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 2024-08-29 15:31:13 -04:00
parent ea8a583507
commit d40a3decc9
3 changed files with 137 additions and 93 deletions

View file

@ -199,103 +199,122 @@ module cut_move(x, y, w, h) {
// ===== Modules ===== // // ===== Modules ===== //
module profile_base() { /**
polygon([ *@summary Create the base of a gridfinity bin, or use it for a custom object.
[0,0], * @param length X,Y size of a single Gridfinity base.
[0,h_base], */
[r_base,h_base], module gridfinityBase(gx, gy, length, dx, dy, hole_options=bundle_hole_options(), off=0, final_cut=true, only_corners=false) {
[r_base-r_c2,h_base-r_c2], assert(
[r_base-r_c2,r_c1], is_num(gx) &&
[r_base-r_c2-r_c1,0] is_num(gy) &&
]); is_num(length) &&
} is_num(dx) &&
is_num(dy) &&
is_bool(final_cut) &&
is_bool(only_corners)
);
module gridfinityBase(gx, gy, l, dx, dy, hole_options=bundle_hole_options(), off=0, final_cut=true, only_corners=false) {
dbnxt = [for (i=[1:5]) if (abs(gx*i)%1 < 0.001 || abs(gx*i)%1 > 0.999) i]; dbnxt = [for (i=[1:5]) if (abs(gx*i)%1 < 0.001 || abs(gx*i)%1 > 0.999) i];
dbnyt = [for (i=[1:5]) if (abs(gy*i)%1 < 0.001 || abs(gy*i)%1 > 0.999) i]; dbnyt = [for (i=[1:5]) if (abs(gy*i)%1 < 0.001 || abs(gy*i)%1 > 0.999) i];
dbnx = 1/(dx==0 ? len(dbnxt) > 0 ? dbnxt[0] : 1 : round(dx)); dbnx = 1/(dx != 0 ? round(dx) : (len(dbnxt) > 0 ? dbnxt[0] : 1));
dbny = 1/(dy==0 ? len(dbnyt) > 0 ? dbnyt[0] : 1 : round(dy)); dbny = 1/(dy != 0 ? round(dy) : (len(dbnyt) > 0 ? dbnyt[0] : 1));
xx = gx*l-0.5;
yy = gy*l-0.5;
if (final_cut) // Final size in number of bases
translate([0,0,h_base]) grid_size = [gx/dbnx, gy/dbny];
rounded_rectangle(xx+0.002, yy+0.002, h_bot/1.5, r_fo1+0.001);
intersection(){ // Per spec, there's a 0.5mm gap between each base,
if (final_cut) // But that needs to be scaled based on everything else.
translate([0,0,-1]) individual_base_size_mm = [dbnx, dbny] * BASE_SIZE;
rounded_rectangle(xx+0.005, yy+0.005, h_base+h_bot/2*10, r_fo1+0.001); base_center_distance_mm = [dbnx, dbny] * length;
gap_mm = base_center_distance_mm - individual_base_size_mm;
if(only_corners) { // Final size of the base top. In mm.
difference(){ grid_size_mm = [
pattern_linear(gx/dbnx, gy/dbny, dbnx*l, dbny*l) base_center_distance_mm.x * grid_size.x,
block_base(gx, gy, l, dbnx, dbny, bundle_hole_options(), off); base_center_distance_mm.y * grid_size.y,
] - gap_mm;
copy_mirror([0, 1, 0]) { if (final_cut) {
copy_mirror([1, 0, 0]) { translate([0, 0, h_base-TOLLERANCE])
translate([ rounded_square([grid_size_mm.x, grid_size_mm.y, h_bot], BASE_OUTSIDE_RADIUS, center=true);
(gx/2)*l_grid - d_hole_from_side, }
(gy/2) * l_grid - d_hole_from_side,
0 if(only_corners) {
]) difference(){
block_base_hole(hole_options, off); pattern_linear(grid_size.x, grid_size.y, base_center_distance_mm.x, base_center_distance_mm.y)
} block_base(bundle_hole_options(), 0, individual_base_size_mm);
copy_mirror([0, 1, 0]) {
copy_mirror([1, 0, 0]) {
translate([
grid_size_mm.x/2 - HOLE_DISTANCE_FROM_BOTTOM_EDGE - BASE_PROFILE_MAX.x,
grid_size_mm.y/2 - HOLE_DISTANCE_FROM_BOTTOM_EDGE - BASE_PROFILE_MAX.x,
0
])
block_base_hole(hole_options, off);
} }
} }
} }
else { }
pattern_linear(gx/dbnx, gy/dbny, dbnx*l, dbny*l) else {
block_base(gx, gy, l, dbnx, dbny, hole_options, off); pattern_linear(grid_size.x, grid_size.y, base_center_distance_mm.x, base_center_distance_mm.y)
} block_base(hole_options, off, individual_base_size_mm);
} }
} }
/** /**
* @brief A single Gridfinity base. With holes (if set). * @brief A single Gridfinity base. With holes (if set).
* @param gx
* @param gy
* @param l
* @param dbnx
* @param dbny
* @param hole_options @see block_base_hole.hole_options * @param hole_options @see block_base_hole.hole_options
* @param off * @param off
* @param size [x, y] size of a single base. Only set if deviating from the standard!
*/ */
module block_base(gx, gy, l, dbnx, dbny, hole_options, off) { module block_base(hole_options, off=0, size=[BASE_SIZE, BASE_SIZE]) {
assert(is_list(size) && len(size) == 2);
// How far, in the +x direction,
// the profile needs to be from it's [0, 0] point
// such that when swept by 90 degrees to produce a corner,
// the outside edge has the desired radius.
translation_x = BASE_OUTSIDE_RADIUS - BASE_PROFILE_MAX.x;
outer_diameter = [2*BASE_OUTSIDE_RADIUS, 2*BASE_OUTSIDE_RADIUS];
base_profile_size = size - outer_diameter;
base_bottom_size = base_profile_size + [2*translation_x, 2*translation_x];
assert(base_profile_size.x > 0 && base_profile_size.y > 0,
str("Minimum size of a single base must be greater than ", outer_diameter)
);
render(convexity = 2) render(convexity = 2)
difference() { difference() {
block_base_solid(dbnx, dbny, l, off); union() {
sweep_rounded(base_profile_size.x, base_profile_size.y)
translate([translation_x, 0, 0])
polygon(BASE_PROFILE);
pattern_circular(abs(l-d_hole_from_side/2)<0.001?1:4) rounded_square(
translate([l/2-d_hole_from_side, l/2-d_hole_from_side, 0]) [
block_base_hole(hole_options, off); base_bottom_size.x + TOLLERANCE,
} base_bottom_size.y + TOLLERANCE,
} BASE_PROFILE_MAX.y
],
/** translation_x,
* @brief A gridfinity base with no holes. center=true
* @details Used as the "base" with holes removed from it later. );
* @param dbnx
* @param dbny
* @param l
* @param o
*/
module block_base_solid(dbnx, dbny, l, o) {
xx = dbnx*l-0.05;
yy = dbny*l-0.05;
oo = (o/2)*(sqrt(2)-1);
translate([0,0,h_base])
mirror([0,0,1])
union() {
hull() {
rounded_rectangle(xx-2*r_c2-2*r_c1+o, yy-2*r_c2-2*r_c1+o, h_base+oo, r_fo3);
rounded_rectangle(xx-2*r_c2+o, yy-2*r_c2+o, h_base-r_c1+oo, r_fo2);
} }
translate([0,0,oo])
hull() { // 4 holes
rounded_rectangle(xx-2*r_c2+o, yy-2*r_c2+o, r_c2, r_fo2); // Need this fancy code to support refined holes and non-square bases.
mirror([0,0,1]) for(a=[0:90:270]){
rounded_rectangle(xx+o, yy+o, h_bot/2+abs(10*o), r_fo1); // i and j represent the 4 quadrants.
// The +1 is used to keep any values from being exactly 0.
j = sign(sin(a+1));
i = sign(cos(a+1));
translate([
i * (base_bottom_size.x/2 - HOLE_DISTANCE_FROM_BOTTOM_EDGE),
j * (base_bottom_size.y/2 - HOLE_DISTANCE_FROM_BOTTOM_EDGE),
0])
rotate([0, 0, a])
block_base_hole(hole_options, off);
} }
} }
} }

View file

@ -72,13 +72,20 @@ else gridfinityVase(); // Generate the bin
// ===== CONSTRUCTION ===== // // ===== CONSTRUCTION ===== //
//Deprecated Variables
r_fo2 = 3.2 / 2; // outside radii 2
r_fo3 = 1.6 / 2; // outside radii 3
r_c2 = 2.4; // upper base chamfer "radius"
d_hole = 26; // center-to-center distance between holes
//End Deprecated Variables
d_bottom = layer*(max(bottom_layer,1)); d_bottom = layer*(max(bottom_layer,1));
x_l = l_grid/2; x_l = l_grid/2;
dht = (gridz_define==0)?gridz*7 : (gridz_define==1)?h_bot+gridz+h_base : gridz-(enable_lip?3.8:0); dht = (gridz_define==0)?gridz*7 : (gridz_define==1)?h_bot+gridz+h_base : gridz-(enable_lip?3.8:0);
d_height = (enable_zsnap?((abs(dht)%7==0)?dht:dht+7-abs(dht)%7):dht)-h_base; d_height = (enable_zsnap?((abs(dht)%7==0)?dht:dht+7-abs(dht)%7):dht)-h_base;
d_fo1 = 2*r_fo1; d_fo1 = 2*+BASE_OUTSIDE_RADIUS;
f2c = sqrt(2)*(sqrt(2)-1); // fillet to chamfer ratio f2c = sqrt(2)*(sqrt(2)-1); // fillet to chamfer ratio
me = ((gridx*l_grid-0.5)/n_divx)-nozzle*4-d_fo1-12.7-4; me = ((gridx*l_grid-0.5)/n_divx)-nozzle*4-d_fo1-12.7-4;
@ -161,7 +168,7 @@ module gridfinityBaseVase() {
intersection() { intersection() {
block_base_blank(0); block_base_blank(0);
translate([0,0,-h_base-1]) translate([0,0,-h_base-1])
rounded_square([l_grid-0.5-0.005, l_grid-0.5-0.005, h_base*10], r_fo1+0.001, center=true); rounded_square([l_grid-0.5-0.005, l_grid-0.5-0.005, h_base*10], BASE_OUTSIDE_RADIUS+0.001, center=true);
} }
translate([0,0,0.01]) translate([0,0,0.01])
difference() { difference() {
@ -229,7 +236,7 @@ module block_base_blank(o = 0) {
rounded_square(l_grid-o-0.05-2*r_c2, r_fo2, center=true); rounded_square(l_grid-o-0.05-2*r_c2, r_fo2, center=true);
mirror([0,0,1]) mirror([0,0,1])
linear_extrude(d_bottom) linear_extrude(d_bottom)
rounded_square(l_grid-o-0.05, r_fo1, center=true); rounded_square(l_grid-o-0.05, BASE_OUTSIDE_RADIUS, center=true);
} }
} }
} }

View file

@ -1,25 +1,15 @@
// height of the base
h_base = 5;
// lower base chamfer "radius" // lower base chamfer "radius"
r_c1 = 0.8; r_c1 = 0.8;
// upper base chamfer "radius"
r_c2 = 2.4;
// bottom thiccness of bin // bottom thiccness of bin
h_bot = 2.2; h_bot = 2.2;
// outside radii 1
r_fo1 = 7.5 / 2;
// outside radii 2
r_fo2 = 3.2 / 2;
// outside radii 3
r_fo3 = 1.6 / 2;
// length of a grid unit // length of a grid unit
l_grid = 42; l_grid = 42;
// Outside rounded radius of bin // Outside rounded radius of bin
// Per spec, matches radius of upper base section. // Per spec, matches radius of upper base section.
r_base = r_fo1; r_base = 7.5 / 2;
// Tollerance to make sure cuts don't leave a sliver behind, // Tollerance to make sure cuts don't leave a sliver behind,
// and that items are properly connected to each other. // and that items are properly connected to each other.
@ -35,11 +25,12 @@ SCREW_HOLE_RADIUS = 3 / 2;
MAGNET_HOLE_RADIUS = 6.5 / 2; MAGNET_HOLE_RADIUS = 6.5 / 2;
MAGNET_HOLE_DEPTH = MAGNET_HEIGHT + (LAYER_HEIGHT * 2); MAGNET_HOLE_DEPTH = MAGNET_HEIGHT + (LAYER_HEIGHT * 2);
// center-to-center distance between holes
d_hole = 26;
// distance of hole from side of bin // distance of hole from side of bin
d_hole_from_side=8; d_hole_from_side=8;
// Based on https://gridfinity.xyz/specification/
HOLE_DISTANCE_FROM_BOTTOM_EDGE = 4.8;
// Meassured diameter in Fusion360. // Meassured diameter in Fusion360.
// Smaller than the magnet to keep it squeezed. // Smaller than the magnet to keep it squeezed.
REFINED_HOLE_RADIUS = 5.86 / 2; REFINED_HOLE_RADIUS = 5.86 / 2;
@ -62,6 +53,7 @@ CHAMFER_ANGLE = 45;
BASEPLATE_SCREW_COUNTERSINK_ADDITIONAL_RADIUS = 5/2; BASEPLATE_SCREW_COUNTERSINK_ADDITIONAL_RADIUS = 5/2;
BASEPLATE_SCREW_COUNTERBORE_RADIUS = 5.5/2; BASEPLATE_SCREW_COUNTERBORE_RADIUS = 5.5/2;
BASEPLATE_SCREW_COUNTERBORE_HEIGHT = 3; BASEPLATE_SCREW_COUNTERBORE_HEIGHT = 3;
// **************************************** // ****************************************
// top edge fillet radius // top edge fillet radius
@ -109,6 +101,34 @@ stacking_lip_support_wall_height_mm = 1.2;
stacking_lip_support_height_mm = stacking_lip_support_height_mm =
stacking_lip_support_wall_height_mm + d_wall2; stacking_lip_support_wall_height_mm + d_wall2;
// ****************************************
// Base constants
// Based on https://gridfinity.xyz/specification/
// ****************************************
BASE_OUTSIDE_RADIUS = r_base;
BASE_PROFILE = [
[0, 0], // Innermost bottom point
[0.8, 0.8], // Up and out at a 45 degree angle
[0.8, (0.8+1.8)], // Straight up
[(0.8+2.15), (0.8+1.8+2.15)], // Up and out at a 45 degree angle
[0, (0.8+1.8+2.15)], // Go in to form a solid polygon
[0, 0] //Back to start
];
// Maximum [x,y] values/size of the base.
BASE_PROFILE_MAX = BASE_PROFILE[3];
// Each unit's base is 41.5mm x 41.5mm
// Leaving 0.5mm gap with an l_grid of 42
BASE_SIZE = 41.5;
/**
* @summary Height of the raw base
*/
h_base = BASE_PROFILE_MAX.y;
// **************************************** // ****************************************
// Baseplate constants // Baseplate constants
// Based on https://gridfinity.xyz/specification/ // Based on https://gridfinity.xyz/specification/
@ -159,8 +179,6 @@ bp_rcut_depth = 2;
// **************************************** // ****************************************
// Baseplate clearance offset
bp_xy_clearance = 0.5;
// radius of cutout for skeletonized baseplate // radius of cutout for skeletonized baseplate
r_skel = 2; r_skel = 2;
// minimum baseplate thickness (when skeletonized) // minimum baseplate thickness (when skeletonized)