split_reel/split_reel.scad

include <./common/common.scad>;
include <./common/threads.scad>;

Core16mm = 25.5;
PlatterThickness = 1.6;
Platter120m = 178;

module thread_16mm ( pos = [0, 0, 0], length = 11, chamfer = false, pad = 0) {
    translate(pos) {
        if (chamfer) {
           metric_thread (diameter=18.5, pitch=1.5, length=length, internal=false, n_starts=1, thread_size=-1, groove=false, square=false, rectangle=0, angle=30, taper=0, leadin=2, leadfac=1.5);
        } else {
            metric_thread (diameter=18.5, pitch=1.5, length=length, internal=false, n_starts=1, thread_size=-1, groove=false, square=false, rectangle=0, angle=30, taper=0, leadin=0, leadfac=1.5);
        }
    }
}

module threaded_core (pos = [0, 0, 0], format = "16mm") {
    $fn = 120;
    translate (pos) {
        if (format == "16mm") {
            union () {
                cylinder(r = R(Core16mm), h = 6, center = true);
                thread_16mm([0, 0, 1.5], length = 14, chamfer = true);
            }  
        }
    }
}

module socket_core (pos = [0, 0, 0], format = "16mm") {
    $fn = 120;
    translate (pos) {
        if (format == "16mm") {
            difference () {
                cylinder(r = R(Core16mm), h = 11, center = true);
            }
        }
    }
}

module platter (pos = [0, 0, 0], length = 120) {
    if (length == 120) {
        difference () {
            cylinder(r = R(Platter120m), h = PlatterThickness, center = true, $fn = 300);
            for (i = [0 : 3]) {
                rotate([0, 0, i * 90]) translate([105 / 2, 0, 0]) cylinder(r = R(44.5), h = PlatterThickness + 1, center = true, $fn = 100);
            }
        }
    }
}

//length in meters
module split_reel (format = "16mm", length = 120, half = "A") {

    if (half == "A") {
        difference () {
            union () {
                platter([0, 0, 0], length = length);
                threaded_core([0, 0, (PlatterThickness / 2) + (6 / 2)], format = "16mm");
                rotate([0, 0, 135]) translate([18.5, 0, (PlatterThickness / 2) + (4.75 / 2)]) cylinder(r = R(6.25), h = 4.75, center = true, $fn = 60);
            }
            if (format == "16mm") {
                cube([8.5, 8.5, 50], center = true);
                rotate([0, 0, 45]) translate([5.5, 0, 0]) cube([3, 3, 50], center = true);
            }
        }
    } else if (half == "B") {
        difference () {
            union () {
                platter([0, 0, 0], length = length);
                socket_core([0, 0, (PlatterThickness / 2) + (11 / 2)], format = "16mm");
            }
            rotate([180, 0, 0]) scale([1.02, 1.02, 1]) {
                thread_16mm([0, 0, -13], 15);
                thread_16mm([0, 0, -13.1], 15);
            }
        }
    }
}

PART = "split_reel_16mm_120m_A";

if (PART == "split_reel_16mm_120m_A") {
    split_reel("16mm", 120, "A");
} else if (PART == "split_reel_16mm_120m_B") {
    split_reel("16mm", 120, "B");
}