/drag_chain.scad) Code for this example.
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### Properties
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| Function | Description |
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|:--- |:--- |
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| ```drag_chain_bwall(type)``` | Bottom wall |
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| ```drag_chain_name(type)``` | The name to allow more than one in a project |
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| ```drag_chain_size(type)``` | The internal size and link length |
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| ```drag_chain_travel(type)``` | X travel |
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| ```drag_chain_twall(type)``` | Top wall |
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| ```drag_chain_wall(type)``` | Side wall thickness |
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### Functions
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| Function | Description |
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|:--- |:--- |
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| ```drag_chain(name, size, travel, wall = 1.6, bwall = 1.5, twall = 1.5)``` | Constructor |
|
||||
| ```drag_chain_outer_size(type)``` | Link outer dimensions |
|
||||
| ```drag_chain_radius(type)``` | The bend radius at the pivot centres |
|
||||
| ```drag_chain_z(type)``` | Outside dimension of a 180 bend |
|
||||
|
||||
### Modules
|
||||
| Module | Description |
|
||||
|:--- |:--- |
|
||||
| ```drag_chain_assembly(type, pos = 0)``` | Drag chain assembly |
|
||||
|
||||
|
||||
|
||||
### Printed
|
||||
| Qty | Filename |
|
||||
| ---:|:--- |
|
||||
| 14 | x_drag_chain_link.stl |
|
||||
| 1 | x_drag_chain_link_end.stl |
|
||||
| 1 | x_drag_chain_link_start.stl |
|
||||
|
||||
### Assemblies
|
||||
| Qty | Name |
|
||||
| ---:|:--- |
|
||||
| 1 | x_drag_chain_assembly |
|
||||
|
||||
|
||||
<a href="#top">Top</a>
|
||||
|
||||
---
|
||||
|
||||
@ -48,5 +48,12 @@ module drag_chains()
|
||||
|
||||
if($preview)
|
||||
drag_chains();
|
||||
else
|
||||
else {
|
||||
drag_chain_link(drag_chain);
|
||||
|
||||
translate([-x * 2, 0])
|
||||
drag_chain_link(drag_chain, start = true);
|
||||
|
||||
translate([x * 2, 0])
|
||||
drag_chain_link(drag_chain, end = true);
|
||||
}
|
||||
|
||||
BIN
tests/png/drag_chain.png
Normal file
BIN
tests/png/drag_chain.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 128 KiB |
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Reference in New Issue
Block a user