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Add Gridfinity Refined thumbscrew option (#226)

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4
README.md
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@ -37,6 +37,10 @@ The printable holes allow your slicer to bridge the gap inside the countersunk m
## Recommendations
For best results, use a version of OpenSCAD with the fast-csg feature. As of writing, this feature is only implemented in the [development snapshots](https://openscad.org/downloads.html). To enable the feature, go to Edit > Preferences > Features > fast-csg. On my computer, this sped up rendering from 10 minutes down to a couple of seconds, even for comically large bins.
## External libraries
- `threads-scad` (https://github.com/rcolyer/threads-scad) is used for creating threaded holes, and is included in this project under `external/threads-scad/threads.scad`.
## Enjoy!
[<img src="./images/spin.gif" width="160">]()

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external/threads-scad/threads.scad vendored Normal file
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@ -0,0 +1,631 @@
// Created 2016-2017 by Ryan A. Colyer.
// This work is released with CC0 into the public domain.
// https://creativecommons.org/publicdomain/zero/1.0/
//
// https://www.thingiverse.com/thing:1686322
//
// v2.1
screw_resolution = 0.2; // in mm
// Provides standard metric thread pitches.
function ThreadPitch(diameter) =
(diameter <= 64) ?
lookup(diameter, [
[2, 0.4],
[2.5, 0.45],
[3, 0.5],
[4, 0.7],
[5, 0.8],
[6, 1.0],
[7, 1.0],
[8, 1.25],
[10, 1.5],
[12, 1.75],
[14, 2.0],
[16, 2.0],
[18, 2.5],
[20, 2.5],
[22, 2.5],
[24, 3.0],
[27, 3.0],
[30, 3.5],
[33, 3.5],
[36, 4.0],
[39, 4.0],
[42, 4.5],
[48, 5.0],
[52, 5.0],
[56, 5.5],
[60, 5.5],
[64, 6.0]
]) :
diameter * 6.0 / 64;
// Provides standard metric hex head widths across the flats.
function HexAcrossFlats(diameter) =
(diameter <= 64) ?
lookup(diameter, [
[2, 4],
[2.5, 5],
[3, 5.5],
[3.5, 6],
[4, 7],
[5, 8],
[6, 10],
[7, 11],
[8, 13],
[10, 16],
[12, 18],
[14, 21],
[16, 24],
[18, 27],
[20, 30],
[22, 34],
[24, 36],
[27, 41],
[30, 46],
[33, 50],
[36, 55],
[39, 60],
[42, 65],
[48, 75],
[52, 80],
[56, 85],
[60, 90],
[64, 95]
]) :
diameter * 95 / 64;
// Provides standard metric hex head widths across the corners.
function HexAcrossCorners(diameter) =
HexAcrossFlats(diameter) / cos(30);
// Provides standard metric hex (Allen) drive widths across the flats.
function HexDriveAcrossFlats(diameter) =
(diameter <= 64) ?
lookup(diameter, [
[2, 1.5],
[2.5, 2],
[3, 2.5],
[3.5, 3],
[4, 3],
[5, 4],
[6, 5],
[7, 5],
[8, 6],
[10, 8],
[12, 10],
[14, 12],
[16, 14],
[18, 15],
[20, 17],
[22, 18],
[24, 19],
[27, 20],
[30, 22],
[33, 24],
[36, 27],
[39, 30],
[42, 32],
[48, 36],
[52, 36],
[56, 41],
[60, 42],
[64, 46]
]) :
diameter * 46 / 64;
// Provides standard metric hex (Allen) drive widths across the corners.
function HexDriveAcrossCorners(diameter) =
HexDriveAcrossFlats(diameter) / cos(30);
// Provides metric countersunk hex (Allen) drive widths across the flats.
function CountersunkDriveAcrossFlats(diameter) =
(diameter <= 14) ?
HexDriveAcrossFlats(HexDriveAcrossFlats(diameter)) :
round(0.6*diameter);
// Provides metric countersunk hex (Allen) drive widths across the corners.
function CountersunkDriveAcrossCorners(diameter) =
CountersunkDriveAcrossFlats(diameter) / cos(30);
// Provides standard metric nut thickness.
function NutThickness(diameter) =
(diameter <= 64) ?
lookup(diameter, [
[2, 1.6],
[2.5, 2],
[3, 2.4],
[3.5, 2.8],
[4, 3.2],
[5, 4.7],
[6, 5.2],
[7, 6.0],
[8, 6.8],
[10, 8.4],
[12, 10.8],
[14, 12.8],
[16, 14.8],
[18, 15.8],
[20, 18.0],
[22, 21.1],
[24, 21.5],
[27, 23.8],
[30, 25.6],
[33, 28.7],
[36, 31.0],
[42, 34],
[48, 38],
[56, 45],
[64, 51]
]) :
diameter * 51 / 64;
// This generates a closed polyhedron from an array of arrays of points,
// with each inner array tracing out one loop outlining the polyhedron.
// pointarrays should contain an array of N arrays each of size P outlining a
// closed manifold. The points must obey the right-hand rule. For example,
// looking down, the P points in the inner arrays are counter-clockwise in a
// loop, while the N point arrays increase in height. Points in each inner
// array do not need to be equal height, but they usually should not meet or
// cross the line segments from the adjacent points in the other arrays.
// (N>=2, P>=3)
// Core triangles:
// [j][i], [j+1][i], [j+1][(i+1)%P]
// [j][i], [j+1][(i+1)%P], [j][(i+1)%P]
// Then triangles are formed in a loop with the middle point of the first
// and last array.
module ClosePoints(pointarrays) {
function recurse_avg(arr, n=0, p=[0,0,0]) = (n>=len(arr)) ? p :
recurse_avg(arr, n+1, p+(arr[n]-p)/(n+1));
N = len(pointarrays);
P = len(pointarrays[0]);
NP = N*P;
lastarr = pointarrays[N-1];
midbot = recurse_avg(pointarrays[0]);
midtop = recurse_avg(pointarrays[N-1]);
faces_bot = [
for (i=[0:P-1])
[0,i+1,1+(i+1)%len(pointarrays[0])]
];
loop_offset = 1;
bot_len = loop_offset + P;
faces_loop = [
for (j=[0:N-2], i=[0:P-1], t=[0:1])
[loop_offset, loop_offset, loop_offset] + (t==0 ?
[j*P+i, (j+1)*P+i, (j+1)*P+(i+1)%P] :
[j*P+i, (j+1)*P+(i+1)%P, j*P+(i+1)%P])
];
top_offset = loop_offset + NP - P;
midtop_offset = top_offset + P;
faces_top = [
for (i=[0:P-1])
[midtop_offset,top_offset+(i+1)%P,top_offset+i]
];
points = [
for (i=[-1:NP])
(i<0) ? midbot :
((i==NP) ? midtop :
pointarrays[floor(i/P)][i%P])
];
faces = concat(faces_bot, faces_loop, faces_top);
polyhedron(points=points, faces=faces);
}
// This creates a vertical rod at the origin with external threads. It uses
// metric standards by default.
module ScrewThread(outer_diam, height, pitch=0, tooth_angle=30, tolerance=0.4, tip_height=0, tooth_height=0, tip_min_fract=0) {
pitch = (pitch==0) ? ThreadPitch(outer_diam) : pitch;
tooth_height = (tooth_height==0) ? pitch : tooth_height;
tip_min_fract = (tip_min_fract<0) ? 0 :
((tip_min_fract>0.9999) ? 0.9999 : tip_min_fract);
outer_diam_cor = outer_diam + 0.25*tolerance; // Plastic shrinkage correction
inner_diam = outer_diam - tooth_height/tan(tooth_angle);
or = (outer_diam_cor < screw_resolution) ?
screw_resolution/2 : outer_diam_cor / 2;
ir = (inner_diam < screw_resolution) ? screw_resolution/2 : inner_diam / 2;
height = (height < screw_resolution) ? screw_resolution : height;
steps_per_loop_try = ceil(2*3.14159265359*or / screw_resolution);
steps_per_loop = (steps_per_loop_try < 4) ? 4 : steps_per_loop_try;
hs_ext = 3;
hsteps = ceil(3 * height / pitch) + 2*hs_ext;
extent = or - ir;
tip_start = height-tip_height;
tip_height_sc = tip_height / (1-tip_min_fract);
tip_height_ir = (tip_height_sc > tooth_height/2) ?
tip_height_sc - tooth_height/2 : tip_height_sc;
tip_height_w = (tip_height_sc > tooth_height) ? tooth_height : tip_height_sc;
tip_wstart = height + tip_height_sc - tip_height - tip_height_w;
function tooth_width(a, h, pitch, tooth_height, extent) =
let(
ang_full = h*360.0/pitch-a,
ang_pn = atan2(sin(ang_full), cos(ang_full)),
ang = ang_pn < 0 ? ang_pn+360 : ang_pn,
frac = ang/360,
tfrac_half = tooth_height / (2*pitch),
tfrac_cut = 2*tfrac_half
)
(frac > tfrac_cut) ? 0 : (
(frac <= tfrac_half) ?
((frac / tfrac_half) * extent) :
((1 - (frac - tfrac_half)/tfrac_half) * extent)
);
pointarrays = [
for (hs=[0:hsteps])
[
for (s=[0:steps_per_loop-1])
let(
ang_full = s*360.0/steps_per_loop,
ang_pn = atan2(sin(ang_full), cos(ang_full)),
ang = ang_pn < 0 ? ang_pn+360 : ang_pn,
h_fudge = pitch*0.001,
h_mod =
(hs%3 == 2) ?
((s == steps_per_loop-1) ? tooth_height - h_fudge : (
(s == steps_per_loop-2) ? tooth_height/2 : 0)) : (
(hs%3 == 0) ?
((s == steps_per_loop-1) ? pitch-tooth_height/2 : (
(s == steps_per_loop-2) ? pitch-tooth_height + h_fudge : 0)) :
((s == steps_per_loop-1) ? pitch-tooth_height/2 + h_fudge : (
(s == steps_per_loop-2) ? tooth_height/2 : 0))
),
h_level =
(hs%3 == 2) ? tooth_height - h_fudge : (
(hs%3 == 0) ? 0 : tooth_height/2),
h_ub = floor((hs-hs_ext)/3) * pitch
+ h_level + ang*pitch/360.0 - h_mod,
h_max = height - (hsteps-hs) * h_fudge,
h_min = hs * h_fudge,
h = (h_ub < h_min) ? h_min : ((h_ub > h_max) ? h_max : h_ub),
ht = h - tip_start,
hf_ir = ht/tip_height_ir,
ht_w = h - tip_wstart,
hf_w_t = ht_w/tip_height_w,
hf_w = (hf_w_t < 0) ? 0 : ((hf_w_t > 1) ? 1 : hf_w_t),
ext_tip = (h <= tip_wstart) ? extent : (1-hf_w) * extent,
wnormal = tooth_width(ang, h, pitch, tooth_height, ext_tip),
w = (h <= tip_wstart) ? wnormal :
(1-hf_w) * wnormal +
hf_w * (0.1*screw_resolution + (wnormal * wnormal * wnormal /
(ext_tip*ext_tip+0.1*screw_resolution))),
r = (ht <= 0) ? ir + w :
( (ht < tip_height_ir ? ((2/(1+(hf_ir*hf_ir))-1) * ir) : 0) + w)
)
[r*cos(ang), r*sin(ang), h]
]
];
ClosePoints(pointarrays);
}
// This creates a vertical rod at the origin with external auger-style
// threads.
module AugerThread(outer_diam, inner_diam, height, pitch, tooth_angle=30, tolerance=0.4, tip_height=0, tip_min_fract=0) {
tooth_height = tan(tooth_angle)*(outer_diam-inner_diam);
ScrewThread(outer_diam, height, pitch, tooth_angle, tolerance, tip_height,
tooth_height, tip_min_fract);
}
// This creates a threaded hole in its children using metric standards by
// default.
module ScrewHole(outer_diam, height, position=[0,0,0], rotation=[0,0,0], pitch=0, tooth_angle=30, tolerance=0.4, tooth_height=0) {
extra_height = 0.001 * height;
difference() {
children();
translate(position)
rotate(rotation)
translate([0, 0, -extra_height/2])
ScrewThread(1.01*outer_diam + 1.25*tolerance, height + extra_height,
pitch, tooth_angle, tolerance, tooth_height=tooth_height);
}
}
// This creates an auger-style threaded hole in its children.
module AugerHole(outer_diam, inner_diam, height, pitch, position=[0,0,0], rotation=[0,0,0], tooth_angle=30, tolerance=0.4) {
tooth_height = tan(tooth_angle)*(outer_diam-inner_diam);
ScrewHole(outer_diam, height, position, rotation, pitch, tooth_angle,
tolerance, tooth_height=tooth_height) children();
}
// This inserts a ClearanceHole in its children.
// The rotation vector is applied first, then the position translation,
// starting from a position upward from the z-axis at z=0.
module ClearanceHole(diameter, height, position=[0,0,0], rotation=[0,0,0], tolerance=0.4) {
extra_height = 0.001 * height;
difference() {
children();
translate(position)
rotate(rotation)
translate([0, 0, -extra_height/2])
cylinder(h=height + extra_height, r=(diameter/2+tolerance));
}
}
// This inserts a ClearanceHole with a recessed bolt hole in its children.
// The rotation vector is applied first, then the position translation,
// starting from a position upward from the z-axis at z=0. The default
// recessed parameters fit a standard metric bolt.
module RecessedClearanceHole(diameter, height, position=[0,0,0], rotation=[0,0,0], recessed_diam=-1, recessed_height=-1, tolerance=0.4) {
recessed_diam = (recessed_diam < 0) ?
HexAcrossCorners(diameter) : recessed_diam;
recessed_height = (recessed_height < 0) ? diameter : recessed_height;
extra_height = 0.001 * height;
difference() {
children();
translate(position)
rotate(rotation)
translate([0, 0, -extra_height/2])
cylinder(h=height + extra_height, r=(diameter/2+tolerance));
translate(position)
rotate(rotation)
translate([0, 0, -extra_height/2])
cylinder(h=recessed_height + extra_height/2,
r=(recessed_diam/2+tolerance));
}
}
// This inserts a countersunk ClearanceHole in its children.
// The rotation vector is applied first, then the position translation,
// starting from a position upward from the z-axis at z=0.
// The countersunk side is on the bottom by default.
module CountersunkClearanceHole(diameter, height, position=[0,0,0], rotation=[0,0,0], sinkdiam=0, sinkangle=45, tolerance=0.4) {
extra_height = 0.001 * height;
sinkdiam = (sinkdiam==0) ? 2*diameter : sinkdiam;
sinkheight = ((sinkdiam-diameter)/2)/tan(sinkangle);
difference() {
children();
translate(position)
rotate(rotation)
translate([0, 0, -extra_height/2])
union() {
cylinder(h=height + extra_height, r=(diameter/2+tolerance));
cylinder(h=sinkheight + extra_height, r1=(sinkdiam/2+tolerance), r2=(diameter/2+tolerance), $fn=24*diameter);
}
}
}
// This inserts a Phillips tip shaped hole into its children.
// The rotation vector is applied first, then the position translation,
// starting from a position upward from the z-axis at z=0.
module PhillipsTip(width=7, thickness=0, straightdepth=0, position=[0,0,0], rotation=[0,0,0]) {
thickness = (thickness <= 0) ? width*2.5/7 : thickness;
straightdepth = (straightdepth <= 0) ? width*3.5/7 : straightdepth;
angledepth = (width-thickness)/2;
height = straightdepth + angledepth;
extra_height = 0.001 * height;
difference() {
children();
translate(position)
rotate(rotation)
union() {
hull() {
translate([-width/2, -thickness/2, -extra_height/2])
cube([width, thickness, straightdepth+extra_height]);
translate([-thickness/2, -thickness/2, height-extra_height])
cube([thickness, thickness, extra_height]);
}
hull() {
translate([-thickness/2, -width/2, -extra_height/2])
cube([thickness, width, straightdepth+extra_height]);
translate([-thickness/2, -thickness/2, height-extra_height])
cube([thickness, thickness, extra_height]);
}
}
}
}
// Create a standard sized metric bolt with hex head and hex key.
module MetricBolt(diameter, length, tolerance=0.4) {
drive_tolerance = pow(3*tolerance/HexDriveAcrossCorners(diameter),2)
+ 0.75*tolerance;
difference() {
cylinder(h=diameter, r=(HexAcrossCorners(diameter)/2-0.5*tolerance), $fn=6);
cylinder(h=diameter,
r=(HexDriveAcrossCorners(diameter)+drive_tolerance)/2, $fn=6,
center=true);
}
translate([0,0,diameter-0.01])
ScrewThread(diameter, length+0.01, tolerance=tolerance,
tip_height=ThreadPitch(diameter), tip_min_fract=0.75);
}
// Create a standard sized metric countersunk (flat) bolt with hex key drive.
// In compliance with convention, the length for this includes the head.
module MetricCountersunkBolt(diameter, length, tolerance=0.4) {
drive_tolerance = pow(3*tolerance/CountersunkDriveAcrossCorners(diameter),2)
+ 0.75*tolerance;
difference() {
cylinder(h=diameter/2, r1=diameter, r2=diameter/2, $fn=24*diameter);
cylinder(h=0.8*diameter,
r=(CountersunkDriveAcrossCorners(diameter)+drive_tolerance)/2, $fn=6,
center=true);
}
translate([0,0,diameter/2-0.01])
ScrewThread(diameter, length-diameter/2+0.01, tolerance=tolerance,
tip_height=ThreadPitch(diameter), tip_min_fract=0.75);
}
// Create a standard sized metric countersunk (flat) bolt with hex key drive.
// In compliance with convention, the length for this includes the head.
module MetricWoodScrew(diameter, length, tolerance=0.4) {
drive_tolerance = pow(3*tolerance/CountersunkDriveAcrossCorners(diameter),2)
+ 0.75*tolerance;
PhillipsTip(diameter-2)
union() {
cylinder(h=diameter/2, r1=diameter, r2=diameter/2, $fn=24*diameter);
translate([0,0,diameter/2-0.01])
ScrewThread(diameter, length-diameter/2+0.01, tolerance=tolerance,
tip_height=diameter);
}
}
// Create a standard sized metric hex nut.
module MetricNut(diameter, thickness=0, tolerance=0.4) {
thickness = (thickness==0) ? NutThickness(diameter) : thickness;
ScrewHole(diameter, thickness, tolerance=tolerance)
cylinder(h=thickness, r=HexAcrossCorners(diameter)/2-0.5*tolerance, $fn=6);
}
// Create a convenient washer size for a metric nominal thread diameter.
module MetricWasher(diameter) {
difference() {
cylinder(h=diameter/5, r=1.15*diameter, $fn=24*diameter);
cylinder(h=2*diameter, r=0.575*diameter, $fn=12*diameter, center=true);
}
}
// Solid rod on the bottom, external threads on the top.
module RodStart(diameter, height, thread_len=0, thread_diam=0, thread_pitch=0) {
// A reasonable default.
thread_diam = (thread_diam==0) ? 0.75*diameter : thread_diam;
thread_len = (thread_len==0) ? 0.5*diameter : thread_len;
thread_pitch = (thread_pitch==0) ? ThreadPitch(thread_diam) : thread_pitch;
cylinder(r=diameter/2, h=height, $fn=24*diameter);
translate([0, 0, height])
ScrewThread(thread_diam, thread_len, thread_pitch,
tip_height=thread_pitch, tip_min_fract=0.75);
}
// Solid rod on the bottom, internal threads on the top.
// Flips around x-axis after printing to pair with RodStart.
module RodEnd(diameter, height, thread_len=0, thread_diam=0, thread_pitch=0) {
// A reasonable default.
thread_diam = (thread_diam==0) ? 0.75*diameter : thread_diam;
thread_len = (thread_len==0) ? 0.5*diameter : thread_len;
thread_pitch = (thread_pitch==0) ? ThreadPitch(thread_diam) : thread_pitch;
ScrewHole(thread_diam, thread_len, [0, 0, height], [180,0,0], thread_pitch)
cylinder(r=diameter/2, h=height, $fn=24*diameter);
}
// Internal threads on the bottom, external threads on the top.
module RodExtender(diameter, height, thread_len=0, thread_diam=0, thread_pitch=0) {
// A reasonable default.
thread_diam = (thread_diam==0) ? 0.75*diameter : thread_diam;
thread_len = (thread_len==0) ? 0.5*diameter : thread_len;
thread_pitch = (thread_pitch==0) ? ThreadPitch(thread_diam) : thread_pitch;
max_bridge = height - thread_len;
// Use 60 degree slope if it will fit.
bridge_height = ((thread_diam/4) < max_bridge) ? thread_diam/4 : max_bridge;
difference() {
union() {
ScrewHole(thread_diam, thread_len, pitch=thread_pitch)
cylinder(r=diameter/2, h=height, $fn=24*diameter);
translate([0,0,height])
ScrewThread(thread_diam, thread_len, pitch=thread_pitch,
tip_height=thread_pitch, tip_min_fract=0.75);
}
// Carve out a small conical area as a bridge.
translate([0,0,thread_len])
cylinder(h=bridge_height, r1=thread_diam/2, r2=0.1);
}
}
// Produces a matching set of metric bolts, nuts, and washers.
module MetricBoltSet(diameter, length, quantity=1) {
for (i=[0:quantity-1]) {
translate([0, i*4*diameter, 0]) MetricBolt(diameter, length);
translate([4*diameter, i*4*diameter, 0]) MetricNut(diameter);
translate([8*diameter, i*4*diameter, 0]) MetricWasher(diameter);
}
}
module Demo() {
translate([0,-0,0]) MetricBoltSet(3, 8);
translate([0,-20,0]) MetricBoltSet(4, 8);
translate([0,-40,0]) MetricBoltSet(5, 8);
translate([0,-60,0]) MetricBoltSet(6, 8);
translate([0,-80,0]) MetricBoltSet(8, 8);
translate([0,25,0]) MetricCountersunkBolt(5, 10);
translate([23,18,5])
scale([1,1,-1])
CountersunkClearanceHole(5, 8, [7,7,0], [0,0,0])
cube([14, 14, 5]);
translate([70, -10, 0])
RodStart(20, 30);
translate([70, 20, 0])
RodEnd(20, 30);
translate([70, -45, 0])
MetricWoodScrew(8, 20);
translate([12, 50, 0])
union() {
translate([0, 0, 5.99])
AugerThread(15, 3.5, 22, 7, tooth_angle=15, tip_height=7);
translate([-4, -9, 0]) cube([8, 18, 6]);
}
}
Demo();
//MetricBoltSet(6, 8, 10);

4
gridfinity-rebuilt-bins.scad
View file

@ -99,6 +99,8 @@ crush_ribs = true;
chamfer_holes = true;
// Magnet/Screw holes will be printed so supports are not needed.
printable_hole_top = true;
// Enable "gridfinity-refined" thumbscrew hole in the center of each base: https://www.printables.com/model/413761-gridfinity-refined
enable_thumbscrew = false;
hole_options = bundle_hole_options(refined_holes, magnet_holes, screw_holes, crush_ribs, chamfer_holes, printable_hole_top);
@ -116,7 +118,7 @@ gridfinityInit(gridx, gridy, height(gridz, gridz_define, style_lip, enable_zsnap
cutCylinders(n_divx=cdivx, n_divy=cdivy, cylinder_diameter=cd, cylinder_height=ch, coutout_depth=c_depth, orientation=c_orientation, chamfer=c_chamfer);
}
}
gridfinityBase(gridx, gridy, l_grid, div_base_x, div_base_y, hole_options, only_corners=only_corners);
gridfinityBase(gridx, gridy, l_grid, div_base_x, div_base_y, hole_options, only_corners=only_corners, thumbscrew=enable_thumbscrew);
}

37
gridfinity-rebuilt-utility.scad
View file

@ -7,6 +7,7 @@
include <standard.scad>
use <generic-helpers.scad>
use <gridfinity-rebuilt-holes.scad>
use <external/threads-scad/threads.scad>
// ===== User Modules ===== //
@ -201,8 +202,9 @@ module cut_move(x, y, w, h) {
/**
*@summary Create the base of a gridfinity bin, or use it for a custom object.
* @param length X,Y size of a single Gridfinity base.
* @param thumbscrew Enable "gridfinity-refined" thumbscrew hole in the center of each base unit. This is a ISO Metric Profile, 15.0mm size, M15x1.5 designation.
*/
module gridfinityBase(gx, gy, length, dx, dy, hole_options=bundle_hole_options(), off=0, final_cut=true, only_corners=false) {
module gridfinityBase(gx, gy, length, dx, dy, hole_options=bundle_hole_options(), off=0, final_cut=true, only_corners=false, thumbscrew=false) {
assert(
is_num(gx) &&
is_num(gy) &&
@ -210,7 +212,8 @@ module gridfinityBase(gx, gy, length, dx, dy, hole_options=bundle_hole_options()
is_num(dx) &&
is_num(dy) &&
is_bool(final_cut) &&
is_bool(only_corners)
is_bool(only_corners) &&
is_bool(thumbscrew)
);
dbnxt = [for (i=[1:5]) if (abs(gx*i)%1 < 0.001 || abs(gx*i)%1 > 0.999) i];
@ -241,7 +244,7 @@ module gridfinityBase(gx, gy, length, dx, dy, hole_options=bundle_hole_options()
if(only_corners) {
difference(){
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);
block_base(bundle_hole_options(), 0, individual_base_size_mm, thumbscrew=thumbscrew);
copy_mirror([0, 1, 0]) {
copy_mirror([1, 0, 0]) {
@ -257,7 +260,7 @@ module gridfinityBase(gx, gy, length, dx, dy, hole_options=bundle_hole_options()
}
else {
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);
block_base(hole_options, off, individual_base_size_mm, thumbscrew=thumbscrew);
}
}
@ -266,9 +269,14 @@ module gridfinityBase(gx, gy, length, dx, dy, hole_options=bundle_hole_options()
* @param hole_options @see block_base_hole.hole_options
* @param off
* @param size [x, y] size of a single base. Only set if deviating from the standard!
* @param thumbscrew Enable "gridfinity-refined" thumbscrew hole in the center of each base unit. This is a ISO Metric Profile, 15.0mm size, M15x1.5 designation.
*/
module block_base(hole_options, off=0, size=[BASE_SIZE, BASE_SIZE]) {
assert(is_list(size) && len(size) == 2);
module block_base(hole_options, off=0, size=[BASE_SIZE, BASE_SIZE], thumbscrew=false) {
assert(
is_list(size) &&
len(size) == 2 &&
is_bool(thumbscrew)
);
// How far, in the +x direction,
// the profile needs to be from it's [0, 0] point
@ -283,6 +291,13 @@ module block_base(hole_options, off=0, size=[BASE_SIZE, BASE_SIZE]) {
str("Minimum size of a single base must be greater than ", outer_diameter)
);
thumbscrew_outerdiam = 15;
thumbscrew_height = 5;
thumbscrew_tolerance = 0.4;
thumbscrew_tooth_angle = 30;
thumbscrew_pitch = 1.5;
render(convexity = 2)
difference() {
union() {
@ -301,6 +316,16 @@ module block_base(hole_options, off=0, size=[BASE_SIZE, BASE_SIZE]) {
);
}
if (thumbscrew) {
ScrewThread(
1.01 * thumbscrew_outerdiam + 1.25 * thumbscrew_tolerance,
thumbscrew_height,
thumbscrew_pitch,
thumbscrew_tooth_angle,
thumbscrew_tolerance,
tooth_height=0
);
}
// 4 holes
// Need this fancy code to support refined holes and non-square bases.
for(a=[0:90:270]){