challenge-bot.com Git - ozzloy@gmail.com/3d-printables/blob - crazyflie-2.0-housing.scad

   1 /* GNU AGPLv3 (or later at your option)
   2    see bottom for more license info */
   3
   4 /* protective housing for crazyflie 2.0.
   5
   6    reinforce the arms so they do not snap.
   7
   8    keep the props up high so they do not get hairs from the ground
   9    wrapped around the motor shaft.
  10  */
  11
  12 $fn = 300;
  13
  14 // propeller diameter was measured with calipers
  15 propeller_radius = 46.35 / 2;
  16 // 7mm from spec
  17 motor_grippable_height = 8;
  18 motor_gripper_height = motor_grippable_height / 2;
  19 holder_height = motor_grippable_height * 1.1;
  20
  21 propeller_radius_measured = 46.35 / 2;
  22 holder_wall_thickness = 1.2;
  23 propeller_guard_wall_thickness = 1.2;
  24
  25 motor_diameter = 7;
  26 motor_height_measured = 17;
  27 motor_radius = motor_diameter / 2;
  28
  29 module propeller_protector(motor_radius,
  30                            holder_wall_thickness,
  31                            propeller_guard_wall_thickness,
  32                            motor_gripper_height,
  33                            holder_height,
  34                            propeller_radius) {
  35   propeller_guard_inner_radius = propeller_radius + 1.5;
  36   holder_outer_radius = motor_radius + holder_wall_thickness;
  37   number_of_arms = 3;
  38   linear_extrude(height = motor_gripper_height) {
  39     // part that holds the motor
  40     difference() {
  41       circle(r = holder_outer_radius);
  42       circle(r = motor_radius); }
  43     for(arm_number = [0: (number_of_arms - 1)]) {
  44       rotate(arm_number * (360 / number_of_arms)) {
  45         translate([-propeller_guard_inner_radius,
  46                    -holder_wall_thickness / 2]) {
  47           square([propeller_guard_inner_radius - motor_radius,
  48                   holder_wall_thickness]); } } } }
  49   // prop protector
  50   linear_extrude(height = holder_height) {
  51     difference() {
  52       circle(propeller_guard_inner_radius +
  53              propeller_guard_wall_thickness);
  54       circle(propeller_guard_inner_radius); } } }
  55
  56 propeller_protector(motor_radius,
  57                     holder_wall_thickness,
  58                     propeller_guard_wall_thickness,
  59                     motor_gripper_height,
  60                     holder_height,
  61                     propeller_radius_measured);
  62
  63 /*
  64   This file is part of 3d-printables.
  65
  66   3d-printables is free software: you can redistribute it and/or modify
  67   it under the terms of the GNU Affero General Public License as published by
  68   the Free Software Foundation, either version 3 of the License, or
  69   (at your option) any later version.
  70
  71   3d-printables is distributed in the hope that it will be useful,
  72   but WITHOUT ANY WARRANTY; without even the implied warranty of
  73   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  74   GNU Affero General Public License for more details.
  75
  76   You should have received a copy of the GNU Affero General Public License
  77   along with challenge-bot.  If not, see <http://www.gnu.org/licenses/>.
  78 */