Improve modularity of cartridge
This commit is contained in:
parent
d558404c75
commit
561427774a
1 changed files with 252 additions and 94 deletions
358
cartridge.scad
358
cartridge.scad
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@ -1,123 +1,281 @@
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$fn = $preview ? 32 : 64;
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$fn = $preview ? 32 : 128;
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*rotate([0, -90, -90]) import("/home/nettika/Downloads/8_Track.STL");
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// Cartridge base dimensions
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*translate([0, 98.6, 21.8]) rotate([-90, 0, -90]) import("/home/nettika/Downloads/Track_Lid.STL");
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cartridge_length = 133;
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cartridge_width = 102;
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cartridge_width = 102;
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cartridge_length = 133;
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cartridge_height = 21;
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cartridge_height = 21;
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wedge_width = 6;
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wedge_depth = 16;
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// Tape guide dimensions
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track_inset = 6;
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tape_guide_width = 6;
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foot_inset = 8;
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tape_guide_depth = 16;
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tape_guide_slope = tape_guide_width / tape_guide_depth;
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// Track dimensions
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track_front_inset = 8;
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track_back_inset = 4;
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track_side_inset = 6;
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track_radius = 1;
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track_taper_length = 12;
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// Foot dimensions
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foot_width = 2.5;
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foot_height = 1;
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foot_front_inset = 8;
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foot_back_inset = 4;
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foot_side_inset = 6;
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// Fillets
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back_vertical_fillet_radius = 4;
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side_vertical_fillet_radius = 16;
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front_vertical_fillet_radius = 5;
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horizontal_fillets_radius = 1;
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// Windows on front wall
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window_vertical_inset = 2;
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window_side_inset = 14;
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window_depth = 6; // 13
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left_window_width = 20;
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right_window_width = 20;
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window_gap = 5;
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roller_window_depth = 8;
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roller_window_offset = 3.5;
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// Emulated gap between top and bottom half
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gap_height = 1;
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gap_height = 1;
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gap_depth = 0.3;
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gap_depth = 0.3;
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gap_elevation = 9;
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gap_elevation = 14;
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module base_body() {
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// Grips
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minkowski() {
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grip_wedge_width = 2.5;
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translate([0, 0, 1]) linear_extrude(cartridge_height - 2) offset(-1) footprint();
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grip_count = 5;
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sphere(1);
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}
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translate([wedge_depth-8, 0, cartridge_height]) {
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translate([0, track_inset]) track(cartridge_length-wedge_depth+4);
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translate([0, cartridge_width-track_inset]) track(cartridge_length-wedge_depth+4);
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}
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translate([wedge_depth, foot_inset, -0.5]) foot();
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translate([wedge_depth, cartridge_width-foot_inset, -0.5]) foot();
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}
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module track(l, r=1, taper=12) rotate([0, 90, 0]) {
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// Tape
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cylinder(r1=0, r2=r, h=taper);
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roller_inset = 0;
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translate([0, 0, taper]) cylinder(r=r, h=l-2*taper);
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roller_radius = 0;
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translate([0, 0, l-taper]) cylinder(r1=r, r2=0, h=taper);
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roller_position = [12, 79.5];
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}
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tape_line_position = [2, 14];
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tape_height = 6.4;
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module foot(w=2.5) {
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// NFC Coin
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cube([cartridge_length-wedge_depth-2, w, 2]);
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nfc_coin_depth = 1;
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translate([cartridge_length-wedge_depth-2, w, 1]) rotate([90, 90]) cylinder(r=1, h=w);
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nfc_coin_diameter = 25;
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translate([0, w, 1]) rotate([90, 90]) cylinder(r=1, h=w);
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nfc_coin_tolerance = 0.1;
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}
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color("salmon")
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cartridge();
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difference() {
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base_body();
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module cartridge() {
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let(inset=2, d=6/*13*/) {
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translate([0, 0, inset]) {
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translate([0, 14]) cube([d, 20, cartridge_height-inset*2]);
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translate([0, 40]) cube([d, 22, cartridge_height-inset*2]);
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}
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}
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translate([0, 0, gap_elevation-(gap_height/2)])
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linear_extrude(cartridge_height-gap_elevation+gap_height) {
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for(i=[0:2.5:12.5]) {
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polygon([
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[cartridge_length-5-i, 0],
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[cartridge_length-5-i, 1+gap_depth],
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[cartridge_length-7.5-i, gap_depth],
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[cartridge_length-7.5-i, 0]
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]);
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polygon([
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[cartridge_length-5-i, cartridge_width],
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[cartridge_length-5-i, cartridge_width-1-gap_depth],
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[cartridge_length-7.5-i, cartridge_width-gap_depth],
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[cartridge_length-7.5-i, cartridge_width]
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]);
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}
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}
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translate([0, 0, gap_elevation-(gap_height/2)]) linear_extrude(gap_height) {
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difference() {
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difference() {
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offset(10) footprint();
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base();
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offset(-gap_depth) footprint();
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windows();
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grips();
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gap();
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undercut();
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nfc_coin();
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}
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}
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}
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tape();
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translate([0, 0, -gap_height/2 - 2]) linear_extrude(gap_elevation+2) translate([53, cartridge_width-7]) rotate(45) offset(3) square([16, 16]);
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}
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}
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color("teal")
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module base() {
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let(h=6.4) {
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translate([0, 0, horizontal_fillets_radius]) minkowski() {
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translate([12, 79.5, (cartridge_height-h)/2]) cylinder(r=10, h);
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linear_extrude(cartridge_height - 2 * horizontal_fillets_radius)
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translate([2, 14, (cartridge_height-h)/2]) cube([10, 65.5, h]);
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offset(-horizontal_fillets_radius)
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footprint();
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sphere(horizontal_fillets_radius);
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}
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tracks();
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feet();
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}
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}
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module footprint() {
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module windows() {
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difference() {
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rectangular_windows();
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polygon([
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roller_window();
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[0, wedge_width],
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}
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[0, cartridge_width - wedge_width],
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[wedge_depth, cartridge_width],
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module rectangular_windows() {
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[cartridge_length, cartridge_width],
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translate([
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[cartridge_length, 0],
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0,
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[wedge_depth, 0],
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window_side_inset,
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]);
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window_vertical_inset
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let(r=4) {
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]) {
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translate([cartridge_length - r, 0]) {
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window_height = cartridge_height - 2 * window_vertical_inset;
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translate([0, r]) fillet(r, a1=90, a2=180);
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cube([window_depth, left_window_width, window_height]);
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translate([0, cartridge_width - r]) fillet(r, a1=0, a2=90);
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translate([
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}
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0,
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}
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left_window_width + window_gap,
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let(m=wedge_width/wedge_depth, r=20) {
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])
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translate([wedge_depth + r * tan(atan(m)/2), 0]) {
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cube([window_depth, right_window_width, window_height]);
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translate([0, r]) fillet(r, a1=180, a2=180+atan(m));
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translate([0, cartridge_width - r]) fillet(r, a1=0, a2=-atan(m));
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}
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}
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let(m=wedge_depth/wedge_width, r=5) {
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translate([r, 0]) {
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translate([0, wedge_width + r * tan(atan(m)/2)]) fillet(r, a1=180+atan(1/m), a2=270);
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translate([0, cartridge_width - wedge_width - r * tan(atan(m)/2)]) fillet(r, a1=270, a2=360-atan(1/m));
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}
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}
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translate([-8, 76]) circle(r=12);
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}
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}
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}
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}
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module fillet(r, d, a1=0, a2=360, p=10) {
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module roller_window() {
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difference() {
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translate([
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-roller_window_depth,
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roller_position.y - roller_window_offset,
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])
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cylinder(h=cartridge_height, r=12);
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}
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module grips() {
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for(i=[0:grip_count-1]) {
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translate([cartridge_length - i * grip_wedge_width - back_vertical_fillet_radius, 0]) {
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grip_wedge();
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translate([0, cartridge_width]) mirror([0, 1]) grip_wedge();
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}
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}
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}
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module grip_wedge() {
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linear_extrude(gap_elevation)
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polygon([
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polygon([
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[0, 0],
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[0, 0],
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each [for (a=[a1:a2]) [p * sin(a) * r, p * cos(a) * r]],
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[0, 1 + gap_depth],
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[-grip_wedge_width, gap_depth],
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[-grip_wedge_width, 0]
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]);
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]);
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circle(r, d);
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}
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module gap() {
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translate([0, 0, gap_elevation])
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linear_extrude(gap_height)
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difference() {
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footprint();
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offset(-gap_depth) footprint();
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}
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}
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module undercut() {
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translate([53, cartridge_width - 7, -foot_height])
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linear_extrude(gap_elevation + foot_height)
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rotate(45)
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offset(3)
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square([16, 16]);
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}
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module tape() {
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translate([0, 0, (cartridge_height - tape_height) / 2]) {
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roller();
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tape_line();
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}
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}
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module roller() {
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translate(roller_position)
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cylinder(
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h=tape_height,
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r=10,
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);
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}
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module tape_line() {
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translate(tape_line_position)
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cube([
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window_depth - tape_line_position.x,
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roller_position.y - tape_line_position.y,
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tape_height
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]);
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}
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module nfc_coin() {
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translate([
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cartridge_length / 2,
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cartridge_width / 2,
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cartridge_height - nfc_coin_depth
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])
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cylinder(
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h=nfc_coin_depth + nfc_coin_tolerance,
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d=nfc_coin_diameter + 2 * nfc_coin_tolerance,
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);
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};
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module footprint() {
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hull() {
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translate([
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cartridge_length - back_vertical_fillet_radius,
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back_vertical_fillet_radius,
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]) {
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circle(back_vertical_fillet_radius);
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// translate([0, cartridge_width - back_vertical_fillet_radius])
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// circle(back_vertical_fillet_radius);
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}
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translate([
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cartridge_length - back_vertical_fillet_radius,
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cartridge_width - back_vertical_fillet_radius,
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]) circle(back_vertical_fillet_radius);
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translate([
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tape_guide_depth + side_vertical_fillet_radius * tan(0.5 * atan(tape_guide_slope)),
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side_vertical_fillet_radius,
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]) circle(side_vertical_fillet_radius);
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translate([
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tape_guide_depth + side_vertical_fillet_radius * tan(0.5 * atan(tape_guide_slope)),
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cartridge_width - side_vertical_fillet_radius,
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]) circle(side_vertical_fillet_radius);
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translate([
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front_vertical_fillet_radius,
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tape_guide_width + front_vertical_fillet_radius * tan(0.5 * atan(1 / tape_guide_slope)),
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]) circle(front_vertical_fillet_radius);
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translate([
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front_vertical_fillet_radius,
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cartridge_width - tape_guide_width - front_vertical_fillet_radius * tan(0.5 * atan(1 / tape_guide_slope)),
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]) circle(front_vertical_fillet_radius);
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}
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}
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module tracks() {
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track_interval = cartridge_width - 2 * track_side_inset;
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translate([track_front_inset, track_side_inset, cartridge_height])
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rotate([0, 90, 0]) {
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track();
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translate([0, track_interval]) track();
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}
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}
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module track() {
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track_length = cartridge_length - track_front_inset - track_back_inset;
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cylinder(
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h=track_taper_length,
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r1=0,
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r2=track_radius,
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);
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translate([0, 0, track_taper_length]) cylinder(
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h=track_length - 2 * track_taper_length,
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r=track_radius,
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);
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translate([0, 0, track_length - track_taper_length]) cylinder(
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h=track_taper_length,
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r1=track_radius,
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r2=0,
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);
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}
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module feet() {
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foot_interval = cartridge_width - 2 * foot_side_inset - foot_width;
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translate([foot_front_inset, foot_side_inset, -foot_height]) {
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foot();
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translate([0, foot_interval, 0]) foot();
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}
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}
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module foot() {
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foot_length = cartridge_length - foot_front_inset - foot_back_inset;
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translate([foot_height, 0])
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cube([
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foot_length - foot_height * 2,
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foot_width,
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foot_height,
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]);
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intersection() {
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cube([
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cartridge_length,
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foot_width,
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foot_height,
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]);
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union() {
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translate([foot_height, foot_width, foot_height])
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rotate([90, 90, 0])
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cylinder(h=foot_width, r=foot_height);
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translate([foot_length - foot_height, foot_width, foot_height])
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rotate([90, 90, 0])
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cylinder(h=foot_width, r=foot_height);
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}
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}
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}
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}
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}
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