Schraube im Zeitraffer

module screw(type = 2, r1 = 15, r2 = 20, n = 7, h = 100, t = 8)
{
    linear_extrude(height = h, twist = 360*t/n, convexity = t)
    difference() {
        circle(r2);
        for (i = [0:n-1]) {
            if (type == 1) rotate(i*360/n) polygon([
                        [ 2*r2, 0 ],
                        [ r2, 0 ],
                        [ r1*cos(180/n), r1*sin(180/n) ],
                        [ r2*cos(360/n), r2*sin(360/n) ],
                        [ 2*r2*cos(360/n), 2*r2*sin(360/n) ],
            ]);
            if (type == 2) rotate(i*360/n) polygon([
                        [ 2*r2, 0 ],
                        [ r2, 0 ],
                        [ r1*cos(90/n), r1*sin(90/n) ],
                        [ r1*cos(180/n), r1*sin(180/n) ],
                        [ r2*cos(270/n), r2*sin(270/n) ],
                        [ 2*r2*cos(270/n), 2*r2*sin(270/n) ],
            ]);
        }
    }
}
 
module nut(type = 2, r1 = 16, r2 = 21, r3 = 30, s = 6, n = 7, h = 100/5, t = 8/5)
{
    difference() {
            cylinder($fn = s, r = r3, h = h);
            translate([ 0, 0, -h/2 ]) screw(type, r1, r2, n, h*2, t*2);
    }
}
 
module nut2(type = 2, r1 = 16, r2 = 21, r3 = 30, s = 6, n = 7, h = 100/5, t = 8/5)
{
    {
            cylinder($fn = s, r = r3, h = h);
    }
}
translate([ -30, 0, 0 ]) {
screw();
nut2();
}
translate([ 40, 0, 0 ])
nut();

Quelle: https://cccgoe.de/w/index.php?title=3D-Drucker/Schraube