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 sonar_binder_clip_holder_height = 2;
  40
  41 module sonar_sensors_2d(sonar_radius,
  42                         between_sonar_centers,
  43                         between_sonar_centers_variation) {
  44   hull(){
  45     circle(sonar_radius);
  46     translate([between_sonar_centers_variation, 0]){
  47       circle(sonar_radius); } }
  48   translate([between_sonar_centers, 0]) {
  49     circle(sonar_radius); } }
  50
  51 module sonar_holder_outline_2d(sonar_radius,
  52                                between_sonar_centers,
  53                                wall_thickness) {
  54   holder_radius = sonar_radius + wall_thickness;
  55   holder_diameter = holder_radius * 2;
  56   hull() {
  57     circle(holder_radius);
  58     translate([between_sonar_centers - sonar_radius - wall_thickness,
  59                -holder_radius]) {
  60       square(holder_diameter); } } }
  61
  62 module sonar_holder_2d(sonar_radius,
  63                        between_sonar_centers,
  64                        between_sonar_centers_variation,
  65                        wall_thickness) {
  66   difference() {
  67     sonar_holder_outline_2d(sonar_radius,
  68                             between_sonar_centers,
  69                             wall_thickness);
  70     sonar_sensors_2d(sonar_radius,
  71                      between_sonar_centers,
  72                      between_sonar_centers_variation); } }
  73
  74 module binder_clip_holder_2d(binder_clip_holder_length,
  75                              screw_radius,
  76                              holder_radius){
  77   difference() {
  78   square([binder_clip_holder_length, holder_radius * 2]);
  79   translate([binder_clip_holder_length - holder_radius, holder_radius]) {
  80     circle(screw_radius); } } }
  81
  82 module sonar_binder_clip_holder_2d(sonar_radius,
  83                                    between_sonar_centers,
  84                                    between_sonar_centers_variation,
  85                                    wall_thickness) {
  86   sonar_holder_2d(sonar_radius,
  87                   between_sonar_centers,
  88                   between_sonar_centers_variation,
  89                   wall_thickness);
  90   holder_radius = sonar_radius + wall_thickness;
  91   binder_clip_holder_length = 2 * holder_radius;
  92   translate([between_sonar_centers + holder_radius, -holder_radius]){
  93     binder_clip_holder_2d(binder_clip_holder_length,
  94                        screw_radius,
  95                        holder_radius); } }
  96
  97 module sonar_binder_clip_holder(sonar_radius,
  98                                 between_sonar_centers,
  99                                 between_sonar_centers_variation,
 100                                 wall_thickness,
 101                                 sonar_binder_clip_holder_height) {
 102   linear_extrude(height = sonar_binder_clip_holder_height) {
 103     sonar_binder_clip_holder_2d(sonar_radius,
 104                                 between_sonar_centers,
 105                                 between_sonar_centers_variation,
 106                                 wall_thickness); } }
 107
 108 module binder_clip_holder(binder_clip_holder_length,
 109                           screw_radius,
 110                           holder_radius,
 111                           binder_clip_holder_height) {
 112      linear_extrude(height = binder_clip_holder_height) {
 113           binder_clip_holder_2d(binder_clip_holder_length,
 114                                 screw_radius,
 115                                 holder_radius); } }
 116
 117 /*
 118   This file is part of challenge-bot.
 119
 120   Challenge-bot is free software: you can redistribute it and/or modify
 121   it under the terms of the GNU Affero General Public License as published by
 122   the Free Software Foundation, either version 3 of the License, or
 123   (at your option) any later version.
 124
 125   GNU Affero Emacs is distributed in the hope that it will be useful,
 126   but WITHOUT ANY WARRANTY; without even the implied warranty of
 127   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 128   GNU Affero General Public License for more details.
 129
 130   You should have received a copy of the GNU Affero General Public License
 131   along with challenge-bot.  If not, see <http://www.gnu.org/licenses/>.
 132 */