forked from SolidCode/MCAD
-
Notifications
You must be signed in to change notification settings - Fork 193
/
lego_compatibility.scad
157 lines (140 loc) · 6.63 KB
/
lego_compatibility.scad
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
// This file is placed under the public domain
// from: http://www.thingiverse.com/thing:9512
// Author: nefercheprure
// Examples:
// standard LEGO 2x1 tile has no pin
// block(1,2,1/3,reinforcement=false,flat_top=true);
// standard LEGO 2x1 flat has pin
// block(1,2,1/3,reinforcement=true);
// standard LEGO 2x1 brick has pin
// block(1,2,1,reinforcement=true);
// standard LEGO 2x1 brick without pin
// block(1,2,1,reinforcement=false);
// standard LEGO 2x1x5 brick has no pin and has hollow knobs
// block(1,2,5,reinforcement=false,hollow_knob=true);
knob_diameter=4.8; //knobs on top of blocks
knob_height=2;
knob_spacing=8.0;
wall_thickness=1.45;
roof_thickness=1.05;
block_height=9.5;
pin_diameter=3; //pin for bottom blocks with width or length of 1
post_diameter=6.5;
reinforcing_width=1.5;
axle_spline_width=2.0;
axle_diameter=5;
cylinder_precision=0.5;
/* EXAMPLES:
block(2,1,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=true);
translate([50,-10,0])
block(1,2,1/3,axle_hole=false,circular_hole=true,reinforcement=false,hollow_knob=true,flat_top=true);
translate([10,0,0])
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=true);
translate([30,0,0])
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=false,flat_top=false);
translate([50,0,0])
block(2,2,1/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=false);
translate([0,20,0])
block(3,2,2/3,axle_hole=false,circular_hole=true,reinforcement=true,hollow_knob=true,flat_top=false);
translate([20,20,0])
block(3,2,1,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=false,flat_top=false);
translate([40,20,0])
block(3,2,1/3,axle_hole=false,circular_hole=false,reinforcement=false,hollow_knob=false,flat_top=false);
translate([0,-10,0])
block(1,5,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=false,flat_top=false);
translate([0,-20,0])
block(1,5,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=true,flat_top=false);
translate([0,-30,0])
block(1,5,1/3,axle_hole=true,circular_hole=false,reinforcement=true,hollow_knob=true,flat_top=true);
//*/
module block(width,length,height,axle_hole=false,reinforcement=false, hollow_knob=false, flat_top=false, circular_hole=false, solid_bottom=true, center=false) {
overall_length=(length-1)*knob_spacing+knob_diameter+wall_thickness*2;
overall_width=(width-1)*knob_spacing+knob_diameter+wall_thickness*2;
center= center==true ? 1 : 0;
translate(center*[-overall_length/2, -overall_width/2, 0])
union() {
difference() {
union() {
// body:
cube([overall_length,overall_width,height*block_height]);
// knobs:
if (flat_top != true)
translate([knob_diameter/2+wall_thickness,knob_diameter/2+wall_thickness,0])
for (ycount=[0:width-1])
for (xcount=[0:length-1]) {
translate([xcount*knob_spacing,ycount*knob_spacing,0])
difference() {
cylinder(r=knob_diameter/2,h=block_height*height+knob_height,$fs=cylinder_precision);
if (hollow_knob==true)
translate([0,0,-roof_thickness])
cylinder(r=pin_diameter/2,h=block_height*height+knob_height+2*roof_thickness,$fs=cylinder_precision);
}
}
}
// hollow bottom:
if (solid_bottom == false)
translate([wall_thickness,wall_thickness,-roof_thickness]) cube([overall_length-wall_thickness*2,overall_width-wall_thickness*2,block_height*height]);
// flat_top -> groove around bottom
if (flat_top == true) {
translate([-wall_thickness/2,-wall_thickness*2/3,-wall_thickness/2])
cube([overall_length+wall_thickness,wall_thickness,wall_thickness]);
translate([-wall_thickness/2,overall_width-wall_thickness/3,-wall_thickness/2])
cube([overall_length+wall_thickness,wall_thickness,wall_thickness]);
translate([-wall_thickness*2/3,-wall_thickness/2,-wall_thickness/2])
cube([wall_thickness,overall_width+wall_thickness,wall_thickness]);
translate([overall_length-wall_thickness/3,0,-wall_thickness/2])
cube([wall_thickness,overall_width+wall_thickness,wall_thickness]);
}
if (axle_hole==true)
if (width>1 && length>1) for (ycount=[1:width-1])
for (xcount=[1:length-1])
translate([xcount*knob_spacing,ycount*knob_spacing,roof_thickness]) axle(height);
if (circular_hole==true)
if (width>1 && length>1) for (ycount=[1:width-1])
for (xcount=[1:length-1])
translate([xcount*knob_spacing,ycount*knob_spacing,roof_thickness])
cylinder(r=knob_diameter/2, h=height*block_height+roof_thickness/4,$fs=cylinder_precision);
}
if (reinforcement==true && width>1 && length>1)
difference() {
for (ycount=[1:width-1])
for (xcount=[1:length-1])
translate([xcount*knob_spacing,ycount*knob_spacing,0]) reinforcement(height);
for (ycount=[1:width-1])
for (xcount=[1:length-1])
translate([xcount*knob_spacing,ycount*knob_spacing,-roof_thickness/2]) cylinder(r=knob_diameter/2, h=height*block_height+roof_thickness, $fs=cylinder_precision);
}
// posts:
if (solid_bottom == false)
if (width>1 && length>1) for (ycount=[1:width-1])
for (xcount=[1:length-1])
translate([xcount*knob_spacing,ycount*knob_spacing,0]) post(height);
if (reinforcement == true && width==1 && length!=1)
for (xcount=[1:length-1])
translate([xcount*knob_spacing,overall_width/2,0]) cylinder(r=pin_diameter/2,h=block_height*height,$fs=cylinder_precision);
if (reinforcement == true && length==1 && width!=1)
for (ycount=[1:width-1])
translate([overall_length/2,ycount*knob_spacing,0]) cylinder(r=pin_diameter/2,h=block_height*height,$fs=cylinder_precision);
}
}
module post(height) {
difference() {
cylinder(r=post_diameter/2, h=height*block_height-roof_thickness/2,$fs=cylinder_precision);
translate([0,0,-roof_thickness/2])
cylinder(r=knob_diameter/2, h=height*block_height+roof_thickness/4,$fs=cylinder_precision);
}
}
module reinforcement(height) {
union() {
translate([0,0,height*block_height/2]) union() {
cube([reinforcing_width,knob_spacing+knob_diameter+wall_thickness/2,height*block_height],center=true);
rotate(v=[0,0,1],a=90) cube([reinforcing_width,knob_spacing+knob_diameter+wall_thickness/2,height*block_height], center=true);
}
}
}
module axle(height) {
translate([0,0,height*block_height/2]) union() {
cube([axle_diameter,axle_spline_width,height*block_height],center=true);
cube([axle_spline_width,axle_diameter,height*block_height],center=true);
}
}