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x_holes = 6; |
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x_holes = 6; |
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y_holes = 8; |
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y_holes = 8; |
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pedestal_height = 9; // designed for use the MLAB standard 20mm screws. |
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pedestal_height = 9; // designed for use the MLAB standard 20mm screws. |
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MLAB_grid = 10.16; |
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MLAB_grid = 10.16; |
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thickness = 1; // thickness of bottom belt |
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thickness = 1; // thickness of bottom belt |
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pile_radius = 4; // radius of pile around screw |
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pile_radius = 4; // radius of pile around screw |
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x_size = x_holes * MLAB_grid ; |
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x_size = x_holes * MLAB_grid ; |
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y_size = y_holes * MLAB_grid ; |
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y_size = y_holes * MLAB_grid ; |
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mount_hole = 3.5; |
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mount_hole = 3.5; |
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//nut_size = 6.8; //size suitable for PLA material |
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//nut_size = 6.8; //size suitable for PLA material |
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nut_size = 6.7; //size suitable for ABS material |
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nut_size = 6.7; //size suitable for ABS material |
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clear = 0.175; |
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clear = 0.175; |
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MLAB_grid_xoffset = MLAB_grid/2; |
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MLAB_grid_xoffset = MLAB_grid/2; |
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MLAB_grid_yoffset = MLAB_grid/2; |
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MLAB_grid_yoffset = MLAB_grid/2; |
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grid_list = [for (j = [MLAB_grid_xoffset : MLAB_grid: x_size], i = [MLAB_grid_yoffset :MLAB_grid: y_size]) |
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grid_list = [for (j = [MLAB_grid_xoffset : MLAB_grid: x_size], i = [MLAB_grid_yoffset :MLAB_grid: y_size]) |
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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] ]; |
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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] ]; |
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//------------parameters--------------------------- |
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//------------ Safety grid parameters--------------------------- |
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nY = 8; |
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nY = 8; |
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nX = 6; |
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nX = 6; |
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meshX=x_size-4*pile_radius; |
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meshX=x_size-4*pile_radius; |
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meshY=y_size-4*pile_radius; |
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meshY=y_size-4*pile_radius; |
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// width of solid part of grid |
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// width of solid part of grid |
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meshSolid=1.2; |
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meshSolid=1.2; |
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// width of blank part of grid |
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//meshSpaceX=(y_size-4*pile_radius)/8; |
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//meshSpaceY=(y_size-4*pile_radius)/8; |
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// thickness in Z direction |
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//------------------------------------------------- |
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//nX=meshX/(meshSolid+meshSpaceX); |
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//nY=meshY/(meshSolid+meshSpaceY); |
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meshSpaceX = (meshX - meshSolid*nX)/nX; |
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meshSpaceX = (meshX - meshSolid*nX)/nX; |
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meshSpaceY = (meshY - meshSolid*nY)/nY; |
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meshSpaceY = (meshY - meshSolid*nY)/nY; |
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difference () { |
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difference () { |
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union () { |
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union () { |
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for (j = grid_list) { |
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for (j = grid_list) { |
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translate (concat(j, [0])) |
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translate (concat(j, [0])) |
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cylinder (h = pedestal_height, r= pile_radius, $fn=20); |
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cylinder (h = pedestal_height, r= pile_radius, $fn=20); |
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} |
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} |
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translate ([MLAB_grid_xoffset , MLAB_grid_yoffset , 0]) |
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translate ([MLAB_grid_xoffset , MLAB_grid_yoffset , 0]) |
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minkowski() { |
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minkowski() { |
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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 |
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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 |
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cylinder(r=pile_radius,h=0.1); |
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cylinder(r=pile_radius,h=0.1); |
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} |
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} |
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} |
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} |
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translate ([2*pile_radius, 2*pile_radius, 0]) // central hole in module support |
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translate ([2*pile_radius, 2*pile_radius, 0]) // central hole in module support |
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cube([x_size-4*pile_radius, y_size-4*pile_radius, 2*thickness]); |
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cube([x_size-4*pile_radius, y_size-4*pile_radius, 2*thickness]); |
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// MLAB grid holes |
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// MLAB grid holes |
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for (j = grid_list) { |
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for (j = grid_list) { |
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translate (concat(j, [0])) |
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translate (concat(j, [0])) |
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cylinder (h = 3, r= (nut_size+clear)/2, $fn=6); |
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cylinder (h = 3, r= (nut_size+clear)/2, $fn=6); |
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translate (concat(j, [3.2])) // one solid layer for slicer (the holes will be pierced on demand ) |
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translate (concat(j, [3.2])) // one solid layer for slicer (the holes will be pierced on demand ) |
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cylinder (h = pedestal_height, r= mount_hole/2, $fn=10); |
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cylinder (h = pedestal_height, r= mount_hole/2, $fn=10); |
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} |
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} |
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} |
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} |
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translate ([2*pile_radius, 2*pile_radius, 0]) // central hole in module support |
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translate ([2*pile_radius, 2*pile_radius, 0]) // central hole in module support |
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union() |
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union() |
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{ |
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{ |
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for (i=[1:nX-1]) { |
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for (i=[1:nX-1]) { |
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translate([i*(meshSolid+meshSpaceX) - meshSolid/2,0,0]) cube(size=[meshSolid, meshY, thickness],center=false); |
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translate([i*(meshSolid+meshSpaceX) - meshSolid/2,0,0]) cube(size=[meshSolid, meshY, thickness],center=false); |
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} |
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} |
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for (i=[1:nY-1]) { |
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for (i=[1:nY-1]) { |
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translate([0,i*(meshSolid+meshSpaceY) - meshSolid/2,0]) cube(size=[meshX, meshSolid, thickness],center=false); |
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translate([0,i*(meshSolid+meshSpaceY) - meshSolid/2,0]) cube(size=[meshX, meshSolid, thickness],center=false); |
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} |
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} |
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} |
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} |
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