challenge-bot.com Git - challenge-bot/blob - 3d-printables/deck-holder-data.scad

   1 /*
   2   Copyright (C) 2015 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 of it.
  16  */
  17
  18 $fn = 60;
  19
  20 include <oshw-data.scad>
  21
  22 // 3/16 inch in mm deck_depth = 4.7625;
  23 // 1/4 inch in mm = 6.35
  24 // subtract a little to be a squeeze fit
  25 deck_depth = 4.7625 - 0.4;
  26 // sonar sensor measurements taken with calipers:
  27 //  10.82 in between, 42.33 outside, 15.82 diameter
  28 // measured diameter of 15.82 with calipers,
  29 //  but when printed ends up being too small, so add some
  30 sonar_diameter = 15.82 + 0.4;
  31 sonar_radius = sonar_diameter / 2;
  32 sonar_height = 13.8;
  33 between_sonar_centers = sonar_diameter + 10.82;
  34 // the sonar cylinders are placed on the pcb at slightly different positions
  35 //  from one sensor to the next, so this allows for that variance.
  36 between_sonar_centers_variance = 2;
  37 // keep at least this much plastic surrounding the sonar cylinder on all sides
  38 buffer = 3;
  39 sonar_holder_length = buffer + between_sonar_centers + sonar_diameter + buffer;
  40 sonar_holder_width = buffer + sonar_diameter + buffer;
  41
  42 // sonar_holder_depth is deck_depth minus a little bit to make arm fit
  43 //  into deck holder
  44 sonar_holder_depth = deck_depth - 0.7875;
  45
  46 deck_holder_length = sonar_holder_depth * 2 + deck_depth + 15;
  47
  48 module deck_holder() {
  49   oshw_height = 0.75;
  50   deck_holder_width = sonar_holder_width - deck_depth;
  51   deck_holder_height = sonar_holder_depth * 2 + deck_depth;
  52   linear_extrude(height = deck_holder_width) {
  53     difference() {
  54       square([deck_holder_length, deck_holder_height]);
  55       translate([sonar_holder_depth - 0.15, sonar_holder_depth - 0.15]) {
  56
  57 /*
  58   This file is part of challenge-bot.
  59
  60   Challenge-bot is free software: you can redistribute it and/or modify
  61   it under the terms of the GNU Affero General Public License as published by
  62   the Free Software Foundation, either version 3 of the License, or
  63   (at your option) any later version.
  64
  65   GNU Affero Emacs is distributed in the hope that it will be useful,
  66   but WITHOUT ANY WARRANTY; without even the implied warranty of
  67   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  68   GNU Affero General Public License for more details.
  69
  70   You should have received a copy of the GNU Affero General Public License
  71   along with challenge-bot.  If not, see <http://www.gnu.org/licenses/>.
  72 */
  73         square(deck_depth + 0.3); }
  74       translate([deck_holder_height, sonar_holder_depth - 0.3]) {
  75         square([deck_holder_length - (deck_holder_height),
  76                 deck_depth + 0.6]); } } }
  77   translate([deck_holder_length - oshw_dy * 0.05, 0, deck_holder_width / 2])
  78   scale([0.1, 1, 0.1])
  79   rotate(v = [1, 0, 0], a = 90)
  80   rotate(90)
  81   linear_extrude(height = 0.5)
  82   oshw();
  83   translate([deck_holder_length - oshw_dy * 0.05,
  84              deck_holder_height + 0.5,
  85              deck_holder_width / 2])
  86   rotate(v = [1, 0, 0], a = 90)
  87   rotate(90)
  88   scale([0.1, 0.1, 1])
  89   linear_extrude(height = 0.5)
  90   oshw(); }