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597 lines
23 KiB
OpenSCAD
597 lines
23 KiB
OpenSCAD
//
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// NopSCADlib Copyright Chris Palmer 2018
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// nop.head@gmail.com
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// hydraraptor.blogspot.com
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//
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// This file is part of NopSCADlib.
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//
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// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
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// GNU General Public License as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along with NopSCADlib.
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// If not, see <https://www.gnu.org/licenses/>.
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//
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//
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//! A box made from routed or laser cut sheet sheets and printed profiles and bezels. It can be arbitrarily large
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//! compared to the 3D printed parts because they can be cut into interlocking sections and solvent welded
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//! together. The box panels can be customised to have holes and parts mounted on them by overriding the
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//! definitions of `box_base()`, `box_front()`, etc.
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//!
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//! `box.scad` should be `use`d and `box_assembly.scad` `include`d.
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//!
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//! A box is defined with a list that specifies the inside dimensions, top, bottom and side sheet materials, the
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//! screw type and printed part wall thickness. This diagram shows how the various dimensions are labelled:
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//! 
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//!
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//! Normally the side sheets are the same type but they can be overridden individually as long as the substitute has the same thickness.
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//
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include <../core.scad>
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use <../vitamins/sheet.scad>
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use <../vitamins/insert.scad>
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use <../utils/quadrant.scad>
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use <../utils/round.scad>
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bezel_clearance = 0.2;
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sheet_end_clearance = 1;
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sheet_slot_clearance = 0.2;
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function box_screw(type) = type[0]; //! Screw type to be used at the corners
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function box_shelf_screw(type) = type[1]; //! Screw type to hold a shelf
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function box_wall(type) = type[2]; //! Wall thickness of 3D parts
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function box_sheets(type) = type[3]; //! Sheet type used for the sides
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function box_top_sheet(type) = type[4]; //! Sheet type for the top
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function box_base_sheet(type) = type[5]; //! Sheet type for the bottom
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function box_feet(type) = type[6]; //! True to enable feet on the bottom bezel
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function box_width(type) = type[7]; //! Internal width
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function box_depth(type) = type[8]; //! Internal depth
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function box_height(type) = type[9]; //! Internal height
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function box(screw, wall, sheets, top_sheet, base_sheet, size, feet = false, shelf_screw = M3_dome_screw) = //! Construct a property list for a box.
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concat([screw, shelf_screw, wall, sheets, top_sheet, base_sheet, feet], size);
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function box_bezel_clearance(type) = bezel_clearance;
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function box_corner_gap(type) = 3; //! Gap between box_sheets at the corners to connect inside and outside profiles
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function box_profile_overlap(type) = 3 + sheet_end_clearance / 2;
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function box_washer(type) = screw_washer(box_screw(type));
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function box_insert(type) = screw_insert(box_screw(type));
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function box_shelf_insert(type) = screw_insert(box_shelf_screw(type));
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function box_hole_inset(type) = washer_radius(box_washer(type)) + 1;
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function box_insert_r(type) = insert_hole_radius(box_insert(type));
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function box_insert_l(type) = insert_length(box_insert(type));
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function box_boss_r(type) = ceil(corrected_radius(box_insert_r(type)) + box_wall(type));
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function box_sheet_slot(type) = sheet_thickness(box_sheets(type)) + sheet_slot_clearance; // add some clearance
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function box_corner_overlap(type) = box_wall(type);
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function box_corner_rad(type) = box_sheet_slot(type) - sheet_slot_clearance / 2 + box_corner_gap(type) + box_corner_overlap(type);
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function box_sheet_r(type) = box_corner_rad(type) - box_sheet_slot(type) - box_corner_overlap(type);
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function box_screw_length(type, top) =
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let(s = top ? box_top_sheet(type) : box_base_sheet(type))
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screw_length(box_screw(type), sheet_thickness(s) + box_corner_gap(type) + box_profile_overlap(type) - 1, washers = 2, insert = true, longer = true);
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function box_wall_clearance(type) = box_sheet_slot(type) / 2 - sheet_thickness(box_sheets(type)) / 2;
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function box_margin(type) = box_profile_overlap(type) + box_corner_gap(type); //! How much the bezel intrudes on the specified height
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function box_intrusion(type) = box_hole_inset(type) + box_boss_r(type); //! Corner profile intrusion
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function sheet_reduction(type) = 2 * box_corner_gap(type) + sheet_end_clearance;
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function box_outset(type) = box_sheet_slot(type) + box_wall(type) - sheet_slot_clearance / 2; //! How much the bezel expands the specified internal size
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function box_inset(type) = box_wall(type) + sheet_slot_clearance / 2; //! How much the bezel intrudes on the specified width and length, away from the corners
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function box_bezel_height(type, bottom) = //! Bezel height for top or bottom
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let(t1 = sheet_thickness(box_base_sheet(type)), t2 = sheet_thickness(box_top_sheet(type)))
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box_corner_rad(type) + box_profile_overlap(type) + (bottom ? max(t1, t2) : t2) - sheet_thickness(box_sheets(type));
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grill_hole = 5;
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grill_gap = 1.9;
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function box_grill_hole_r() = grill_hole / 2;
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module grill_hole_positions(width, height, r = 1000) {
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nx = floor(width / (grill_hole + grill_gap));
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xpitch = width / nx;
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ny = floor(height / ((grill_hole + grill_gap) * cos(30)));
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ypitch = height / ny;
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for(y = [0 : ny - 1], x = [0 : nx - 1 - (y % 2)]) {
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$x = -width / 2 + (x + 0.5 + (y % 2) / 2) * xpitch;
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$y = -height / 2 + (y + 0.5) * ypitch;
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if(sqrt(sqr($x) + sqr($y)) + grill_hole / 2 <= r)
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translate([$x, $y])
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children();
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}
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}
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module grill(width, height, r = 1000, poly = false, h = 0) { //! A staggered array of 5mm holes to make grills in sheets. Can be constrained to be circular. Set `poly` `true` for printing, `false` for milling.
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extrude_if(h)
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if(poly)
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grill_hole_positions(width, height, r)
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poly_circle(r = grill_hole / 2);
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else
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grill_hole_positions(width, height, r)
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circle(d = grill_hole);
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}
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module box_corner_profile_2D(type) { //! The 2D shape of the corner profile.
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t = box_sheet_slot(type);
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inset = box_corner_gap(type) + box_profile_overlap(type);
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difference() {
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union() {
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quadrant(box_hole_inset(type) + box_boss_r(type), box_boss_r(type)); // inside corner
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translate([inset, inset])
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rotate(180)
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quadrant(box_profile_overlap(type) + box_corner_rad(type), box_corner_rad(type)); // outside corner
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}
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translate([box_corner_gap(type), -t + sheet_slot_clearance / 2])
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square([100, t]);
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translate([-t + sheet_slot_clearance / 2, box_corner_gap(type)])
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square([t, 100]);
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}
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}
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module box_corner_profile(type) { //! Generates the corner profile STL for 3D printing.
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stl("box_corner_profile");
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length = box_height(type) - 2 * box_margin(type);
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difference() {
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linear_extrude(length, center = true, convexity = 5)
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box_corner_profile_2D(type);
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for(z = [-1, 1])
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translate([box_hole_inset(type), box_hole_inset(type), z * length / 2])
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insert_hole(box_insert(type), 5);
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}
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}
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module box_corner_profile_section(type, section, sections) { //! Generates interlocking sections of the corner profile to allow it to be taller than the printer
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overlap = 4;
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length = box_height(type) - 2 * box_margin(type);
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section_length = round_to_layer((length - overlap) / sections);
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last_section = section >= sections - 1;
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h = last_section ? length - (sections - 1) * section_length : section_length;
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overlap_wall = 2;
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difference() {
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union() {
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linear_extrude(h, convexity = 5)
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box_corner_profile_2D(type);
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if(!last_section) // male end always at the top
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translate_z(section_length - 1)
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for(i = [0 : 1], offset = i * layer_height)
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linear_extrude(overlap + 1 - offset)
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offset(1 + offset - layer_height)
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offset(-overlap_wall - 1)
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box_corner_profile_2D(type);
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}
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if(section > 0)
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translate_z(last_section ? h : 0) { // female at bottom unless last section
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linear_extrude(2 * (overlap + layer_height), center = true, convexity = 5)
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offset(-overlap_wall)
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box_corner_profile_2D(type);
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linear_extrude(2 * layer_height, center = true, convexity = 5)
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offset(-overlap_wall + layer_height)
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box_corner_profile_2D(type);
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}
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if(!section || last_section) // insert holes always at the bottom
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translate([box_hole_inset(type), box_hole_inset(type)])
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insert_hole(box_insert(type), 5);
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}
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}
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module box_corner_profile_sections(type, section, sections) { //! Generate four copies of a corner profile section
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stl("box_corner_profile");
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offset = box_boss_r(type) + 1;
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for(i = [0 : 3])
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rotate(i * 90)
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translate([offset, offset])
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box_corner_profile_section(type, section, sections);
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}
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module box_corner_quadrants(type, width, depth)
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for(corner = [0:3]) {
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x = [-1,1,1,-1][corner];
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y = [-1,-1,1,1][corner];
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translate([x * width / 2, y * depth / 2, 0])
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rotate(corner * 90)
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quadrant(box_intrusion(type), box_boss_r(type));
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}
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module box_bezel(type, bottom) { //! Generates top and bottom bezel STLs
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stl(bottom ? "bottom_bezel" : "top_bezel");
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feet = bottom && box_feet(type);
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t = box_sheet_slot(type);
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outset = box_outset(type);
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inset = box_inset(type);
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inner_r = box_sheet_r(type);
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cgap = box_corner_gap(type);
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foot_height = cgap + sheet_thickness(box_base_sheet(type)) + washer_thickness(box_washer(type)) + screw_head_height(box_screw(type)) + box_profile_overlap(type) + 2;
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foot_length = box_corner_rad(type) * 2;
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height = box_bezel_height(type, bottom);
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foot_extension = foot_height - height;
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difference() {
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w = box_width(type);
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d = box_depth(type);
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translate_z(-box_profile_overlap(type)) difference() {
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tw = w + 2 * outset;
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td = d + 2 * outset;
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rounded_rectangle([tw, td, feet ? foot_height : height], box_corner_rad(type), false);
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//
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// Remove edges between the feet
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//
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if(feet)
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hull() {
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translate_z(height + 0.5)
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cube([w - 2 * foot_length, td + 1, 1], center = true);
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translate_z(foot_height + 1)
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cube([w - 2 * (foot_length - foot_extension), td + 1, 1], center = true);
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}
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if(feet)
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hull() {
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translate_z(height + 0.5)
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cube([tw + 1, d - 2 * foot_length, 1], center = true);
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translate_z(foot_height + 1)
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cube([tw + 1, d - 2 * (foot_length - foot_extension), 1], center = true);
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}
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}
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//
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// slots for side panels
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//
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translate_z(-box_profile_overlap(type))
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linear_extrude(2 * box_profile_overlap(type), center = true)
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for(i = [-1, 1]) {
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translate([i * (w + t - sheet_slot_clearance) / 2, 0])
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square([t, d - 2 * cgap], center = true);
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translate([0, i * (d + t - sheet_slot_clearance) / 2])
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square([w - 2 * cgap, t], center = true);
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}
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//
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// recess for top / bottom panel
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//
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translate_z(cgap)
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rounded_rectangle([w + bezel_clearance, d + bezel_clearance, height], inner_r + bezel_clearance / 2, false);
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//
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// leave plastic over the corner profiles
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//
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translate_z(-box_profile_overlap(type) - 1)
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linear_extrude(box_profile_overlap(type) + cgap + 2)
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union() {
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difference() {
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square([w - 2 * inset,
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d - 2 * inset], center = true);
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box_corner_quadrants(type, w, d);
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}
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box_screw_hole_positions(type)
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poly_circle(screw_clearance_radius(box_screw(type)));
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}
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}
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}
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dowel_length = 20;
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dowel_wall = extrusion_width * 3;
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dowel_h_wall = layer_height * 6;
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module box_bezel_section(type, bottom, rows, cols, x, y) { //! Generates interlocking sections of the bezel to allow it to be bigger than the printer
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tw = box_width(type) + 2 * box_outset(type);
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w = tw / cols;
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th = box_depth(type) + 2 * box_outset(type);
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h = th / rows;
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bw = box_outset(type) - bezel_clearance / 2;
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bw2 = box_outset(type) + box_inset(type);
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dw = bw - 2 * dowel_wall;
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dh = box_bezel_height(type, bottom) - dowel_h_wall;
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profile_overlap = box_profile_overlap(type);
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dh2 = profile_overlap + box_corner_gap(type) - dowel_h_wall;
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end_clearance = 0.5;
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module male() {
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rotate([90, 0, 90])
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linear_extrude(dowel_length - 2 * end_clearance, center = true)
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difference() {
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union() {
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h1 = dh - layer_height;
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h2 = dh2 - layer_height;
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hull() {
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translate([bw / 2, h1 / 2])
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square([dw - 1, h1], center = true);
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translate([bw / 2, (h1 - 1) / 2])
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square([dw, h1 - 1], center = true);
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}
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hull() {
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translate([bw2 / 2, h2 / 2])
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square([bw2 - 2 * dowel_wall - 1, h2], center = true);
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translate([bw2 / 2, (h2 - 1) / 2])
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square([bw2 - 2 * dowel_wall, h2 - 1], center = true);
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}
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}
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translate([bw2 / 2, 0])
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square([box_sheet_slot(type), 2 * profile_overlap], center = true);
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}
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}
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module female() {
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union() {
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translate([0, bw / 2, dh / 2])
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cube([dowel_length, dw, dh], center = true);
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translate([0, bw2 / 2])
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cube([dowel_length, bw2 - 2 * dowel_wall, dh2 * 2], center = true);
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hull() {
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translate([0, bw / 2, dh / 2])
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cube([2, dw, dh], center = true);
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translate([0, bw / 2, dh / 2])
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cube([eps, dw + 2 * extrusion_width, dh], center = true);
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}
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hull() {
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translate([0, bw2 / 2, dh2 / 2])
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cube([2, bw2 - 2 * dowel_wall, dh2], center = true);
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translate([0, bw2 / 2, dh2 / 2])
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cube([eps, bw2 - 2 * dowel_wall + 2 * extrusion_width, dh2], center = true);
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}
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}
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}
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module support() {
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if(!$preview)
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translate([0, bw / 2 + dw / 2])
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cube([dowel_length / 2 - 0.25, 2 * extrusion_width + 0.2, dh2]);
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}
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union() {
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render() difference() {
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union() {
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clip(xmin = 0, xmax = w, ymin = 0, ymax = h)
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translate([tw / 2 - x * w, th / 2 - y * h, profile_overlap])
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box_bezel(type, bottom);
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if(x < cols - 1 && y == 0)
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translate([w, 0])
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male();
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if(x > 0 && y == rows - 1)
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translate([0, h])
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rotate(180)
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male();
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if(y < rows - 1 && x == cols - 1)
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translate([w, h])
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rotate(90)
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male();
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if(y > 0 && x == 0)
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rotate(-90)
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male();
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}
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if(x < cols - 1 && y == rows - 1)
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translate([w, h])
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rotate(180)
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female();
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if(x > 0 && y == 0)
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female();
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if(y < rows - 1 && x == 0)
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translate([0, h])
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rotate(-90)
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female();
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if(y > 0 && x == cols - 1)
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translate([w, 0])
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rotate(90)
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female();
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}
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if(x < cols - 1 && y == rows - 1)
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translate([w, h])
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rotate(180)
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support();
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if(x > 0 && y == 0)
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support();
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if(y < rows - 1 && x == 0)
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translate([0, h])
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rotate(-90)
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support();
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if(y > 0 && x == cols - 1)
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translate([w, 0])
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rotate(90)
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support();
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}
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}
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module box_screw_hole_positions(type) {
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inset = box_hole_inset(type);
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w = box_width(type) / 2 - inset;
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d = box_depth(type) / 2 - inset;
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for(x = [-1, 1], y = [-1, 1])
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translate([x * w, y * d])
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children();
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}
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module box_base_blank(type) { //! Generates a 2D template for the base sheet
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dxf("box_base");
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difference() {
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sheet_2D(box_base_sheet(type), box_width(type), box_depth(type), box_sheet_r(type));
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box_screw_hole_positions(type)
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drill(screw_clearance_radius(box_screw(type)), 0);
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}
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}
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|
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module box_top_blank(type) { //! Generates a 2D template for the top sheet
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dxf("box_top");
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|
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difference() {
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sheet_2D(box_top_sheet(type), box_width(type), box_depth(type), box_sheet_r(type));
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|
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box_screw_hole_positions(type)
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drill(screw_clearance_radius(box_screw(type)), 0);
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}
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}
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|
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function subst_sheet(type, sheet) =
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let(s = box_sheets(type))
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sheet ? assert(sheet_thickness(sheet) == sheet_thickness(s)) sheet : s;
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module box_shelf_blank(type, sheet = false) { //! Generates a 2D template for a shelf sheet
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dxf("box_shelf");
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|
|
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difference() {
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sheet_2D(subst_sheet(type, sheet), box_width(type) - bezel_clearance, box_depth(type) - bezel_clearance, 1);
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|
|
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offset(bezel_clearance / 2)
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box_corner_quadrants(type, box_width(type), box_depth(type));
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}
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}
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|
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module box_shelf_screw_positions(type, screw_positions, thickness = 0, wall = undef) { //! Place children at the shelf screw positions
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w = is_undef(wall) ? box_wall(type) : wall;
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insert = box_shelf_insert(type);
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translate_z(-insert_boss_radius(insert, w))
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|
for(p = screw_positions)
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|
multmatrix(p)
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|
translate_z(thickness)
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|
children();
|
|
}
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|
|
|
module box_shelf_bracket(type, screw_positions, wall = undef) { //! Generates a shelf bracket, the first optional child is a 2D cutout and the second 3D cutouts
|
|
stl("shelf_bracket");
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|
w = is_undef(wall) ? box_wall(type) : wall;
|
|
insert = box_shelf_insert(type);
|
|
lip = 2 * insert_boss_radius(insert, w);
|
|
width = insert_length(insert) + w;
|
|
|
|
module shape()
|
|
difference() {
|
|
square([box_width(type), box_depth(type)], center = true);
|
|
|
|
offset(bezel_clearance / 2)
|
|
box_corner_quadrants(type, box_width(type), box_depth(type));
|
|
|
|
if($children)
|
|
hflip()
|
|
children();
|
|
}
|
|
|
|
module boss()
|
|
translate_z(-width + eps)
|
|
linear_extrude(width - 2 * eps)
|
|
hull() {
|
|
circle4n(r = lip / 2 - eps);
|
|
|
|
translate([-lip / 2, -lip / 2 + eps])
|
|
square([lip, eps]);
|
|
}
|
|
|
|
difference() {
|
|
union() {
|
|
linear_extrude(w)
|
|
difference() {
|
|
shape()
|
|
if($children)
|
|
children(0);
|
|
|
|
round(2) offset(-width)
|
|
shape()
|
|
if($children)
|
|
children(0);
|
|
}
|
|
|
|
linear_extrude(lip)
|
|
difference() {
|
|
shape()
|
|
if($children)
|
|
children(0);
|
|
|
|
offset(-w)
|
|
shape()
|
|
if($children)
|
|
children(0);
|
|
}
|
|
|
|
hflip()
|
|
box_shelf_screw_positions(type, screw_positions, 0, w)
|
|
boss();
|
|
}
|
|
if($children > 1)
|
|
hflip()
|
|
children(1);
|
|
|
|
hflip()
|
|
box_shelf_screw_positions(type, screw_positions, 0, w)
|
|
insert_hole(insert, counterbore = 1, horizontal = true);
|
|
}
|
|
}
|
|
|
|
module box_shelf_bracket_section(type, rows, cols, x, y) { //! Generates sections of the shelf bracket to allow it to be bigger than the printer
|
|
tw = box_width(type);
|
|
w = tw / cols;
|
|
th = box_depth(type);
|
|
h = th / rows;
|
|
|
|
clip(xmin = 0, xmax = w, ymin = 0, ymax = h)
|
|
translate([tw / 2 - x * w, th / 2 - y * h])
|
|
children();
|
|
}
|
|
|
|
module box_left_blank(type, sheet = false) { //! Generates a 2D template for the left sheet, `sheet` can be set to override the type
|
|
dxf("box_left");
|
|
|
|
sheet_2D(subst_sheet(type, sheet), box_depth(type) - sheet_reduction(type), box_height(type) - sheet_reduction(type), 1);
|
|
}
|
|
|
|
module box_right_blank(type, sheet = false) { //! Generates a 2D template for the right sheet, `sheet` can be set to override the type
|
|
dxf("box_right");
|
|
|
|
sheet_2D(subst_sheet(type, sheet), box_depth(type) - sheet_reduction(type), box_height(type) - sheet_reduction(type), 1);
|
|
}
|
|
|
|
module box_front_blank(type, sheet = false) { //! Generates a 2D template for the front sheet, `sheet` can be set to override the type
|
|
dxf("box_front");
|
|
|
|
sheet_2D(subst_sheet(type, sheet), box_width(type) - sheet_reduction(type), box_height(type) - sheet_reduction(type), 1);
|
|
}
|
|
|
|
module box_back_blank(type, sheet = false) { //! Generates a 2D template for the back sheet, `sheet` can be set to override the type
|
|
dxf("box_back");
|
|
|
|
sheet_2D(subst_sheet(type, sheet), box_width(type) - sheet_reduction(type), box_height(type) - sheet_reduction(type), 1);
|
|
}
|
|
|
|
module box_base(type) render_2D_sheet(box_base_sheet(type)) box_base_blank(type); //! Default base, can be overridden to customise
|
|
module box_top(type) render_2D_sheet(box_top_sheet(type)) box_top_blank(type); //! Default top, can be overridden to customise
|
|
module box_back(type) render_2D_sheet(box_sheets(type)) box_back_blank(type); //! Default back, can be overridden to customise
|
|
module box_front(type) render_2D_sheet(box_sheets(type)) box_front_blank(type); //! Default front, can be overridden to customise
|
|
module box_left(type) render_2D_sheet(box_sheets(type)) box_left_blank(type); //! Default left side, can be overridden to customise
|
|
module box_right(type) render_2D_sheet(box_sheets(type)) box_right_blank(type); //! Default right side, can be overridden to customise
|