add variation on distance between sonar sensors

[challenge-bot] / 3d-printables / sonar-binder-clip-holder-data.scad

/*
  Copyright 2016 Daniel Watson
  See the end of the file for license conditions.
*/
/* challenge-bot
// GNU AGPLv3 (or later at your option)
// project available here:
// https://challenge-bot.com/ */

/*
  this holds an hc-sr04 sonar sensor to a 3/16 inch deck.
  http://fritzing.org/projects/hc-sr04-project
  it can hold the sonar sensor either facing down, or forwards.
  when facing down, it can detect if it passes over the edge of a table.
  when facing forwards, it can detect and follow something in front
  of it.
*/

$fn = 50;

sonar_diameter_measured = 15.82;
sonar_diameter_print_fudge = 0.5;
sonar_diameter = sonar_diameter_measured + sonar_diameter_print_fudge;
sonar_radius = sonar_diameter / 2;

between_sonar_cans = 10.82;
between_sonar_centers = sonar_diameter + between_sonar_cans;

// the sonar cylinders are placed on the pcb at slightly different positions
//  from one sensor to the next, so this allows for that variance.
between_sonar_centers_variation = 2;

module sonar_binder_clip_holder(sonar_radius,
																between_sonar_centers,
																between_sonar_centers_variation) {
	hull(){
		circle(sonar_radius);
		translate([between_sonar_centers_variation, 0]){
			circle(sonar_radius); } }
	translate([between_sonar_centers, 0]) {
		circle(sonar_radius); } }

/*
  This file is part of challenge-bot.

  Challenge-bot is free software: you can redistribute it and/or modify
  it under the terms of the GNU Affero General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  GNU Affero Emacs is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License
  along with challenge-bot.  If not, see <http://www.gnu.org/licenses/>.
*/