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portedbox_template.scad
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portedbox_template.scad
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/* loudspeaker __MODEL__ */
loudspeaker_number = __NUMBER__;
margin = __MARGIN__; /* mm */
loudspeaker_diameter = __DIAMETER__; /* mm */
internal_ported_box_volume = __PORTEDBOXVOLUME__; /* dm³ (Liter) */
ported_box_port_number = __PORTEDBOXPORTNUMBER__;
ported_box_port_slot_activated = __PORTEDBOXPORTSLOTACTIVATED__;
ported_box_port_slot_width = __PORTEDBOXPORTSLOTWIDTH__; /* mm */
ported_box_port_slot_height = __PORTEDBOXPORTSLOTHEIGHT__; /* mm */
ported_box_port_diameter = __PORTEDBOXPORTDIAMETER__; /* mm */
ported_box_port_length = __PORTEDBOXPORTLENGTH__; /* mm */
wood_thick = __WOODTHICK__; /* mm */
wood_color = "wheat";
internal_ported_box_width = loudspeaker_diameter + margin; /* mm (x)*/
internal_ported_box_height = max((ported_box_port_diameter + margin) + ((loudspeaker_diameter + margin) * loudspeaker_number), 1.618 * internal_ported_box_width); /* mm (z)*/
internal_ported_box_depth = internal_ported_box_volume * 1000000 / (internal_ported_box_width * internal_ported_box_height); /* mm (y)*/
vertical_center = (internal_ported_box_height + (2 * wood_thick)) / 2;
horizontal_center = (internal_ported_box_width + (2 * wood_thick)) / 2;
module speaker_hole(diameter, x, z)
{
translate([x, 0, z]) {
rotate([90, 0, 0]) {
color("black") {
cylinder($fn=360, h = 2 * wood_thick, r1 = diameter / 2, r2 = diameter / 2, center=true);
}
}
}
}
module port_hole(diameter, slot, width, height, x, z)
{
if (ported_box_port_slot_activated == true) {
translate([x, 0, z]) {
color("black") {
cube([width, 2 * wood_thick, height]);
}
}
} else {
translate([x, 0, z]) {
rotate([90, 0, 0]) {
color("black") {
cylinder($fn=360, h = 2 * wood_thick, r1 = diameter / 2, r2 = diameter / 2, center=true);
}
}
}
}
}
module closed_enclosure(width, height, depth)
{
difference() {
/* external dimentions */
color(wood_color) {
cube([width + (2 * wood_thick), depth + (2 * wood_thick), height + (2 * wood_thick)]);
}
/* internal dimentions */
translate([wood_thick, wood_thick, wood_thick]) {
color(wood_color) {
cube([width, depth, height]);
}
}
}
}
difference() {
closed_enclosure(internal_ported_box_width, internal_ported_box_height, internal_ported_box_depth);
/* calculate ports distribition */
port_placing = (internal_ported_box_width + (2 * wood_thick)) / (ported_box_port_number + 1);
for (i = [1:ported_box_port_number]) {
if (ported_box_port_slot_activated == false) {
/* circular ports, center is used */
port_hole(ported_box_port_diameter, ported_box_port_slot_activated, ported_box_port_slot_width, ported_box_port_slot_height, i * port_placing, wood_thick + margin + ported_box_port_diameter / 2);
} else {
/* slot ports, left corner is used */
port_hole(ported_box_port_diameter, ported_box_port_slot_activated, ported_box_port_slot_width, ported_box_port_slot_height, (i * port_placing) - (ported_box_port_slot_width / 2),wood_thick);
}
}
/* loudpeakers distribution */
for (i = [0:loudspeaker_number-1]) {
if (ported_box_port_slot_activated == false) {
speaker_hole(loudspeaker_diameter, horizontal_center, margin + (loudspeaker_diameter / 2) + (ported_box_port_diameter + margin) + i * (loudspeaker_diameter + margin));
} else {
speaker_hole(loudspeaker_diameter, horizontal_center, margin + (loudspeaker_diameter / 2) + ported_box_port_slot_height + i * (loudspeaker_diameter + margin));
}
}
}