sixteenmillimeter-tools/models/lomo_spindle_bottom/lomo_spindle_bottom.scad

91 lines
1.9 KiB
OpenSCAD

t = 0;
include <../../libraries/threads.scad>;
//RESOLUTION
FINE = 200;
module base ( HEX = false) {
D = 8.45 * 2;
H = 20;
//for grip
BUMP = 2; //diameter
BUMPS = 6;
TOP_D = 19;
TOP_H = 9.5;
TOP_OFFSET = -24.5;
union() {
translate([0, 0, -15]) {
cylinder(r = D / 2, h = H, center = true, $fn = FINE);
}
//hex version
if (HEX) {
translate([0, 0, TOP_OFFSET]) {
cylinder(r = 11.1, h = TOP_H, center = true, $fn = 6);
}
} else {
translate([0, 0, TOP_OFFSET]) {
cylinder(r = TOP_D / 2, h = TOP_H, center = true, $fn = FINE);
}
}
for (i = [0 : BUMPS]) {
rotate([0, 0, (360 / BUMPS) * i]) {
translate([0, 8.9, TOP_OFFSET]) {
cylinder(r = BUMP, h = TOP_H, center = true, $fn = 60);
}
}
}
}
}
module outer_screw (LEN) {
OD = 10;
PITCH = 1.5;
THREAD = 1.6;
difference () {
translate([0, 0, -7.1]) metric_thread (diameter=OD, pitch=PITCH, thread_size = THREAD, length=LEN);
//bevel top of screw
translate([0, 0, LEN - 8]) difference() {
cylinder(r = 8, h = 3, center = true, $fn = FINE);
cylinder(r1 = 6, r2 = 3, h = 3.01, center = true, $fn = FINE);
}
}
}
module lomo_spindle_bottom (ALT = false, HEX = false) {
OD = 13.6 + .5;
PITCH = 1.5;
THREAD = 1.6;
IN_LEN = 21;
LEN = 17.1;
ALT_LEN = 27.1;
difference () {
base(HEX);
//inner screw negative
translate([0, 0, -30]) union() {
metric_thread (diameter=OD, pitch=PITCH, thread_size = THREAD, length = IN_LEN);
translate([0, 0, 0.2]) {
metric_thread (diameter=OD, pitch=PITCH, thread_size = THREAD, length = IN_LEN);
}
}
}
difference () {
//outer screw
if (ALT) {
outer_screw(ALT_LEN);
} else {
outer_screw(LEN);
}
//hollow center
cylinder(r = 3.8 / 2, h = 100, center = true, $fn = 60);
}
}
translate([0, 0, 29]) rotate([0, 0, t]) lomo_spindle_bottom();