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Enable base plates to be CNC'd with 1/4" bits by modding bottom most corner radius to 3.175mm (Rough POC edits for feedback...) #42

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Enable base plates to be CNC'd with 1/4" bits by modding bottom most corner radius to 3.175mm (Rough POC edits for feedback...) #42

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2f48434
Add label_recess to handle warped prints created during Printer tunin…
aaronse Feb 21, 2025
e99cdc6
Change bottom most corner radius to 3.175mm from 1.6mm. Goal being t…
aaronse Feb 21, 2025
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81 changes: 64 additions & 17 deletions gridfinity_cup_modules.scad
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,12 @@ default_half_pitch = false;
default_lip_style = "normal";
// Limit attachments (magnets and scres) to box corners for faster printing.
box_corner_attachments_only = false;
// Label recess depth, use to increase tolerance for top of label. Useful if printing
// gridfinity cubes when printer tuning and experiencing poor cooling resulting in lift
// or warping, but still want a usable cube.
// Zack's design is 0mm
label_recess = 1.5;

basic_cup(
num_x=2,
num_y=1,
Expand Down Expand Up @@ -74,10 +80,21 @@ module basic_cup(

difference() {
grid_block(num_x, num_y, num_z, magnet_diameter, screw_depth, hole_overhang_remedy=hole_overhang_remedy, half_pitch=half_pitch, box_corner_attachments_only=box_corner_attachments_only);
color("red") partitioned_cavity(num_x, num_y, num_z, withLabel=withLabel,
labelWidth=labelWidth, fingerslide=fingerslide, magnet_diameter=magnet_diameter,
screw_depth=screw_depth, floor_thickness=floor_thickness, wall_thickness=wall_thickness,
efficient_floor=efficient_floor, separator_positions=separator_positions, lip_style=lip_style);
color("red")
partitioned_cavity(
num_x,
num_y,
num_z,
withLabel=withLabel,
labelWidth=labelWidth,
fingerslide=fingerslide,
magnet_diameter=magnet_diameter,
screw_depth=screw_depth,
floor_thickness=floor_thickness,
wall_thickness=wall_thickness,
efficient_floor=efficient_floor,
separator_positions=separator_positions,
lip_style=lip_style);
}
}

Expand All @@ -100,6 +117,7 @@ module irregular_cup(
separator_positions=[],
lip_style=default_lip_style
) {

difference() {
grid_block(num_x, num_y, num_z, magnet_diameter, screw_depth, hole_overhang_remedy=hole_overhang_remedy, half_pitch=half_pitch, box_corner_attachments_only=box_corner_attachments_only);
color("red") partitioned_cavity(num_x, num_y, num_z, withLabel=withLabel,
Expand All @@ -110,11 +128,21 @@ module irregular_cup(
}


module partitioned_cavity(num_x, num_y, num_z, withLabel=default_withLabel,
labelWidth=default_labelWidth, fingerslide=default_fingerslide,
magnet_diameter=default_magnet_diameter, screw_depth=default_screw_depth,
floor_thickness=default_floor_thickness, wall_thickness=default_wall_thickness,
efficient_floor=default_efficient_floor, separator_positions=[], lip_style=default_lip_style) {
module partitioned_cavity(
num_x,
num_y,
num_z,
withLabel=default_withLabel,
labelWidth=default_labelWidth,
fingerslide=default_fingerslide,
magnet_diameter=default_magnet_diameter,
screw_depth=default_screw_depth,
floor_thickness=default_floor_thickness,
wall_thickness=default_wall_thickness,
efficient_floor=default_efficient_floor,
separator_positions=[],
lip_style=default_lip_style) {

// cavity with removed segments so that we leave dividing walls behind
gp = gridfinity_pitch;
outer_wall_th = 1.8; // cavity is this far away from the 42mm 'ideal' block
Expand All @@ -131,9 +159,17 @@ module partitioned_cavity(num_x, num_y, num_z, withLabel=default_withLabel,
cavity_xsize = gp*num_x-2*outer_wall_th;

difference() {
basic_cavity(num_x, num_y, num_z, fingerslide=fingerslide, magnet_diameter=magnet_diameter,
screw_depth=screw_depth, floor_thickness=floor_thickness, wall_thickness=wall_thickness,
efficient_floor=efficient_floor, lip_style=lip_style);
basic_cavity(
num_x,
num_y,
num_z,
fingerslide=fingerslide,
magnet_diameter=magnet_diameter,
screw_depth=screw_depth,
floor_thickness=floor_thickness,
wall_thickness=wall_thickness,
efficient_floor=efficient_floor,
lip_style=lip_style);

if (len(separator_positions) > 0) {
for (i=[0:len(separator_positions)-1]) {
Expand Down Expand Up @@ -161,7 +197,10 @@ module partitioned_cavity(num_x, num_y, num_z, withLabel=default_withLabel,
: 0 ;

hull() for (i=[0,1, 2])
translate([(-gridfinity_pitch/2) + ((chamberStart + label_pos_x) * gridfinity_pitch), yz[i][0], yz[i][1]])
translate([
(-gridfinity_pitch/2) + ((chamberStart + label_pos_x) * gridfinity_pitch),
yz[i][0],
-label_recess + yz[i][1]])
rotate([0, 90, 0])
union(){
tz(abs(label_num_x)*gridfinity_pitch)
Expand All @@ -174,10 +213,18 @@ module partitioned_cavity(num_x, num_y, num_z, withLabel=default_withLabel,
}


module basic_cavity(num_x, num_y, num_z, fingerslide=default_fingerslide,
magnet_diameter=default_magnet_diameter, screw_depth=default_screw_depth,
floor_thickness=default_floor_thickness, wall_thickness=default_wall_thickness,
efficient_floor=default_efficient_floor, lip_style=default_lip_style) {
module basic_cavity(
num_x,
num_y,
num_z,
fingerslide=default_fingerslide,
magnet_diameter=default_magnet_diameter,
screw_depth=default_screw_depth,
floor_thickness=default_floor_thickness,
wall_thickness=default_wall_thickness,
efficient_floor=default_efficient_floor,
lip_style=default_lip_style) {

eps = 0.1;
// I couldn't think of a good name for this ('q') but effectively it's the
// size of the overhang that produces a wall thickness that's less than the lip
Expand Down
57 changes: 43 additions & 14 deletions gridfinity_modules.scad
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -38,17 +38,17 @@ module grid_block(num_x=1, num_y=1, num_z=2, magnet_diameter=6.5, screw_depth=6,
cube([gridfinity_pitch*num_x, gridfinity_pitch*num_y, totalht-5]);
}

// crop with outer cylinders
// crop outer corners with outer cylinders
translate([0, 0, -0.1])
hull()
cornercopy(block_corner_position, num_x, num_y)
cylinder(r=corner_radius, h=totalht+0.2, $fn=32);
}

// remove top so XxY can fit on top
color("blue")
translate([0, 0, gridfinity_zpitch*num_z])
pad_oversize(num_x, num_y, 1);
color("blue")
translate([0, 0, gridfinity_zpitch*num_z])
pad_oversize(num_x, num_y, 1);

if (esd > 0) { // add pockets for screws if requested
gridcopycorners(ceil(num_x), ceil(num_y), magnet_position, box_corner_attachments_only)
Expand Down Expand Up @@ -145,31 +145,60 @@ module pad_oversize(num_x=1, num_y=1, margins=0) {
// female parts are a bit oversize for a nicer fit
radialgap = margins ? 0.25 : 0; // oversize cylinders for a bit of clearance
axialdown = margins ? 0.1 : 0; // a tiny bit of axial clearance present in Zack's design


small_radius = 1.6;
med_radius = 3.2;
big_radius = 7.5;
block_corner_outer_radius = big_radius;

// Use to enable containers to fit trays CNC carved with 1/4" bit
bottom_radius = margins ? small_radius : 3.175;
bottom_radius_offset = (bottom_radius - small_radius) / 2;

translate([0, 0, -axialdown])
difference() {
union() {
// Pad upper taper
color("purple")
hull() cornercopy(pad_corner_position, num_x, num_y) {
if (sharp_corners) {
cylsq(d=1.6+2*radialgap, h=0.1);
translate([0, 0, bevel1_top]) cylsq(d=3.2+2*radialgap, h=1.9);
translate([0, 0, bevel2_bottom])
cylsq2(d1=med_radius+2*radialgap, d2=block_corner_outer_radius+0.5+2*radialgap+2*bonus_ht, h=bevel2_top-bevel2_bottom+bonus_ht);
}
else {
cylinder(d=1.6+2*radialgap, h=0.1, $fn=24);
translate([0, 0, bevel1_top]) cylinder(d=3.2+2*radialgap, h=1.9, $fn=32);
translate([0, 0, bevel2_bottom])
cylinder(d1=med_radius+2*radialgap, d2=block_corner_outer_radius+0.5+2*radialgap+2*bonus_ht, h=bevel2_top-bevel2_bottom+bonus_ht, $fn=32);
}
}

hull() cornercopy(pad_corner_position, num_x, num_y) {
// Pad mid vertical
color("blue")
hull()
cornercopy(pad_corner_position, num_x, num_y)
{
if (sharp_corners) {
translate([0, 0, bevel2_bottom])
cylsq2(d1=3.2+2*radialgap, d2=7.5+0.5+2*radialgap+2*bonus_ht, h=bevel2_top-bevel2_bottom+bonus_ht);
cylsq(d=small_radius+2*radialgap, h=0.1);
translate([0, 0, bevel1_top]) cylsq(d=med_radius+2*radialgap, h=1.9);
}
else {
translate([0, 0, bevel2_bottom])
cylinder(d1=3.2+2*radialgap, d2=7.5+0.5+2*radialgap+2*bonus_ht, h=bevel2_top-bevel2_bottom+bonus_ht, $fn=32);
translate([0, 0, bevel1_top]) cylinder(d=med_radius+2*radialgap, h=1.9, $fn=32);
}
}

// Pad lower taper
color("green")
hull()
union()
{
cornercopy(pad_corner_position, num_x, num_y)
{
translate([0, 0, bevel1_top]) cylinder(d=med_radius+2*radialgap, h=0.1, $fn=32);
}
cornercopy(pad_corner_position - bottom_radius_offset, num_x, num_y)
{
cylinder(d=bottom_radius+2*radialgap, h=bevel1_top, $fn=32);
}
}
}

// cut off bottom if we're going to go negative
Expand Down