gridfinity-rebuilt-openscad/gridfinity-rebuilt-baseplate.scad

include <gridfinity-rebuilt-utility.scad>
include <standard.scad>
use <gridfinity-rebuilt-holes.scad>

// ===== INFORMATION ===== //
/*
 IMPORTANT: rendering will be better for analyzing the model if fast-csg is enabled. As of writing, this feature is only available in the development builds and not the official release of OpenSCAD, but it makes rendering only take a couple seconds, even for comically large bins. Enable it in Edit > Preferences > Features > fast-csg

https://github.com/kennetek/gridfinity-rebuilt-openscad

*/

// ===== PARAMETERS ===== //

/* [Setup Parameters] */
$fa = 8;
$fs = 0.25;

/* [General Settings] */
// number of bases along x-axis
gridx = 5;
// number of bases along y-axis
gridy = 5;

/* [Screw Together Settings - Defaults work for M3 and 4-40] */
// screw diameter
d_screw = 3.35;
// screw head diameter
d_screw_head = 5;
// screw spacing distance
screw_spacing = .5;
// number of screws per grid block
n_screws = 1; // [1:3]


/* [Fit to Drawer] */
// minimum length of baseplate along x (leave zero to ignore, will automatically fill area if gridx is zero)
distancex = 0;
// minimum length of baseplate along y (leave zero to ignore, will automatically fill area if gridy is zero)
distancey = 0;

// where to align extra space along x
fitx = 0; // [-1:0.1:1]
// where to align extra space along y
fity = 0; // [-1:0.1:1]


/* [Styles] */

// baseplate styles
style_plate = 0; // [0: thin, 1:weighted, 2:skeletonized, 3: screw together, 4: screw together minimal]


// hole styles
style_hole = 2; // [0:none, 1:countersink, 2:counterbore]

/* [Magnet Hole] */
// Baseplate will have holes for 6mm Diameter x 2mm high magnets.
enable_magnet = true;
// Magnet holes will have crush ribs to hold the magnet.
crush_ribs = true;
// Magnet holes will have a chamfer to ease insertion.
chamfer_holes = true;

hole_options = bundle_hole_options(refined_hole=false, magnet_hole=enable_magnet, screw_hole=false, crush_ribs=crush_ribs, chamfer=chamfer_holes, supportless=false);

// ===== IMPLEMENTATION ===== //

color("tomato")
gridfinityBaseplate(gridx, gridy, l_grid, distancex, distancey, style_plate, hole_options, style_hole, fitx, fity);


// ===== CONSTRUCTION ===== //

module gridfinityBaseplate(gridx, gridy, length, dix, diy, sp, hole_options, sh, fitx, fity) {

    assert(gridx > 0 || dix > 0, "Must have positive x grid amount!");
    assert(gridy > 0 || diy > 0, "Must have positive y grid amount!");

    gx = gridx == 0 ? floor(dix/length) : gridx;
    gy = gridy == 0 ? floor(diy/length) : gridy;
    dx = max(gx*length-bp_xy_clearance, dix);
    dy = max(gy*length-bp_xy_clearance, diy);

    off = calculate_offset(sp, hole_options[1], sh);

    offsetx = dix < dx ? 0 : (gx*length-bp_xy_clearance-dix)/2*fitx*-1;
    offsety = diy < dy ? 0 : (gy*length-bp_xy_clearance-diy)/2*fity*-1;

    difference() {
        translate([offsetx,offsety,h_base])
        mirror([0,0,1])
        rounded_rectangle(dx, dy, h_base+off, r_base);

        gridfinityBase(gx, gy, length, 1, 1, bundle_hole_options(), 0.5, false);

        translate([offsetx,offsety,h_base-0.6])
        rounded_rectangle(dx*2, dy*2, h_base*2, r_base);

        pattern_linear(gx, gy, length) {
            render(convexity = 6) {

                if (sp == 1)
                    translate([0,0,-off])
                    cutter_weight();
                else if (sp == 2 || sp == 3)
                    linear_extrude(10*(h_base+off), center = true)
                    profile_skeleton();
                else if (sp == 4)
                    translate([0,0,-5*(h_base+off)])
                    rounded_square(length-2*r_c2-2*r_c1, 10*(h_base+off), r_fo3);


                hole_pattern(){
                    mirror([0, 0, 1])
                    block_base_hole(hole_options);

                    translate([0,0,-off-TOLLERANCE])
                    if (sh == 1) cutter_countersink();
                    else if (sh == 2) cutter_counterbore();
                }
            }
        }
        screw_together = sp == 3 || sp == 4;
        if (screw_together) cutter_screw_together(gx, gy, off);
    }

}

function calculate_offset(style_plate, enable_magnet, style_hole) =
    assert(style_plate >=0 && style_plate <=4)
    let (screw_together = style_plate == 3 || style_plate == 4)
    screw_together ? 6.75 :
    style_plate==0 ? 0 :
    style_plate==1 ? bp_h_bot :
    calculate_offset_skeletonized(enable_magnet, style_hole);

function calculate_offset_skeletonized(enable_magnet, style_hole) =
    h_skel + (enable_magnet ? MAGNET_HOLE_DEPTH : 0) +
    (
        style_hole==0 ? d_screw :
        style_hole==1 ? BASEPLATE_SCREW_COUNTERSINK_ADDITIONAL_RADIUS : // Only works because countersink is at 45 degree angle!
        BASEPLATE_SCREW_COUNTERBORE_HEIGHT
    );

module cutter_weight() {
    union() {
        linear_extrude(bp_cut_depth*2,center=true)
        square(bp_cut_size, center=true);
        pattern_circular(4)
        translate([0,10,0])
        linear_extrude(bp_rcut_depth*2,center=true)
        union() {
            square([bp_rcut_width, bp_rcut_length], center=true);
            translate([0,bp_rcut_length/2,0])
            circle(d=bp_rcut_width);
        }
    }
}
module hole_pattern(){
    pattern_circular(4)
    translate([l_grid/2-d_hole_from_side, l_grid/2-d_hole_from_side, 0]) {
        render();
        children();
    }
}

module cutter_countersink(){
    screw_hole(SCREW_HOLE_RADIUS + d_clear, 2*h_base,
        false, BASEPLATE_SCREW_COUNTERSINK_ADDITIONAL_RADIUS);
}

module cutter_counterbore(){
    screw_radius = SCREW_HOLE_RADIUS + d_clear;
    counterbore_height = BASEPLATE_SCREW_COUNTERBORE_HEIGHT + 2*LAYER_HEIGHT;
    union(){
        cylinder(h=2*h_base, r=screw_radius);
        difference() {
            cylinder(h = counterbore_height, r=BASEPLATE_SCREW_COUNTERBORE_RADIUS);
            make_hole_printable(screw_radius, BASEPLATE_SCREW_COUNTERBORE_RADIUS, counterbore_height);
        }
    }
}

/**
 * @brief 2d Cutter to skeletonize the baseplate.
 * @example difference(){
 *              cube(large_number);
 *              linear_extrude(large_number+TOLLERANCE)
 *              profile_skeleton();
 *          }
 */
module profile_skeleton() {
    l = l_grid-2*r_c2-2*r_c1;

    offset(r_skel)
    difference() {
        square(l-2*r_skel+2*d_clear, center = true);

        hole_pattern()
        offset(MAGNET_HOLE_RADIUS+r_skel+2)
        square([l,l]);
    }
}

module cutter_screw_together(gx, gy, off) {

    screw(gx, gy);
    rotate([0,0,90])
    screw(gy, gx);

    module screw(a, b) {
        copy_mirror([1,0,0])
        translate([a*l_grid/2, 0, -off/2])
        pattern_linear(1, b, 1, l_grid)
        pattern_linear(1, n_screws, 1, d_screw_head + screw_spacing)
        rotate([0,90,0])
        cylinder(h=l_grid/2, d=d_screw, center = true);
    }
}