Rev Author Line No. Line
4122 kaklik 1  
2 x_holes = 4;
3 y_holes = 4;
4 MLAB_grid = 10.16;
5 pile_radius = 4;
4160 kaklik 6 pedestal_height = 12; // designed for use the MLAB standard 20mm screws.
4122 kaklik 7 x_size = x_holes * MLAB_grid ;
8 y_size = y_holes * MLAB_grid ;
9 mount_hole = 3.5;
10 //nut_size = 6.8; //size suitable for PLA material
11 nut_size = 6.7; //size suitable for ABS material
12 clear = 0.175;
13  
14  
15 thickness = 1;
16  
17 MLAB_grid_xoffset = MLAB_grid/2;
18 MLAB_grid_yoffset = MLAB_grid/2;
19  
20 grid_list = [for (j = [MLAB_grid_xoffset : MLAB_grid: x_size], i = [MLAB_grid_yoffset :MLAB_grid: y_size])
4312 kaklik 21 if ((j>(x_size-10) && i>(y_size-10)) || (j<10 && i<10) || (j<10 && i>(y_size-10)) || (j>(x_size-10) && i<10) ) [j, i] ];
4122 kaklik 22  
23  
24 difference () {
25 union () {
26 for (j = grid_list) {
27 translate (concat(j, [0]))
28 cylinder (h = pedestal_height, r= pile_radius, $fn=20);
29 }
30  
31 translate ([MLAB_grid_xoffset , MLAB_grid_yoffset , 0])
32 minkowski() {
33 cube([x_size - 2*(MLAB_grid/2 - pile_radius) - 2*pile_radius, y_size - 2*(MLAB_grid/2 - pile_radius) - 2*pile_radius, thickness]); // base plastics brick
34 cylinder(r=pile_radius,h=0.1);
35 }
36 }
37  
38 translate ([2*pile_radius, 2*pile_radius, 0]) // central hole in module support
39 cube([x_size-4*pile_radius, y_size-4*pile_radius, 2*thickness]);
40  
41 // MLAB grid holes
42 for (j = grid_list) {
43 translate (concat(j, [0]))
44 cylinder (h = 3, r= (nut_size+clear)/2, $fn=6);
45 translate (concat(j, [3.2])) // one solid layer for slicer (the holes will be pierced on demand )
46 cylinder (h = pedestal_height, r= mount_hole/2, $fn=10);
47 }
48 }
49