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https://github.com/kennetek/gridfinity-rebuilt-openscad.git
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Define the profile of the base by sweeping a polygon.
This is the same approach taken for the stacking lip and baseplate.
This commit is contained in:
Arthur Moore
parent
ea8a583507
commit
d40a3decc9
3 changed files with 137 additions and 93 deletions
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@ -199,103 +199,122 @@ module cut_move(x, y, w, h) {
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// ===== Modules ===== //
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module profile_base() {
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polygon([
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[0,0],
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[0,h_base],
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[r_base,h_base],
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[r_base-r_c2,h_base-r_c2],
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[r_base-r_c2,r_c1],
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[r_base-r_c2-r_c1,0]
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]);
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}
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/**
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*@summary Create the base of a gridfinity bin, or use it for a custom object.
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* @param length X,Y size of a single Gridfinity base.
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*/
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module gridfinityBase(gx, gy, length, dx, dy, hole_options=bundle_hole_options(), off=0, final_cut=true, only_corners=false) {
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assert(
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is_num(gx) &&
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is_num(gy) &&
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is_num(length) &&
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is_num(dx) &&
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is_num(dy) &&
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is_bool(final_cut) &&
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is_bool(only_corners)
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);
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module gridfinityBase(gx, gy, l, dx, dy, hole_options=bundle_hole_options(), off=0, final_cut=true, only_corners=false) {
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dbnxt = [for (i=[1:5]) if (abs(gx*i)%1 < 0.001 || abs(gx*i)%1 > 0.999) i];
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dbnyt = [for (i=[1:5]) if (abs(gy*i)%1 < 0.001 || abs(gy*i)%1 > 0.999) i];
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dbnx = 1/(dx==0 ? len(dbnxt) > 0 ? dbnxt[0] : 1 : round(dx));
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dbny = 1/(dy==0 ? len(dbnyt) > 0 ? dbnyt[0] : 1 : round(dy));
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xx = gx*l-0.5;
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yy = gy*l-0.5;
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dbnx = 1/(dx != 0 ? round(dx) : (len(dbnxt) > 0 ? dbnxt[0] : 1));
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dbny = 1/(dy != 0 ? round(dy) : (len(dbnyt) > 0 ? dbnyt[0] : 1));
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if (final_cut)
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translate([0,0,h_base])
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rounded_rectangle(xx+0.002, yy+0.002, h_bot/1.5, r_fo1+0.001);
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// Final size in number of bases
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grid_size = [gx/dbnx, gy/dbny];
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intersection(){
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if (final_cut)
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translate([0,0,-1])
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rounded_rectangle(xx+0.005, yy+0.005, h_base+h_bot/2*10, r_fo1+0.001);
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// Per spec, there's a 0.5mm gap between each base,
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// But that needs to be scaled based on everything else.
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individual_base_size_mm = [dbnx, dbny] * BASE_SIZE;
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base_center_distance_mm = [dbnx, dbny] * length;
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gap_mm = base_center_distance_mm - individual_base_size_mm;
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if(only_corners) {
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difference(){
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pattern_linear(gx/dbnx, gy/dbny, dbnx*l, dbny*l)
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block_base(gx, gy, l, dbnx, dbny, bundle_hole_options(), off);
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// Final size of the base top. In mm.
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grid_size_mm = [
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base_center_distance_mm.x * grid_size.x,
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base_center_distance_mm.y * grid_size.y,
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] - gap_mm;
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copy_mirror([0, 1, 0]) {
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copy_mirror([1, 0, 0]) {
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translate([
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(gx/2)*l_grid - d_hole_from_side,
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(gy/2) * l_grid - d_hole_from_side,
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0
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])
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block_base_hole(hole_options, off);
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}
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if (final_cut) {
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translate([0, 0, h_base-TOLLERANCE])
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rounded_square([grid_size_mm.x, grid_size_mm.y, h_bot], BASE_OUTSIDE_RADIUS, center=true);
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}
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if(only_corners) {
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difference(){
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pattern_linear(grid_size.x, grid_size.y, base_center_distance_mm.x, base_center_distance_mm.y)
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block_base(bundle_hole_options(), 0, individual_base_size_mm);
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copy_mirror([0, 1, 0]) {
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copy_mirror([1, 0, 0]) {
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translate([
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grid_size_mm.x/2 - HOLE_DISTANCE_FROM_BOTTOM_EDGE - BASE_PROFILE_MAX.x,
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grid_size_mm.y/2 - HOLE_DISTANCE_FROM_BOTTOM_EDGE - BASE_PROFILE_MAX.x,
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0
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])
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block_base_hole(hole_options, off);
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}
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}
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}
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else {
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pattern_linear(gx/dbnx, gy/dbny, dbnx*l, dbny*l)
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block_base(gx, gy, l, dbnx, dbny, hole_options, off);
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}
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}
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else {
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pattern_linear(grid_size.x, grid_size.y, base_center_distance_mm.x, base_center_distance_mm.y)
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block_base(hole_options, off, individual_base_size_mm);
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}
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}
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/**
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* @brief A single Gridfinity base. With holes (if set).
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* @param gx
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* @param gy
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* @param l
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* @param dbnx
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* @param dbny
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* @param hole_options @see block_base_hole.hole_options
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* @param off
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* @param size [x, y] size of a single base. Only set if deviating from the standard!
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*/
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module block_base(gx, gy, l, dbnx, dbny, hole_options, off) {
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module block_base(hole_options, off=0, size=[BASE_SIZE, BASE_SIZE]) {
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assert(is_list(size) && len(size) == 2);
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// How far, in the +x direction,
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// the profile needs to be from it's [0, 0] point
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// such that when swept by 90 degrees to produce a corner,
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// the outside edge has the desired radius.
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translation_x = BASE_OUTSIDE_RADIUS - BASE_PROFILE_MAX.x;
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outer_diameter = [2*BASE_OUTSIDE_RADIUS, 2*BASE_OUTSIDE_RADIUS];
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base_profile_size = size - outer_diameter;
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base_bottom_size = base_profile_size + [2*translation_x, 2*translation_x];
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assert(base_profile_size.x > 0 && base_profile_size.y > 0,
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str("Minimum size of a single base must be greater than ", outer_diameter)
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);
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render(convexity = 2)
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difference() {
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block_base_solid(dbnx, dbny, l, off);
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union() {
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sweep_rounded(base_profile_size.x, base_profile_size.y)
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translate([translation_x, 0, 0])
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polygon(BASE_PROFILE);
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pattern_circular(abs(l-d_hole_from_side/2)<0.001?1:4)
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translate([l/2-d_hole_from_side, l/2-d_hole_from_side, 0])
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block_base_hole(hole_options, off);
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}
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}
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/**
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* @brief A gridfinity base with no holes.
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* @details Used as the "base" with holes removed from it later.
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* @param dbnx
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* @param dbny
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* @param l
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* @param o
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*/
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module block_base_solid(dbnx, dbny, l, o) {
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xx = dbnx*l-0.05;
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yy = dbny*l-0.05;
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oo = (o/2)*(sqrt(2)-1);
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translate([0,0,h_base])
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mirror([0,0,1])
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union() {
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hull() {
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rounded_rectangle(xx-2*r_c2-2*r_c1+o, yy-2*r_c2-2*r_c1+o, h_base+oo, r_fo3);
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rounded_rectangle(xx-2*r_c2+o, yy-2*r_c2+o, h_base-r_c1+oo, r_fo2);
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rounded_square(
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[
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base_bottom_size.x + TOLLERANCE,
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base_bottom_size.y + TOLLERANCE,
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BASE_PROFILE_MAX.y
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],
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translation_x,
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center=true
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);
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}
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translate([0,0,oo])
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hull() {
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rounded_rectangle(xx-2*r_c2+o, yy-2*r_c2+o, r_c2, r_fo2);
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mirror([0,0,1])
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rounded_rectangle(xx+o, yy+o, h_bot/2+abs(10*o), r_fo1);
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// 4 holes
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// Need this fancy code to support refined holes and non-square bases.
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for(a=[0:90:270]){
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// i and j represent the 4 quadrants.
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// The +1 is used to keep any values from being exactly 0.
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j = sign(sin(a+1));
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i = sign(cos(a+1));
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translate([
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i * (base_bottom_size.x/2 - HOLE_DISTANCE_FROM_BOTTOM_EDGE),
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j * (base_bottom_size.y/2 - HOLE_DISTANCE_FROM_BOTTOM_EDGE),
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0])
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rotate([0, 0, a])
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block_base_hole(hole_options, off);
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}
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}
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}
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@ -72,13 +72,20 @@ else gridfinityVase(); // Generate the bin
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// ===== CONSTRUCTION ===== //
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//Deprecated Variables
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r_fo2 = 3.2 / 2; // outside radii 2
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r_fo3 = 1.6 / 2; // outside radii 3
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r_c2 = 2.4; // upper base chamfer "radius"
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d_hole = 26; // center-to-center distance between holes
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//End Deprecated Variables
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d_bottom = layer*(max(bottom_layer,1));
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x_l = l_grid/2;
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dht = (gridz_define==0)?gridz*7 : (gridz_define==1)?h_bot+gridz+h_base : gridz-(enable_lip?3.8:0);
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d_height = (enable_zsnap?((abs(dht)%7==0)?dht:dht+7-abs(dht)%7):dht)-h_base;
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d_fo1 = 2*r_fo1;
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d_fo1 = 2*+BASE_OUTSIDE_RADIUS;
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f2c = sqrt(2)*(sqrt(2)-1); // fillet to chamfer ratio
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me = ((gridx*l_grid-0.5)/n_divx)-nozzle*4-d_fo1-12.7-4;
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@ -161,7 +168,7 @@ module gridfinityBaseVase() {
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intersection() {
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block_base_blank(0);
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translate([0,0,-h_base-1])
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rounded_square([l_grid-0.5-0.005, l_grid-0.5-0.005, h_base*10], r_fo1+0.001, center=true);
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rounded_square([l_grid-0.5-0.005, l_grid-0.5-0.005, h_base*10], BASE_OUTSIDE_RADIUS+0.001, center=true);
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}
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translate([0,0,0.01])
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difference() {
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@ -229,7 +236,7 @@ module block_base_blank(o = 0) {
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rounded_square(l_grid-o-0.05-2*r_c2, r_fo2, center=true);
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mirror([0,0,1])
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linear_extrude(d_bottom)
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rounded_square(l_grid-o-0.05, r_fo1, center=true);
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rounded_square(l_grid-o-0.05, BASE_OUTSIDE_RADIUS, center=true);
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}
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}
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}
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@ -1,25 +1,15 @@
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// height of the base
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h_base = 5;
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// lower base chamfer "radius"
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r_c1 = 0.8;
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// upper base chamfer "radius"
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r_c2 = 2.4;
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// bottom thiccness of bin
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h_bot = 2.2;
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// outside radii 1
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r_fo1 = 7.5 / 2;
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// outside radii 2
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r_fo2 = 3.2 / 2;
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// outside radii 3
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r_fo3 = 1.6 / 2;
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// length of a grid unit
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l_grid = 42;
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// Outside rounded radius of bin
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// Per spec, matches radius of upper base section.
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r_base = r_fo1;
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r_base = 7.5 / 2;
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// Tollerance to make sure cuts don't leave a sliver behind,
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// and that items are properly connected to each other.
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@ -35,11 +25,12 @@ SCREW_HOLE_RADIUS = 3 / 2;
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MAGNET_HOLE_RADIUS = 6.5 / 2;
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MAGNET_HOLE_DEPTH = MAGNET_HEIGHT + (LAYER_HEIGHT * 2);
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// center-to-center distance between holes
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d_hole = 26;
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// distance of hole from side of bin
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d_hole_from_side=8;
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// Based on https://gridfinity.xyz/specification/
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HOLE_DISTANCE_FROM_BOTTOM_EDGE = 4.8;
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// Meassured diameter in Fusion360.
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// Smaller than the magnet to keep it squeezed.
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REFINED_HOLE_RADIUS = 5.86 / 2;
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@ -62,6 +53,7 @@ CHAMFER_ANGLE = 45;
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BASEPLATE_SCREW_COUNTERSINK_ADDITIONAL_RADIUS = 5/2;
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BASEPLATE_SCREW_COUNTERBORE_RADIUS = 5.5/2;
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BASEPLATE_SCREW_COUNTERBORE_HEIGHT = 3;
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// ****************************************
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// top edge fillet radius
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@ -109,6 +101,34 @@ stacking_lip_support_wall_height_mm = 1.2;
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stacking_lip_support_height_mm =
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stacking_lip_support_wall_height_mm + d_wall2;
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// ****************************************
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// Base constants
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// Based on https://gridfinity.xyz/specification/
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// ****************************************
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BASE_OUTSIDE_RADIUS = r_base;
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BASE_PROFILE = [
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[0, 0], // Innermost bottom point
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[0.8, 0.8], // Up and out at a 45 degree angle
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[0.8, (0.8+1.8)], // Straight up
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[(0.8+2.15), (0.8+1.8+2.15)], // Up and out at a 45 degree angle
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[0, (0.8+1.8+2.15)], // Go in to form a solid polygon
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[0, 0] //Back to start
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];
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// Maximum [x,y] values/size of the base.
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BASE_PROFILE_MAX = BASE_PROFILE[3];
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// Each unit's base is 41.5mm x 41.5mm
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// Leaving 0.5mm gap with an l_grid of 42
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BASE_SIZE = 41.5;
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/**
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* @summary Height of the raw base
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*/
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h_base = BASE_PROFILE_MAX.y;
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// ****************************************
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// Baseplate constants
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// Based on https://gridfinity.xyz/specification/
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@ -159,8 +179,6 @@ bp_rcut_depth = 2;
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// ****************************************
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// Baseplate clearance offset
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bp_xy_clearance = 0.5;
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// radius of cutout for skeletonized baseplate
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r_skel = 2;
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// minimum baseplate thickness (when skeletonized)
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