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 include <oshw-data.scad>
  18
  19 // 3/16 inch in mm deck_depth = 4.7625;
  20 // 1/4 inch in mm = 6.35
  21 // subtract a little to be a squeeze fit
  22 deck_depth = 4.7625 - 0.4;
  23 // sonar sensor measurements taken with calipers:
  24 //  10.82 in between, 42.33 outside, 15.82 diameter
  25 // measured diameter of 15.82 with calipers,
  26 //  but when printed ends up being too small, so add some
  27 sonar_diameter = 15.82 + 0.4;
  28 sonar_radius = sonar_diameter / 2;
  29 sonar_height = 13.8;
  30 between_sonar_centers = sonar_diameter + 10.82;
  31 // the sonar cylinders are placed on the pcb at slightly different positions
  32 //  from one sensor to the next, so this allows for that variance.
  33 between_sonar_centers_variance = 2;
  34 // keep at least this much plastic surrounding the sonar cylinder on all sides
  35 buffer = 3;
  36 sonar_holder_length = buffer + between_sonar_centers + sonar_diameter + buffer;
  37 sonar_holder_width = buffer + sonar_diameter + buffer;
  38
  39 // 3/16 inch in mm deck_depth = 4.7625;
  40 // 1/4 inch in mm = 6.35
  41 // subtract a little to be a squeeze fit
  42 deck_depth = 4.7625 - 0.4;
  43 // sonar sensor measurements taken with calipers:
  44 //  10.82 in between, 42.33 outside, 15.82 diameter
  45 // measured diameter of 15.82 with calipers,
  46 //  but when printed ends up being too small, so add some
  47 sonar_diameter = 15.82 + 0.4;
  48 sonar_radius = sonar_diameter / 2;
  49 sonar_height = 13.8;
  50 between_sonar_centers = sonar_diameter + 10.82;
  51 // the sonar cylinders are placed on the pcb at slightly different positions
  52 //  from one sensor to the next, so this allows for that variance.
  53 between_sonar_centers_variance = 2;
  54 // keep at least this much plastic surrounding the sonar cylinder on all sides
  55 buffer = 3;
  56 sonar_holder_length = buffer + between_sonar_centers + sonar_diameter + buffer;
  57 sonar_holder_width = buffer + sonar_diameter + buffer;
  58 // sonar_holder_depth is deck_depth minus a little bit to make arm fit
  59 //  into deck holder
  60 sonar_holder_depth = deck_depth - 0.7875;
  61
  62 deck_holder_length = sonar_holder_depth * 2 + deck_depth + 15;
  63
  64 module deck_holder() {
  65   deck_holder_width = sonar_holder_width - deck_depth;
  66   deck_holder_height = sonar_holder_depth * 2 + deck_depth;
  67   linear_extrude(height = deck_holder_width) {
  68     difference() {
  69       square([deck_holder_length, deck_holder_height]);
  70       translate([sonar_holder_depth - 0.15, sonar_holder_depth - 0.15]) {
  71         square(deck_depth + 0.3); }
  72       translate([deck_holder_height, sonar_holder_depth - 0.3]) {
  73         square([deck_holder_length - (deck_holder_height),
  74                 deck_depth + 0.6]); } } }
  75   translate([deck_holder_length - oshw_dy * 0.05, 0, deck_holder_width / 2])
  76   scale([0.1, 1, 0.1])
  77   rotate(v = [1, 0, 0], a = 90)
  78   rotate(90)
  79   linear_extrude(height = 0.5)
  80   oshw();
  81   translate([deck_holder_length - oshw_dy * 0.05,
  82              deck_holder_height + 0.5,
  83              deck_holder_width / 2])
  84   rotate(v = [1, 0, 0], a = 90)
  85   rotate(90)
  86   scale([0.1, 0.1, 1])
  87   linear_extrude(height = 0.5)
  88   oshw(); }