hanger.scad
6.05 KB
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include <libs/polyround.scad>
include <libs/uploads_6f_12_f1_10_d2_ISOThread.scad>
// Author: Hubert Berezowski
// Copyright: 2018
// License: GPL 3
/////////////////////////////////////////////////////////////////// switch settings:
// milling or printing ?? //////////////////////////////////////////////////////////
/* include <conf.milling.scad> */
include <conf.printing.scad>
// output
difference() {
hanger_wedge_plate();
hub_grove();
fixing_pin();
tensioner_thread();
}
// tensioner thread hole
module tensioner_thread() {
difference() {
translate([HANGER_WIDTH / 2, FIX_PLATE_SPAN_Y + HANGER_THREAD_OFFSET , -1]){
cylinder(h = 20, d = HANGER_THREAD_DIAMETER + TT, center = false, $fn = fn);
}
if ( TYPE == "PRINTING" ){
translate([HANGER_WIDTH / 2, FIX_PLATE_SPAN_Y + HANGER_THREAD_OFFSET , -1])
thread_in_pitch(HANGER_THREAD_DIAMETER + TT, HANGER_HEIGHT+3, 1);
}
}
}
// fixing pin hole
module fixing_pin() {
ankathete = FIX_OFFSET / tan(22.5);
translate([FIX_PLATE_SPAN_X, 0, 0]){
translate([ -ankathete, FIX_OFFSET, -1 ]){
cylinder(h = 20, d = FIX_PIN_DIAMETER + TT, center = false, $fn = fn);
cylinder(h = FIX_PLATE_HEIGHT - FIX_PIN_HEAD_RECESS_HEIGHT + 1, d = FIX_PIN_HEAD_DIAMETER + TT, center = false, $fn = fn);
}
}
}
// hub groove
module hub_grove() {
union() {
if ( TYPE == "MILLING" ){
hull() {
translate([ HUB_OFFSET_X, HUB_OFFSET_Y, 0 ]){
cylinder(h = 20, d = HUB_DIAMETER + T, center = true, $fn = fn);
}
translate([ HUB_OFFSET_X, FIX_PLATE_SPAN_Y + T, 0 ]){
cylinder(h = 20, d = HUB_DIAMETER + T, center = true, $fn = fn);
}
}
}
if ( HUB_DIAMETER_SPACER > 0 ) {
translate([ HUB_OFFSET_X, HUB_OFFSET_Y, FIX_PLATE_HEIGHT - HUB_DIAMETER_FRAME_SPACER_HEIGHT]){
cylinder(h = HUB_DIAMETER_FRAME_SPACER_HEIGHT + 1, d = HUB_DIAMETER_FRAME_SPACER + TT, center = false, $fn = fn);
}
translate([ HUB_OFFSET_X, HUB_OFFSET_Y, -1]){
cylinder(h = 10, d = HUB_DIAMETER_SPACER + TT, center = false, $fn = fn);
}
translate([ HUB_OFFSET_X, HUB_OFFSET_Y, FIX_PLATE_HEIGHT - ( HUB_DIAMETER_FRAME_SPACER_HEIGHT + HUB_DIAMETER_SPACER_HEIGHT + 10) ]){
cylinder(h = 10, d = 20 + TT, center = false, $fn = fn);
}
}
}
}
// hanger wedge plate
module hanger_wedge_plate() {
fix_plate_shape = [ [ FIX_PLATE_EDGE + T, FIX_PLATE_EDGE + T, FRAME_INNER_RADIUS_NEAR_HUB]
, [ FIX_PLATE_SPAN_X - ( FIX_PLATE_EDGE / tan(22.5) + T / tan(22.5) )
, FIX_PLATE_EDGE + T
, FIX_OFFSET-FIX_PLATE_EDGE ]
, [ FIX_PLATE_EDGE + T, FIX_PLATE_SPAN_X - ( FIX_PLATE_EDGE / tan(22.5) + T / tan(22.5) ),0]
];
hanger_shape = [ [ T, FIX_PLATE_SPAN_Y - FRAME_OUTER_RADIUS_NEAR_HANGER + T, 0]
, [ FRAME_OUTER_RADIUS_NEAR_HANGER - cos(45) * FRAME_OUTER_RADIUS_NEAR_HANGER + T
, FIX_PLATE_SPAN_Y - FRAME_OUTER_RADIUS_NEAR_HANGER + sin(45)*FRAME_OUTER_RADIUS_NEAR_HANGER + T
, 0
]
, [ FRAME_OUTER_RADIUS_NEAR_HANGER + T, FIX_PLATE_SPAN_Y + T, 0]
, [ HANGER_WIDTH - T, FIX_PLATE_SPAN_Y + T, 0]
, [ HANGER_WIDTH - T, FIX_PLATE_SPAN_Y + HANGER_SPAN - T, HANGER_WIDTH/2 - T]
, [ T, FIX_PLATE_SPAN_Y + HANGER_SPAN - T, HANGER_WIDTH / 2 - T]
];
module fix_plate() {
difference() { // cut shape where the bike frame ends
minkowski() {// combine fixation plate with edged corner
linear_extrude( height = FIX_PLATE_HEIGHT - FIX_PLATE_EDGE)
polygon(
polyRound(
fix_plate_shape, fn
));
linear_extrude(height = FIX_PLATE_EDGE, scale=0)
circle(r = FIX_PLATE_EDGE);
}
// shape where the bike frame ends
crop_y = FIX_PLATE_SPAN_Y + HANGER_THREAD_OFFSET + T;
// if hanger is milled, the baseplate ends where the frame ends
// else it encapsulates the hub screw
if ( TYPE == "MILLING" ) {
crop_y = FIX_PLATE_SPAN_Y + T;
}
translate([ 0
, crop_y
, -1
])cube(50, 50, 100);
}
}
module hangerblock() {
difference() {
union() { // combine base block with safety cylinder
// hanger
linear_extrude( height = HANGER_HEIGHT)
polygon(
polyRound(
hanger_shape, fn
));
// safety diameter probabaly unnecessary
if (HANGER_THREAD_DIAMETER + HANGER_SAFETY_WIDTH > HANGER_WIDTH) {
translate([
HANGER_WIDTH / 2
, FIX_PLATE_SPAN_Y + HANGER_THREAD_OFFSET
, 0])cylinder(
h = HANGER_HEIGHT
, d = HANGER_THREAD_DIAMETER + HANGER_SAFETY_WIDTH
, center = false
, $fn = fn
);
}
}
// cut out dropout frame corner
translate([
FRAME_OUTER_RADIUS_NEAR_HANGER - T * 3 /*better safe than sorry*/
, FIX_PLATE_SPAN_Y - FRAME_OUTER_RADIUS_NEAR_HANGER
, FIX_PLATE_HEIGHT - FIX_PLATE_EDGE
])cylinder(
h = HANGER_HEIGHT - FIX_PLATE_HEIGHT + FIX_PLATE_EDGE + 1
, d = HANGER_THREAD_DIAMETER*2 +T
, center = false
, $fn = fn*2
);
}
}
difference() {
union() { // combine fixation plate with hangerblock
fix_plate();
hangerblock();
}
// make some space for the Tensioner
if ( TYPE == "PRINTING" ){
translate([
- HANGER_SAFETY_WIDTH /2 - T
, FIX_PLATE_SPAN_Y + HANGER_HEIGHT - 12
, -1
])cube([
50
, 40
, FIX_PLATE_HEIGHT / 2
]);
}
}
}