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  
4519 kaklik 19  
4409 kaklik 20 MLAB_grid_xoffset = MLAB_grid/2;
21 MLAB_grid_yoffset = MLAB_grid/2;
22  
23 grid_list = [for (j = [MLAB_grid_xoffset : MLAB_grid: x_size], i = [MLAB_grid_yoffset :MLAB_grid: y_size])
24 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] ];
25  
26  
4519 kaklik 27 //------------parameters---------------------------
28  
29 nY = 8;
30 nX = 6;
31  
32  
33 meshX=x_size-4*pile_radius;
34 meshY=y_size-4*pile_radius;
35  
36 // width of solid part of grid
37 meshSolid=1.2;
38 // width of blank part of grid
39 //meshSpaceX=(y_size-4*pile_radius)/8;
40 //meshSpaceY=(y_size-4*pile_radius)/8;
41 // thickness in Z direction
42  
43  
44 //-------------------------------------------------
45 //nX=meshX/(meshSolid+meshSpaceX);
46 //nY=meshY/(meshSolid+meshSpaceY);
47  
48 meshSpaceX = (meshX - meshSolid*nX)/nX;
49 meshSpaceY = (meshY - meshSolid*nY)/nY;
50  
51  
4409 kaklik 52 difference () {
53 union () {
54 for (j = grid_list) {
55 translate (concat(j, [0]))
56 cylinder (h = pedestal_height, r= pile_radius, $fn=20);
57 }
58  
59 translate ([MLAB_grid_xoffset , MLAB_grid_yoffset , 0])
60 minkowski() {
61 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
62 cylinder(r=pile_radius,h=0.1);
63 }
64 }
65  
66 translate ([2*pile_radius, 2*pile_radius, 0]) // central hole in module support
67 cube([x_size-4*pile_radius, y_size-4*pile_radius, 2*thickness]);
68  
69 // MLAB grid holes
70 for (j = grid_list) {
71 translate (concat(j, [0]))
72 cylinder (h = 3, r= (nut_size+clear)/2, $fn=6);
73 translate (concat(j, [3.2])) // one solid layer for slicer (the holes will be pierced on demand )
74 cylinder (h = pedestal_height, r= mount_hole/2, $fn=10);
75 }
4519 kaklik 76  
77  
4409 kaklik 78 }
79  
4519 kaklik 80 translate ([2*pile_radius, 2*pile_radius, 0]) // central hole in module support
81 union()
82 {
83 for (i=[1:nX-1]) {
84 translate([i*(meshSolid+meshSpaceX) - meshSolid/2,0,0]) cube(size=[meshSolid, meshY, thickness],center=false);
85 }
86  
87 for (i=[1:nY-1]) {
88 translate([0,i*(meshSolid+meshSpaceY) - meshSolid/2,0]) cube(size=[meshX, meshSolid, thickness],center=false);
89  
90 }
91 }
92