challenge-bot.com Git - challenge-bot/blob - 3d-printables/deck-holder-data.scad

   1 // challenge-bot
   2 // GNU AGPLv3 (or later at your option)
   3 // project available at these locations:
   4 // https://gitorious.org/ozzloy/challenge-bot
   5 // https://github.com/waynegramlich/challenge-bot
   6
   7 /*
   8   this holds an hc-sr04 sonar sensor to a 3/16 inch deck.
   9   http://fritzing.org/projects/hc-sr04-project
  10   it can hold the sonar sensor either facing down, or forwards.
  11   when facing down, it can detect if it passes over the edge of a table.
  12   when facing forwards, it can detect and follow something in front of it.
  13  */
  14
  15 $fn = 60;
  16
  17 use <oshw.scad>
  18 // 3/16 inch in mm deck_depth = 4.7625;
  19 // 1/4 inch in mm = 6.35
  20 // subtract a little to be a squeeze fit
  21 deck_depth = 4.7625 - 0.4;
  22 // sonar sensor measurements taken with calipers:
  23 //  10.82 in between, 42.33 outside, 15.82 diameter
  24 // measured diameter of 15.82 with calipers,
  25 //  but when printed ends up being too small, so add some
  26 sonar_diameter = 15.82 + 0.4;
  27 sonar_radius = sonar_diameter / 2;
  28 sonar_height = 13.8;
  29 between_sonar_centers = sonar_diameter + 10.82;
  30 // the sonar cylinders are placed on the pcb at slightly different positions
  31 //  from one sensor to the next, so this allows for that variance.
  32 between_sonar_centers_variance = 2;
  33 // keep at least this much plastic surrounding the sonar cylinder on all sides
  34 buffer = 3;
  35 sonar_holder_length = buffer + between_sonar_centers + sonar_diameter + buffer;
  36 sonar_holder_width = buffer + sonar_diameter + buffer;
  37 // sonar_holder_depth is deck_depth minus a little bit to make arm fit
  38 //  into deck holder
  39 sonar_holder_depth = deck_depth - 0.7875;
  40
  41 deck_holder_length = sonar_holder_depth * 2 + deck_depth + 15;
  42
  43 oshw_dy = 120.366;
  44 oshw_dx = 133.888;
  45
  46 // 3/16 inch in mm deck_depth = 4.7625;
  47 // 1/4 inch in mm = 6.35
  48 // subtract a little to be a squeeze fit
  49 deck_depth = 4.7625 - 0.4;
  50 // sonar sensor measurements taken with calipers:
  51 //  10.82 in between, 42.33 outside, 15.82 diameter
  52 // measured diameter of 15.82 with calipers,
  53 //  but when printed ends up being too small, so add some
  54 sonar_diameter = 15.82 + 0.4;
  55 sonar_radius = sonar_diameter / 2;
  56 sonar_height = 13.8;
  57 between_sonar_centers = sonar_diameter + 10.82;
  58 // the sonar cylinders are placed on the pcb at slightly different positions
  59 //  from one sensor to the next, so this allows for that variance.
  60 between_sonar_centers_variance = 2;
  61 // keep at least this much plastic surrounding the sonar cylinder on all sides
  62 buffer = 3;
  63 sonar_holder_length = buffer + between_sonar_centers + sonar_diameter + buffer;
  64 sonar_holder_width = buffer + sonar_diameter + buffer;
  65 // sonar_holder_depth is deck_depth minus a little bit to make arm fit
  66 //  into deck holder
  67 sonar_holder_depth = deck_depth - 0.7875;
  68
  69 deck_holder_length = sonar_holder_depth * 2 + deck_depth + 15;
  70
  71 module sonars() {
  72   translate([between_sonar_centers / 2, 0, 0]) {
  73     cylinder(r = sonar_radius, h = sonar_height); }
  74   // for the variance with which the physical sonar cylinders are placed
  75   translate([between_sonar_centers / 2 - between_sonar_centers_variance, 0, 0]) {
  76     cylinder(r = sonar_radius, h = sonar_height);
  77     translate([0, -sonar_radius, 0]) {
  78       cube([between_sonar_centers_variance, sonar_diameter, sonar_height]); } }
  79   translate([-between_sonar_centers / 2, 0, 0]) {
  80     cylinder(r = sonar_radius, h = sonar_height); } }
  81
  82 module sonar_holder() {
  83   elbow_length = deck_depth;
  84   rounded_corner_radius = buffer;
  85   difference() {
  86     cube([sonar_holder_length, sonar_holder_width, sonar_holder_depth]);
  87     translate([sonar_holder_length / 2, sonar_holder_width / 2, -0.05]) {
  88       sonars(); }
  89     translate([sonar_holder_length - rounded_corner_radius,
  90                sonar_holder_width - rounded_corner_radius,
  91                0]) {
  92       corner_rounder(rounded_corner_radius, sonar_holder_depth); } }
  93   translate([sonar_holder_length, 0, 0]) {
  94     cube([elbow_length, deck_depth, sonar_holder_depth]);
  95     translate([elbow_length, 0, 0]) {
  96       linear_extrude(height = sonar_holder_depth) {
  97         polygon([[                 0, 0],
  98                  [sonar_holder_depth, 0],
  99                  [sonar_holder_depth, sonar_holder_width / 2],
 100                  [                 0,
 101                                    sonar_holder_width / 2 + sonar_holder_depth]]); }
 102       translate([0, (sonar_holder_width + sonar_holder_depth) / 2, 0]) {
 103         cube([sonar_holder_depth / 2,
 104               (sonar_holder_width - sonar_holder_depth) / 2 + 0.8,
 105               sonar_holder_depth]); }
 106       translate([-1.7, sonar_holder_width + 0.8, 0]) {
 107         linear_extrude(height = sonar_holder_depth) {
 108           polygon([[                           0, 0],
 109                    [sonar_holder_depth / 2 + 1.7, 4],
 110                    [sonar_holder_depth / 2 + 1.7, 0]]); } } } } }
 111
 112 module deck_holder() {
 113   deck_holder_width = sonar_holder_width - deck_depth;
 114   deck_holder_height = sonar_holder_depth * 2 + deck_depth;
 115   linear_extrude(height = deck_holder_width) {
 116     difference() {
 117       square([deck_holder_length, deck_holder_height]);
 118       translate([sonar_holder_depth - 0.15, sonar_holder_depth - 0.15]) {
 119         square(deck_depth + 0.3); }
 120       translate([deck_holder_height, sonar_holder_depth - 0.3]) {
 121         square([deck_holder_length - (deck_holder_height),
 122                 deck_depth + 0.6]); } } }
 123   translate([deck_holder_length - oshw_dy * 0.05, 0, deck_holder_width / 2])
 124   scale([0.1, 1, 0.1])
 125   rotate(v = [1, 0, 0], a = 90)
 126   rotate(90)
 127   linear_extrude(height = 0.5)
 128   oshw();
 129   translate([deck_holder_length - oshw_dy * 0.05,
 130              deck_holder_height + 0.5,
 131              deck_holder_width / 2])
 132   rotate(v = [1, 0, 0], a = 90)
 133   rotate(90)
 134   scale([0.1, 0.1, 1])
 135   linear_extrude(height = 0.5)
 136   oshw(); }
 137
 138 module corner_rounder_2d(radius) {
 139   difference() {
 140     square(radius);
 141     circle(radius); } }
 142
 143 module corner_rounder(radius, height) {
 144   linear_extrude(height = height) {
 145     corner_rounder_2d(radius); } }