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second=70;
r_final_gear=second/2 - 5;
r_motor_gear=3;
bublator_width=0.4 * second;
bublator_length=2*r_final_gear;
r_hat=150/2;
// dimensions of the nails used as pins and axis
r_nail=1.4/2;
r_nail_head=2.5/2;
$fn=100;
module nail_rail() {
cube([5, 200, 2], center=true);
translate([0, 0, -1.99]) cube([2, 200, 2], center=true);
}
module motor_gear(angle=0) {
r=r_motor_gear;
rotate(angle)
difference() {
// the actual gear
cylinder(r=r, h=5, center=true);
// pulley rim
difference() {
cylinder(r=r+1, h=3, center=true);
cylinder(r=r-0.5, h=5, center=true);
}
difference() {
cylinder(r=r+1, h=2, center=true);
cylinder(r=r-1.0, h=5, center=true);
}
// central nail hole
cylinder(r=r_nail, h=100, center=true);
translate([0, 0, -4]) cylinder(r=r_nail_head, h=2);
}
}
module final_gear(angle=0) {
r=r_final_gear;
rotate(angle)
difference() {
// the actual gear
cylinder(r=r, h=5, center=true);
// pulley rim
difference() {
cylinder(r=r+1, h=3, center=true);
cylinder(r=r-0.5, h=5, center=true);
}
difference() {
cylinder(r=r+1, h=2, center=true);
cylinder(r=r-1.0, h=5, center=true);
}
// air hole
translate([0, -r/2, 0])
cylinder(r=0.4 * bublator_width, h=10, center=true);
// excentrical nail hole
translate([0, r-3, 0]) {
cylinder(r=r_nail, h=100, center=true);
translate([0, 0, 1]) cylinder(r=r_nail_head, h=2);
}
// central nail hole
cylinder(r=r_nail, h=100, center=true);
translate([0, 0, -4]) cylinder(r=r_nail_head, h=2);
}
}
module bublator(angle=0) {
r=bublator_width;
color([0, 0.7, 0])
translate([0, (r_final_gear-3) * (cos(angle) - 1), 0])
difference() {
union() {
cube([bublator_width, bublator_length, 5], center=true);
translate([0, bublator_length/2 - 3, 0]) cube([r_final_gear*2 + 5, 10, 5], center=true);
}
// bubble hole
translate([0, r_final_gear/2 - bublator_length/2, 0]) {
cylinder(r=0.4 * bublator_width, h=10, center=true);
// nipple array ... hooray
for (i = [1:30])
for (j = [-1,1])
rotate(i * 360/30)
translate([0, 0.4 * bublator_width - 0.5, 0])
rotate([90 + j*70, 0, 0])
rotate([0, 0, 45])
cylinder(r1=0, r2=3.5, h=6, center=true, $fn=100);
}
// nail hole
translate([0, bublator_length/2 - 3, 0])
cube([2*(r_final_gear - 2), 2.5 * r_nail, 50], center=true);
}
}
module assembly_clearance() {
translate([0, 18, -1])
linear_extrude(170)
minkowski() {
square(0.3, center=true);
projection()
rotate([90,0,0]) moving_assembly();
}
}
module arc(r, d) {
intersection() {
translate([0, -r + d, 0]) circle(r);
translate([0, 500]) square([1000, 1000], center=true);
}
}
module tank() {
color([0.3, 0.3, 0.9])
translate([0, -18, -2*r_final_gear])
difference() {
union() {
// bottom
linear_extrude(1.5) arc(r_hat, 30);
// flooding protection floor
translate([0, 0, 2*r_final_gear - 2])
linear_extrude(1.5) arc(r_hat, 30);
// walls
linear_extrude(4 * r_final_gear + 2)
difference() {
arc(r_hat, 30);
translate([0, 1.5, 0]) arc(r_hat, 27);
}
// bublator_rails
for (i = [-1,1])
translate([i*r_final_gear, 18, 2*r_final_gear + 0.5])
rotate(-i*25)
cube([10, 10, 4*r_final_gear], center=true);
// gear holding protrusion
translate([0,0,1.6*r_final_gear])
intersection() {
rotate([-90, 0, 0])
translate([0, -20, 0])
cylinder(r=r_final_gear, h=70, center=true);
translate([0, 5, 30])
cube([100, 9.7, 40], center=true);
}
}
// rear air hole
translate([0,0,1.6*r_final_gear])
rotate([-90, 0, 0])
translate([0, -27, 0])
cylinder(r=0.4*r_final_gear, h=50, center=true);
// front air hole
translate([0,0,1.6*r_final_gear])
rotate([-90, 0, 0])
translate([0, -27, 30])
rotate([30, 0, 0])
cylinder(r1=0.31*r_final_gear, r2=0.85*r_final_gear, h=30, center=true);
assembly_clearance();
// pulley clearance
translate([-r_final_gear - 90, 11, 2*r_final_gear])
cube([100, 3, 2*r_final_gear - 2]);
// gear axis hole
translate([0, 20, 3 * r_final_gear])
rotate([90, 0, 0])
cylinder(r=r_nail, h=100);
// bublator screw assembly hole
translate([0, 0, 4*r_final_gear])
rotate([90, 0, 0])
cylinder(r=20, h=30, center=true);
}
}
module cage() {
linear_extrude(2*r_final_gear)
assembly_clearance();
tank();
}
module moving_assembly(angle=0) {
// distance 0.25 mm between objects
translate([0, 0, 5.25]) final_gear(a);
translate([0, -bublator_length/2 + second/2 - 5, 0]) bublator(a);
}
a=$t * 1000;
translate([0, 0, r_final_gear])
rotate([90, 0, 0])
moving_assembly(a);
tank();
translate([-70, -5, r_final_gear - 20])
rotate([90, 0, 0])
motor_gear();
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