challenge-bot.com Git - challenge-bot/blob - 3d-printables/sonar-binder-clip-holder-data.scad

   1 /*
   2   Copyright 2016 Daniel Watson
   3   See the end of the file for license conditions.
   4 */
   5 /* challenge-bot
   6 // GNU AGPLv3 (or later at your option)
   7 // project available here:
   8 // https://challenge-bot.com/ */
   9
  10 /*
  11   this holds an hc-sr04 sonar sensor to a 3/16 inch deck.
  12   http://fritzing.org/projects/hc-sr04-project
  13   it can hold the sonar sensor either facing down, or forwards.
  14   when facing down, it can detect if it passes over the edge of a table.
  15   when facing forwards, it can detect and follow something in front
  16   of it.
  17 */
  18
  19 $fn = 50;
  20
  21 sonar_diameter_measured = 15.82;
  22 sonar_diameter_print_fudge = 0.5;
  23 sonar_diameter = sonar_diameter_measured + sonar_diameter_print_fudge;
  24 sonar_radius = sonar_diameter / 2;
  25
  26 between_sonar_cans = 10.82;
  27 between_sonar_centers = sonar_diameter + between_sonar_cans;
  28
  29 // the sonar cylinders are placed on the pcb at slightly different positions
  30 //  from one sensor to the next, so this allows for that variance.
  31 between_sonar_centers_variation = 2;
  32
  33 wall_thickness = 3;
  34
  35 module sonar_sensors_2d(sonar_radius,
  36                         between_sonar_centers,
  37                         between_sonar_centers_variation) {
  38   hull(){
  39     circle(sonar_radius);
  40     translate([between_sonar_centers_variation, 0]){
  41       circle(sonar_radius); } }
  42   translate([between_sonar_centers, 0]) {
  43     circle(sonar_radius); } }
  44
  45 module sonar_holder_outline_2d(sonar_radius,
  46                                between_sonar_centers,
  47                                wall_thickness) {
  48   holder_radius = sonar_radius + wall_thickness;
  49   hull() {
  50     circle(holder_radius);
  51     translate([between_sonar_centers, 0]) {
  52       circle(holder_radius); } } }
  53
  54 module sonar_binder_clip_holder(sonar_radius,
  55                                 between_sonar_centers,
  56                                 between_sonar_centers_variation,
  57                                 wall_thickness) {
  58   difference() {
  59     sonar_holder_outline_2d(sonar_radius,
  60                             between_sonar_centers,
  61                             wall_thickness);
  62     sonar_sensors_2d(sonar_radius,
  63                      between_sonar_centers,
  64                      between_sonar_centers_variation); } }
  65
  66 /*
  67   This file is part of challenge-bot.
  68
  69   Challenge-bot is free software: you can redistribute it and/or modify
  70   it under the terms of the GNU Affero General Public License as published by
  71   the Free Software Foundation, either version 3 of the License, or
  72   (at your option) any later version.
  73
  74   GNU Affero Emacs is distributed in the hope that it will be useful,
  75   but WITHOUT ANY WARRANTY; without even the implied warranty of
  76   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  77   GNU Affero General Public License for more details.
  78
  79   You should have received a copy of the GNU Affero General Public License
  80   along with challenge-bot.  If not, see <http://www.gnu.org/licenses/>.
  81 */