include <funcs.scad>
-tube_dia = 27.5 + 1.625;
+tube_dia = 27.5 + 1.625 + 1.32;
lock_w = 42.5 + 0.5;
lock_d = 28.0 + 0.5;
main_h = 45.0;
backflange_d = 12;
+backflange_hole_dy = -1;
lockshaft_dia = 14.35;
cliprecess_h = 16;
-total_h = 45;
+total_h = 75;
-back_gap = 14.5;
-main_th = 3.25;
-tube_th = 2.50;
+back_gap = 12.5;
+main_th = 4.50;
+tube_th = 5.50;
midweb_d = 3;
clip_th = 3.5;
mountscrew_dia = 4 + 0.5;
clipbolt_dia = 5 + 0.6;
+mountscrew_washer = 10;
+
backflange_th = 4.5;
$fn=50;
tube_rear_extra_th = 1;
-divide_shaft_w = 3;
-divide_shaft_l = 3;
-divide_head_dx = 3;
-divide_head_th = 3;
+divide_shaft_w = 1.75;
+divide_shaft_l = 1.5;
+divide_head_dx = 1.75;
+divide_head_th = 1.5;
divide_gap = 0.75;
-divide_heads = 2;
+
+divide_angle = 26;
+divide_fudge_r = 4.75;
+
+backflange_angle = 20;
// calculated
tube_or = tube_dia/2 + tube_th;
back_ohw = back_gap/2 + backflange_th;
-backflange_ymin = tube_or+backflange_d;
+backflange_ymin = tube_dia/2 + backflange_d;
lock_0y = tube_dia/2 + lock_d/2 + midweb_d;
lock_0x = lock_w/2 - lock_d/2;
}
}
-module DividePlan(){
- g = divide_gap;
- dx = divide_head_dx;
- for (m=[0,1]) mirror([m,0]) {
- translate([divide_shaft_w, 0]) square([10, g]);
- for (i=[0:divide_heads-1]) {
- translate([divide_shaft_w, i*(divide_shaft_l + divide_head_th)]) {
- translate([0, 0]) square([g, divide_shaft_l + g]);
- translate([0, divide_shaft_l]) square([divide_head_dx + g, g]);
- translate([dx, divide_shaft_l]) square([g, divide_head_th + g]);
- translate([0, divide_shaft_l + divide_head_th])
- square([divide_head_dx + g, g]);
- }
+module DivideHook(){ ////toplevel
+ w = tube_th/2;
+ d = divide_gap;
+
+ translate([-1,0] * (w + d + w)){
+ for (sx=[-1,+1])
+ translate([-(w + w+d) * sx, 0]) circle(r= w);
+ difference(){
+ circle(r = 3*w + d);
+ circle(r = w + d);
+ translate([-10*w, -10*w]) square([20*w, 10*w]);
}
- translate([-0.1, (divide_shaft_l + divide_head_th) * divide_heads])
- square([divide_shaft_w + g, g]);
}
}
-module MainPlan(){
+module DivideCut(){
+ w = tube_th/2;
+ d = divide_gap;
+ br = tube_dia/2 + tube_th;
+
difference(){
- union(){
- hull(){
- for (t=[0, tube_rear_extra_th])
- translate([0, -t])
- circle(r = tube_or);
- }
- translate([-back_ohw,0]) mirror([0,1])
- square([back_ohw*2, backflange_ymin]);
+ offset(r=divide_gap) DivideHook();
+ DivideHook();
+ translate([-2*w,0]) mirror([0,1]) square([4*w, 4*w]);
+ }
+}
- translate([0, lock_0y]){
- oval(lock_or);
+module DivideCutB(){
+ w = tube_th/2;
+ d = divide_gap;
+ br = tube_dia/2 + tube_th;
+
+ intersection(){
+ translate([br - tube_th/2,0]) {
+ difference(){
+ circle(r=br + d);
+ circle(r=br);
}
+ }
+ translate([-2*w, 0]) mirror([0,1]) square(4*w);
+ }
+}
- hull(){
- JoinCircs(0.01);
- polygon([[0,0], lock_0, [-lock_0[0], lock_0[1]]]);
- }
+module DivideSurround(){
+ w = tube_th/2;
+ d = divide_gap;
+
+ offset(r= w*2) {
+ hull() {
+ DivideCut();
+ translate([-(4*w + 2*d), 8*w]) circle(r=w);
}
+ }
+}
- circle(r = tube_dia/2);
- translate([-back_gap/2,1]) mirror([0,1])
- square([back_gap, backflange_ymin+2]);
+module DivideInPlace(){
+ rotate([0,0, -divide_angle])
+ translate([ -tube_dia/2 -tube_th/2, 0])
+ children();
+}
+
+module MainPlan(){ ////toplevel
+ difference(){
+ union(){
+ difference(){
+ union(){
+ hull(){
+ for (t=[0, tube_rear_extra_th])
+ translate([0, -t])
+ circle(r = tube_or);
+ }
+ rotate([0,0, backflange_angle])
+ translate([-back_ohw,0]) mirror([0,1])
+ square([back_ohw*2, backflange_ymin]);
+
+ translate([0, lock_0y]){
+ oval(lock_or);
+ }
+
+ hull(){
+ JoinCircs(0.01);
+ polygon([[0,0], lock_0, [-lock_0[0], lock_0[1]]]);
+ }
+ }
+
+ rotate([0,0, backflange_angle])
+ translate([-back_gap/2,1]) mirror([0,1])
+ square([back_gap, backflange_ymin+2]);
+
+ JoinCircs(join_cr);
+ }
+ DivideInPlace() DivideSurround();
+ }
translate([0, lock_0y]){
oval([lock_w/2, lock_d/2]);
}
- JoinCircs(join_cr);
+ circle(r = tube_dia/2);
+
+ DivideInPlace() DivideCut();
+ DivideInPlace() DivideCutB();
}
}
lockshaft_or = lockshaft_r + [clip_th,clip_th];
cliprecess_ymax = cliprecess_h - lockshaft_r[1];
-clip_ymin = cliprecess_ymax - total_h;
+clip_ymin = cliprecess_ymax - main_h;
clip_ogap = clip_gap + clip_th*2;
module ClipElevationPositive(){
children(0);
}
-module ThroughHole(r, y, z) {
- translate([-50, y, z])
+module ThroughHole(r, y, z, x=-50) {
+ translate([x, y, z])
rotate([0, 90, 0])
cylinder(r=r, h=100, $fn=20);
}
-module ThroughHoles(){
+module MountingHoleCylinders(r, x=-50){
for (z=[ 1/4, 3/4 ]) {
- ThroughHole( mountscrew_dia/2,
- -tube_or -0.5*backflange_d,
- total_h * z );
+ rotate([0,0, backflange_angle])
+ ThroughHole( r,
+ -tube_dia/2 -0.5*backflange_d + backflange_hole_dy,
+ total_h * z,
+ x);
}
+}
+
+module ThroughHoles(){
+ MountingHoleCylinders(mountscrew_dia/2);
ThroughHole( clipbolt_dia/2,
lock_0y + lock_d/2 + clip_d/2 + front_th/2,
- total_h - cliprecess_h - clip_th - clip_d/2 );
+ main_h - cliprecess_h - clip_th - clip_d/2 );
}
+module SlopeTrimElevation(){
+ far_corner_nom = [ lock_0y + lock_d/2, main_h ];
+ round_centre = far_corner_nom + lock_d/2 * [0,1];
+ hull(){
+ translate(round_centre) circle(r= lock_d/2);
+ translate([ lock_0y - lock_d/2, total_h ]) square([ lock_d + clip_d, 1 ]);
+ translate(far_corner_nom) square([clip_d*2, 1]);
+ }
+}
+
+module SlopeTrim(){
+ rotate([0,90,0])
+ rotate([0,0,90])
+ translate([0,0, -lock_w])
+ linear_extrude(convexity=100, height=lock_w*2)
+ SlopeTrimElevation();
+}
+
module MainPositive(){
difference(){
union(){
}
}
-module Bracket(){ //// toplevel
+module Bracket(){ ////toplevel
difference(){
MainPositive();
ThroughHoles();
+ SlopeTrim();
}
}
-module TestTopEdge(){ //// toplevel
+module TestTopEdge(){ ////toplevel
intersection(){
translate([0,0, -total_h])
translate([0,0, 4])
}
}
-module TestClipBoltHole(){ //// toplevel
+module TestClipBoltHole(){ ////toplevel
intersection(){
union(){
translate([0, 0, -5])
}
}
+module Demo(){ ////toplevel
+ Bracket();
+ color("blue") MountingHoleCylinders(mountscrew_dia/2 - 0.1);
+ color("black") MountingHoleCylinders(mountscrew_washer/2,
+ back_ohw + 0.25);
+}
+
+module DivideDemo(){ ////toplevel
+ color("black") translate([0,0,-2]) MainPlan();
+ color("grey") DivideInPlace() DivideHook();
+ color("blue") translate([0,0,-4]) DivideInPlace() DivideCut();
+}
+
//MainPlan();
//ClipElevationPositive();
//ClipElevation();
//TestTopEdge();
//TestClipBoltHole();
-Bracket();
+//Bracket();
+
~ianmdlvl / reprap-play.git / blobdiff