Rev Author Line No. Line
4409 kaklik 1  
2 x_holes = 6;
3 y_holes = 8;
4 pedestal_height = 9; // designed for use the MLAB standard 20mm screws.
5  
6 MLAB_grid = 10.16;
7 thickness = 1; // thickness of bottom belt
8 pile_radius = 4; // radius of pile around screw
9 x_size = x_holes * MLAB_grid ;
10 y_size = y_holes * MLAB_grid ;
11 mount_hole = 3.5;
12 //nut_size = 6.8; //size suitable for PLA material
13 nut_size = 6.7; //size suitable for ABS material
14 clear = 0.175;
15  
16  
17  
18  
19 MLAB_grid_xoffset = MLAB_grid/2;
20 MLAB_grid_yoffset = MLAB_grid/2;
21  
22 grid_list = [for (j = [MLAB_grid_xoffset : MLAB_grid: x_size], i = [MLAB_grid_yoffset :MLAB_grid: y_size])
23 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] ];
24  
25  
26 difference () {
27 union () {
28 for (j = grid_list) {
29 translate (concat(j, [0]))
30 cylinder (h = pedestal_height, r= pile_radius, $fn=20);
31 }
32  
33 translate ([MLAB_grid_xoffset , MLAB_grid_yoffset , 0])
34 minkowski() {
35 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
36 cylinder(r=pile_radius,h=0.1);
37 }
38 }
39  
40 translate ([2*pile_radius, 2*pile_radius, 0]) // central hole in module support
41 cube([x_size-4*pile_radius, y_size-4*pile_radius, 2*thickness]);
42  
43 // MLAB grid holes
44 for (j = grid_list) {
45 translate (concat(j, [0]))
46 cylinder (h = 3, r= (nut_size+clear)/2, $fn=6);
47 translate (concat(j, [3.2])) // one solid layer for slicer (the holes will be pierced on demand )
48 cylinder (h = pedestal_height, r= mount_hole/2, $fn=10);
49 }
50 }
51