// PRUSA iteration3
// LCD Knob
// GNU GPL v3
// Josef Průša <iam@josefprusa.cz> and contributors
// http://www.reprap.org/wiki/Prusa_Mendel
// http://prusamendel.org

difference()
{
    // main body
    translate([0, 0, 0]) rotate(a = [0, 0, 0]) cylinder(h = 7.5, r1 = 10, r = 7.25, $fn = 60);
    translate([0, 0, 20]) rotate(a = [0, 0, 0]) sphere(14);

    // knob cutout
    translate([0, 0, -0.1]) rotate(a = [0, 0, 0]) cylinder(h = 4.6, d = 6.1, $fn = 60);
    translate([0, 0, -0.1]) rotate(a = [0, 0, 0]) cylinder(h = 0.6, d1 = 7.1, d2 = 6.1 , $fn = 30);
    translate([0, 0.75, -0.1]) rotate(a = [0, 0, -90]) cube([1.5, 5.3, 4.6]);

    // first layer correction
    union()
    {
        difference()
        {
            translate([0, 0, -0.1]) rotate(a = [0, 0, 0]) cylinder(h = 2, d1 = 11.5, d2 = 10.5, $fn = 60);
            translate([0, 0, -0.15]) rotate(a = [0, 0, 0]) cylinder(h = 2, d1 = 9.5, d2 = 10.5, $fn = 60);
            translate([0, 0, 1]) rotate(a = [0, 0, 0]) cylinder(h = 2, d = 13, $fn = 30);
            translate([-13.5, -6, -0.1]) rotate(a = [0, 0, 0]) cube([10, 12, 4.6]);
        }
    }

    difference()
    {
        translate([0, 0, -0.1]) rotate(a = [0, 0, 0]) cylinder(h = 4.6, d = 11, $fn = 60);
        translate([0, 0, -0.1]) rotate(a = [0, 0, 0]) cylinder(h = 4.6, d = 10, $fn = 60);
        translate([-13.5, -6, -0.1]) rotate(a = [0, 0, 0]) cube([10, 12, 4.6]);
    }
}

// handle
difference()
{
    translate([-2.1, 6.5, 0]) rotate(a = [0, 0, 0]) cube([4.2, 12, 7.5]);
    translate([-2.5, 15, 7.7]) rotate(a = [-67, 0, 0]) cube([5.5, 11, 7.5]);
    translate([-2.2, 18.22, -0.1]) rotate(a = [0, 0, 0]) cube([4.4, 12, 0.21]);
}