challenge-bot.com Git - challenge-bot/blob - 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 // 3/8 inch in mm
   8 deck_depth = 4.7625;
   9 sonar_plate_width = 20;
  10 sonar_plate_length = 45;
  11 // sonar sensor measurements taken with calipers:
  12 //  9.6 in between, 41.33 outside, 15.82 diameter
  13 // measured diameter of 15.82 with calipers,
  14 //  but when printed ends up being too small
  15 sonar_sensor_radius = 15.82 / 2 + 0.3;
  16 sonar_sensor_height = 13.8;
  17 between_sensor_centers = 15.82 + 9.6;
  18
  19 sonar_holder_length = sonar_plate_length + 10;
  20 sonar_holder_width = sonar_plate_width + 3;
  21 sonar_holder_depth = 3;
  22
  23
  24 module sensors(){
  25   translate([between_sensor_centers / 2, 0, 0]){
  26     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}
  27   translate([-between_sensor_centers / 2, 0, 0]){
  28     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}}
  29
  30 module deck_holder(){
  31   deck_holder_length = 25;
  32   deck_holder_width = sonar_holder_width;
  33   cube([deck_holder_length, deck_holder_width, sonar_holder_depth]);
  34   translate([0, 0, sonar_holder_depth]){
  35     cube([deck_depth, deck_holder_width, deck_depth]);
  36     translate([0, 0, deck_depth]){
  37       cube([deck_holder_length, deck_holder_width, sonar_holder_depth]);}}}
  38
  39 module sonar_table_top_holder(){
  40   difference(){
  41     union(){
  42       cube([sonar_holder_length, sonar_holder_width, sonar_holder_depth]);
  43       translate([sonar_holder_length, 0, 0]){
  44         deck_holder();}}
  45     translate([between_sensor_centers / 2 + sonar_sensor_radius + 3,
  46                sonar_holder_width / 2,
  47                -1]){
  48       sensors();}
  49     // cut out a bit of the circle to make it 3d printable,
  50     //  no severe overhang
  51     translate([3 + sonar_sensor_radius,
  52                sonar_holder_width - 3.025,
  53                sonar_holder_depth / 2 - 0.025]){
  54       cube([10, 6.1, sonar_holder_depth + .1], center = true);
  55       translate([between_sensor_centers, 0, 0]){
  56         cube([10, 6.1, sonar_holder_depth + .1], center = true);}}}}
  57
  58 rotate([90, 0, 0]){
  59   sonar_table_top_holder();}