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 screw_radius_measured = 2.8;
  36 screw_radius_print_fudge = 0.3;
  37 screw_radius = screw_radius_measured + screw_radius_print_fudge;
  38
  39 module sonar_sensors_2d(sonar_radius,
  40                         between_sonar_centers,
  41                         between_sonar_centers_variation) {
  42   hull(){
  43     circle(sonar_radius);
  44     translate([between_sonar_centers_variation, 0]){
  45       circle(sonar_radius); } }
  46   translate([between_sonar_centers, 0]) {
  47     circle(sonar_radius); } }
  48
  49 module sonar_holder_outline_2d(sonar_radius,
  50                                between_sonar_centers,
  51                                wall_thickness) {
  52   holder_radius = sonar_radius + wall_thickness;
  53   holder_diameter = holder_radius * 2;
  54   hull() {
  55     circle(holder_radius);
  56     translate([between_sonar_centers, 0]) {
  57       circle(holder_radius); }
  58     translate([sonar_radius + between_sonar_centers, -holder_radius]) {
  59       square([holder_diameter * 2, holder_diameter]); } } }
  60
  61 module sonar_binder_clip_holder(sonar_radius,
  62                                 between_sonar_centers,
  63                                 between_sonar_centers_variation,
  64                                 wall_thickness) {
  65   difference() {
  66     sonar_holder_outline_2d(sonar_radius,
  67                             between_sonar_centers,
  68                             wall_thickness);
  69     sonar_sensors_2d(sonar_radius,
  70                      between_sonar_centers,
  71                      between_sonar_centers_variation);
  72     translate([sonar_radius +
  73                between_sonar_centers +
  74                3 * (wall_thickness + sonar_radius),
  75                0,
  76                0]) {
  77       circle(screw_radius); } } }
  78
  79 /*
  80   This file is part of challenge-bot.
  81
  82   Challenge-bot is free software: you can redistribute it and/or modify
  83   it under the terms of the GNU Affero General Public License as published by
  84   the Free Software Foundation, either version 3 of the License, or
  85   (at your option) any later version.
  86
  87   GNU Affero Emacs is distributed in the hope that it will be useful,
  88   but WITHOUT ANY WARRANTY; without even the implied warranty of
  89   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  90   GNU Affero General Public License for more details.
  91
  92   You should have received a copy of the GNU Affero General Public License
  93   along with challenge-bot.  If not, see <http://www.gnu.org/licenses/>.
  94 */