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 $fn = 60;
   8
   9 // 3/16 inch in mm deck_depth = 4.7625;
  10 // 1/4 inch in mm - a little to be a squeeze fit
  11 deck_depth = 6.35 - 0.4;
  12 sonar_plate_width = 20;
  13 sonar_plate_length = 45;
  14 // sonar sensor measurements taken with calipers:
  15 //  9.6 in between, 41.33 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 = 15.82 + 9.6;
  21
  22 sonar_holder_length = sonar_plate_length + 10;
  23 sonar_holder_width = sonar_plate_width + 3;
  24 sonar_holder_depth = 3;
  25
  26
  27 module sensors(){
  28   translate([between_sensor_centers / 2, 0, 0]){
  29     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}
  30   translate([-between_sensor_centers / 2, 0, 0]){
  31     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}}
  32
  33 module deck_holder(){
  34   deck_holder_length = 25;
  35   deck_holder_width = sonar_holder_width;
  36   cube([deck_holder_length, deck_holder_width, sonar_holder_depth]);
  37   translate([0, 0, sonar_holder_depth]){
  38     cube([deck_depth, deck_holder_width, deck_depth]);
  39     translate([0, 0, deck_depth]){
  40       cube([deck_holder_length, deck_holder_width, sonar_holder_depth]);}}}
  41
  42 module sonar_table_top_holder(){
  43   difference(){
  44     union(){
  45       cube([sonar_holder_length, sonar_holder_width, sonar_holder_depth]);
  46       translate([sonar_holder_length, 0, 0]){
  47         deck_holder();}}
  48     translate([between_sensor_centers / 2 + sonar_sensor_radius + 3,
  49                sonar_holder_width / 2,
  50                -1]){
  51       sensors();}
  52     // cut out a bit of the circle to make it 3d printable,
  53     //  no severe overhang
  54     translate([3 + sonar_sensor_radius,
  55                sonar_holder_width - 3.025,
  56                sonar_holder_depth / 2 - 0.025]){
  57       cube([10, 6.1, sonar_holder_depth + .1], center = true);
  58       translate([between_sensor_centers, 0, 0]){
  59         cube([10, 6.1, sonar_holder_depth + .1], center = true);}}}}
  60
  61 rotate([90, 0, 0]){
  62   sonar_table_top_holder();}