2 Copyright (C) 2015 Daniel Watson
3 See the end of the file for license conditions.
6 // GNU AGPLv3 (or later at your option)
7 // project available here:
8 // https://challenge-bot.com/
12 // use 10 ish for development, 60 or so for printing
15 /* measured with calipers */
16 ball_diameter
= 11 + 0.85; // extra bit added for printing imprecision
17 ball_radius
= ball_diameter
/ 2;
19 standoff_height
= 60; // kyle eyeballed
23 * slow down just before top solid infill of deck flange
24 * slow down just before switching from solid to forked portion of standoff
30 holder_arms_length
= 20;
32 holder_floor
+ holder_arms_length
+ (3 / 4) * ball_diameter
;
34 holder_radius
= ball_radius
+ wall_thickness
;
35 holder_diameter
= holder_radius
* 2;
37 standoff_radius
= holder_radius
; // 0.580 / 2 inches from spec sheet
38 standoff_lower_portion_height
= standoff_height
- holder_height
;
40 // eyeballed caster flange height, (0.580/5) inches, times 2 to be stronger
41 caster_flange_height
= 5;
42 caster_flange_width
= 20.32; // 0.800 inches
44 deck_pitch
= 25.4; // measured center to center on grid on pegboard
45 deck_flange_height
= 2.9464;
46 deck_flange_screw_radius
= 3.556 / 2 + 0.4; // For #6 machine screws
47 deck_flange_radius
= (deck_pitch
) / 2 + deck_flange_screw_radius
+ 3;
49 module
deck_flange() {
50 deck_pitch_diagonal
= sqrt(2 * pow(deck_pitch
, 2));
51 cylinder(h
= deck_flange_height
, r
= holder_radius
+ 2);
53 scale([0.40, 0.40, 1]) {
54 linear_extrude(height
= deck_flange_height
) {
57 translate([deck_pitch_diagonal
/ 2 * ii
, 0, -.1])
58 cylinder(h
= deck_flange_height
* 1.1,
59 r
= deck_flange_screw_radius
); }
60 translate([0, deck_pitch_diagonal
/ 2, -.1])
61 cylinder(h
= deck_flange_height
* 1.1,
62 r
= deck_flange_screw_radius
); } }
64 module
deck_flange_reinforcement() {
65 translate([-deck_flange_radius
,
66 -.5 * deck_flange_height
/ 2,
67 deck_flange_height
]) {
69 cube([deck_flange_radius
, deck_flange_height
/ 2, deck_flange_radius
]);
70 translate([-.1, -.05 * deck_flange_height
, 0]) {
72 cube([deck_flange_radius
* 1.5, // 1.5 is bigger than sqrt(2)
73 deck_flange_height
* 1.1, // 1.1 is bigger than 1
74 deck_flange_radius
]); } } } } }
76 module
ball_holder() {
79 cylinder(r
= holder_radius
, h
= holder_height
);
80 translate([0, 0, holder_arms_length
]) {
81 cylinder(r1
= holder_radius
,
82 r2
= holder_radius
+ wall_thickness
,
84 translate([0, 0, wall_thickness
]) {
85 cylinder(r
= wall_thickness
+ holder_radius
,
88 - wall_thickness
); } } }
89 translate([0, 0, ball_radius
+ holder_floor
+ holder_arms_length
]) {
90 sphere(r
= ball_radius
); }
91 translate([0, 0, holder_floor
+ (holder_height
- holder_floor
) / 2 + 0.5]) {
92 cube([holder_diameter
+ wall_thickness
* 2 + 0.1,
94 holder_height
- holder_floor
+ 0.1],
97 module
caster_standoff() {
98 cylinder(h
= standoff_lower_portion_height
,
102 rotate([0, 0, 45 + 90 * ii
])
103 deck_flange_reinforcement(); }
104 translate([0, 0, standoff_lower_portion_height
]) {
108 This file is part of challenge-bot.
110 Challenge-bot is free software: you can redistribute it and/or modify
111 it under the terms of the GNU Affero General Public License as published by
112 the Free Software Foundation, either version 3 of the License, or
113 (at your option) any later version.
115 GNU Affero Emacs is distributed in the hope that it will be useful,
116 but WITHOUT ANY WARRANTY; without even the implied warranty of
117 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
118 GNU Affero General Public License for more details.
120 You should have received a copy of the GNU Affero General Public License
121 along with challenge-bot. If not, see <http://www.gnu.org/licenses/>.