challenge-bot.com Git - challenge-bot/blob - 3d-printables/sonar-table-top-holder.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 $fn = 60;
   8
   9 // 3/16 inch in mm deck_depth = 4.7625;
  10 // 1/4 inch in mm = 6.35
  11 // subtract a little to be a squeeze fit
  12 deck_depth = 4.7625 - 0.4;
  13 sonar_plate_width = 20;
  14 // sonar sensor measurements taken with calipers:
  15 //  10.82 in between, 42.33 outside, 15.82 diameter
  16 // measured diameter of 15.82 with calipers,
  17 //  but when printed ends up being too small
  18 sonar_sensor_radius = 15.82 / 2 + 0.3;
  19 sonar_sensor_height = 13.8;
  20 between_sensor_centers = sonar_sensor_radius * 2 + 10.82;
  21 between_sensor_centers_variance = 2;
  22 sonar_plate_length = 3 + between_sensor_centers + sonar_sensor_radius + 3;
  23 sonar_holder_length = sonar_plate_length + 10;
  24 sonar_holder_width = sonar_plate_width + 3;
  25 sonar_holder_depth = 4;
  26
  27 deck_holder_length = 30;
  28
  29 module sensors(){
  30   translate([between_sensor_centers / 2, 0, 0]){
  31     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}
  32   translate([between_sensor_centers / 2 - between_sensor_centers_variance,
  33              0,
  34              0]){
  35     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);
  36     translate([0, -sonar_sensor_radius, 0]){
  37       cube([between_sensor_centers_variance,
  38             sonar_sensor_radius * 2,
  39             sonar_sensor_height]);}}
  40   translate([-between_sensor_centers / 2, 0, 0]){
  41     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}}
  42
  43 module sensor_holder(){
  44   difference(){
  45     cube([sonar_holder_length, sonar_holder_width, sonar_holder_depth]);
  46     translate([sonar_holder_length / 2, sonar_holder_width / 2, -0.05]){
  47       sensors();}}
  48   translate([sonar_holder_length, 0, 0]){
  49     cube([sonar_holder_depth + 0.7, deck_depth, deck_depth - 0.7]);
  50     translate([sonar_holder_depth + 0.7, 0, 0]){
  51       // subtract a little bit (0.3) to make it fit
  52       cube([deck_depth - 0.7, sonar_holder_width, deck_depth - 0.7]);}}}
  53
  54 module deck_holder(){
  55   deck_holder_width = sonar_holder_width - deck_depth;
  56   cube([deck_holder_length, sonar_holder_depth, deck_holder_width]);
  57   cube([sonar_holder_depth,
  58         sonar_holder_depth * 2 + deck_depth,
  59         deck_holder_width]);
  60   translate([0, sonar_holder_depth + deck_depth, 0]){
  61     cube([deck_holder_length, sonar_holder_depth, deck_holder_width]);}
  62   translate([sonar_holder_depth + deck_depth, 0, 0]){
  63     cube([sonar_holder_depth,
  64           sonar_holder_depth * 2 + deck_depth,
  65           deck_holder_width]);}}
  66
  67 translate([0, sonar_holder_depth * 2 + deck_depth + 2, 0]){
  68   sensor_holder();}
  69 deck_holder();