我が家の水切り固定用パーツ。

dish-drainer-support3.scad

$fa = 0.01;

distance_y = 3.5;
pole_radius = 7;

thickness = 3;
outline_radius = 20;

pole_center = [outline_radius, distance_y + pole_radius];

l0_height = 5;
l1_height = 6;
l2_height = thickness;
l3_height = 10;

l1_face_z = l1_height * -1;
l2_face_z = 0;
l3_face_z = l2_height;
l0_face_z = l1_face_z - l0_height;

// layer 3
translate([0, 0, l3_face_z]) {
    linear_extrude(l3_height) {
        difference() {
            translate(pole_center)
                circle(pole_radius + thickness);
            translate(pole_center)
                circle(pole_radius);
        }
    }
}

module l2_semicircle() {
    translate(pole_center) {
        difference() {
            circle(outline_radius);
            translate([0, outline_radius / -2])
                square([outline_radius * 2, outline_radius], center=true);
        }
    }
}

// layer 2
translate([0, 0, l2_face_z]) {
    linear_extrude(l2_height) {
        difference() {
            union() {
                l2_semicircle();
                square([outline_radius * 2, pole_center[1]]);
                translate([0, thickness * -1])
                    square([outline_radius * 2, thickness]);
            }
            translate(pole_center)
                circle(pole_radius);
        }
    }
}

// layer 1
translate([0, 0, l1_face_z]) {
    linear_extrude(l1_height)
        translate([0, thickness * -1])
            square([outline_radius * 2, thickness]);
}

// layer 0
translate([0, 0, l0_face_z]) {
    linear_extrude(l0_height)
        translate([0, -9])
            square([thickness, thickness]);
}