// -*- C -*-
+include <funcs.scad>
+
coarse = false;
main_dia = 71.2 + 0.50 - 2.26;
sm_closure_cnr = 3.0;
-catch_stem_h = 3;
-catch_stem_len = 50;
-catch_stem_th = 3;
+catch_stalk_h = 5.0;
+catch_stalk_len = 50;
+catch_tip_th = 5;
+catch_head_th = 3;
+
+catch_pin_slop = 0.25; // each side, and above
+catch_pin_slop_x_extra = -0.55; // only on one side
+catch_stalk_above_gap = 1.5;
+catch_stalk_eff_bend_rad = catch_stalk_len * 0.75;
+
+catch_strap_width = 12;
+catch_stalk_base_width = catch_stalk_h;
catch_knob_dia = 6;
-catch_knob_above_gap = 8;
-catch_pin_height = 7;
+catch_knob_above_gap = 5;
+catch_knob_height = 3.0;
-catch_stem_below_gap = 1.0;
-catch_stem_beside_gap = 2.0;
-catch_pin_gap = 0.5;
-catch_hook_slope = 0.15;
+catch_stalk_below_gap = 1.0;
+catch_stalk_beside_gap = 2.0;
// calculated
smc_cnr_c_x = sm_bolt_shaft/2 - sm_closure_cnr
+ sm_bolt_head_thick/2 + smc_bolt_nut_eff_thick/2;
-catch_cr = catch_knob_dia/2 + catch_stem_beside_gap;
-catch_strap_width = sm_main_width;
+catch_cr = catch_knob_dia/2 + catch_stalk_beside_gap;
catch_strap_thick = sm_main_thick;
-catch_stem_end_h = catch_stem_h;
-catch_pin_width = (rivet_entry_width * sm_inner_rad / bayo_nom_rad)
- - catch_pin_gap;
echo("R ", sm_inner_rad, bayo_real_rad, bayo_nom_rad);
-cppy6 = -catch_strap_width/2;
-cppxC = 0.34 * sm_inner_rad * TAU;
-cppB = [ catch_pin_width/2,
- cppy6
- + catch_stem_below_gap
- + catch_pin_height
- + catch_knob_dia/2 ];
-cpp0 = [ 0,
- cppB[1]
- + catch_knob_dia
- + catch_knob_above_gap ];
-cpp12 = cpp0 + [1,0] * (catch_pin_height * catch_hook_slope);
-cpp1 = cpp0 + [0,1] * catch_pin_height;
-cpp2 = cpp1 + [1,0] * catch_pin_width;
-cpp4 = cpp0 + [0,-1] * catch_stem_end_h;
-cpp3 = [ cpp2[0], cpp4[1] ];
-cpp5 = [ cpp0[0] - catch_stem_len,
- -catch_stem_h ];
-cpp6 = [ cpp5[0], catch_cr ];
-cpp7 = cppB + [1,-1] * catch_knob_dia/2
- + [ catch_stem_beside_gap, -catch_stem_below_gap ]
- + [ 0, -catch_pin_height ]
- + [-1,1] * catch_cr;
-cpp11 = cpp7 + [1,0] * catch_cr;
-cpp10 = [ cpp11[0], 0 - catch_cr ];
-cpp8 = cpp10 + [1,0] * catch_cr;
-cpp9 = cpp8 + [0,1] * catch_cr;
-cppC = [ cppxC, cpp9[1] ];
-cppA = [ -cppxC, 0 ];
-cppD = cppC + [0,-1] * catch_strap_width;
-cppE = [ cppA[0], cppD[1] ];
-
$fs= coarse ? 2.5 : 0.5;
$fa= coarse ? 5 : 1;
echo(bayo_polygon);
+// CATCH
+
+cppxC = 0.41 * sm_inner_rad * TAU;
+
+// catch pin
+
+cpp_adj = (bayo_n[0] - bayo_f[0]) * (1 - sm_inner_rad / bayo_nom_rad);
+// radius scaling due to nom and actual radius difference in
+// bayo entry construction
+
+cppa = bayo_f + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
+cppb = bayo_g + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
+cppd = [ bayo_n[0]
+ - catch_pin_slop - catch_pin_slop_x_extra,
+ -catch_stalk_above_gap ];
+cppi = [ cppa[0], cppd[1] ];
+cppc = [ cppd[0], cppb[1] ];
+cpph = cppd + [0,-1] * catch_stalk_h;
+cppe = cppd + [0,-1] * (catch_knob_above_gap + catch_knob_dia/2);
+cppf = [ cppa[0], cppe[1] ];
+cppg = [ cppa[0], cpph[1] ];
+cppB = 0.5 * (cppf + cppe);
+
+echo("RR", sm_inner_rad / bayo_nom_rad);
+
+// catch assembly depression below pin
+
+cppy6 = cppB[1] - (catch_knob_dia/2
+ + (cppc[1] - cppd[1])
+ + catch_stalk_below_gap);
+cpp7 = [ cppB[0], cppy6 + catch_cr ];
+cpp11 = cpp7 + [1,0] * catch_cr;
+cppy9 = cppy6 + catch_strap_width * 1/3;
+cpp9 = [ cpp7[0] + catch_cr * 2, cppy9 ];
+cpp8 = cpp9 + [0,-1] * catch_cr;
+cpp10 = cpp8 + [-1,0] * catch_cr;
+cppC = [ cppxC, cpp9[1] ];
+cppD = cppC + [0,-1] * catch_strap_width;
+
+// catch assembly stalk and so on
+
+catch_cr3 = catch_cr + catch_stalk_h;
+
+cppF = [ cppg[0] - catch_stalk_eff_bend_rad, cppd[1] ];
+cpp4 = [ cppg[0] - catch_stalk_len, cpph[1] ] + [1,-1] * catch_cr;
+cpp5 = [ cpp4[0], cppC[1] + catch_cr ];
+cpp2 = cpp5 + [-1,0] * (catch_cr * 2 + catch_stalk_base_width);
+cpp2r = cpp2 + [1,0] * catch_cr;
+cpp2d = cpp2 + [0,-1] * catch_cr;
+cpp3 = [ cpp2[0] + catch_cr + catch_cr3, cppd[1] - catch_cr3 ];
+cppA = [ -cppxC, cpp9[1] ];
+cppE = [ cppA[0], cppD[1] ];
+
+catch_assembly_dy = -cppy9 + catch_strap_width;
+
+
module MainProfile(){
main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr;
difference(){
ImplHeadCup();
}
-module SomeStrap(){
+module SomeStrap(width){
// children(0) is to add, (1) subtract
difference(){
union(){
- cylinder(r=sm_outer_rad, h=sm_main_width);
+ cylinder(r=sm_outer_rad, h=width);
StrapMountProtrusion(smc_cnr_c_x + sm_closure_cnr,
smc_max_y,
- sm_closure_cnr);
+ sm_closure_cnr,
+ width);
children(0);
}
translate([0,0,-1])
- cylinder(r=sm_inner_rad, h=sm_main_width+2);
+ cylinder(r=sm_inner_rad, h=width+2);
translate(smc_pos)
- StrapMountBolt(10);
+ StrapMountBolt(10, width);
translate(smc_pos)
cube([ sm_bolt_tighten_allow, 40,100 ], center=true);
children(1);
}
}
-module StrapMountBolt(l_delta){ ///toplevel
+module StrapMountBolt(l_delta, strap_width){ ///toplevel
// positioned relative to smc_pos
translate([(smc_bolt_nut_eff_thick - sm_bolt_head_thick)/2,
smc_bolt_y,
- sm_main_width/2]){
+ strap_width/2]){
translate([ -sm_bolt_shaft/2-1, 0,0 ]){
rotate([0,90,0]) cylinder(r= sm_bolt_dia/2, h= sm_bolt_shaft+2);
}
}
}
-module StrapMountProtrusion(half_x, max_y, cnr){
+module StrapMountProtrusion(half_x, max_y, cnr, width){
translate(smc_pos){
- linear_extrude(height=sm_main_width, convexity=10){
+ linear_extrude(height=width, convexity=10){
hull(){
for (m = [0,1]) mirror([m,0,0]) {
translate([-(half_x - cnr), max_y - cnr])
}
module StrapMount(){ ////toplevel
- SomeStrap(){
+ SomeStrap(sm_main_width){
rotate([0,0,180]){
StrapMountProtrusion(strap_hoop_inside/2 + strap_hoop_thick,
strap_hoop_thick,
}
}
-module CatchCoreProfile(){ ////toplevel
- hull(){
- translate(cppB) circle(r= catch_knob_dia/2);
- polygon([cpp4,
- cppB,
- cpp3]);
- }
- translate(cpp8)
- circle(catch_cr);
- polygon([
- cpp4,
- cppB,
- cpp3,
- cpp2,
- cpp1,
- cpp12,
- ]);
+module CatchAssemblyCoreProfile(){
difference(){
- polygon([ cpp4,
- cpp3,
- cpp12,
- cppA,
- cppE,
- cppD,
- cppC,
- cpp9,
- cpp10,
- cpp11,
- cpp7,
- cpp5,
- ], convexity=10);
+ union(){
+ hull(){
+ translate(cpp3) circle(r= catch_cr3);
+ polygon([ cpp3,
+ cpp2r,
+ cpp5,
+ cpph,
+ cppd
+ ]);
+ }
+ polygon([cppD,
+ cppC,
+ cpp9,
+ cpp10,
+ cpp11,
+ cpp4,
+ cpp2r,
+ cpp2d,
+ cppA,
+ cppE
+ ]);
+ translate(cpp8) circle(r= catch_cr);
+ }
hull(){
+ translate(cpp4) circle(r= catch_cr);
+ translate(cpp5) circle(r= catch_cr);
translate(cpp7) circle(r= catch_cr);
- polygon([ cpp7,
- cpp5,
- cpp11 ]);
+ polygon([cpp4,
+ cppg,
+ cpph,
+ cpp10,
+ cpp11,
+ ]);
}
- hull(){
- translate(cpp6) circle(catch_cr);
- polygon([ cppA,
- cpp0,
- cpp1 ]);
+ translate(cpp2) circle(r= catch_cr);
+ }
+ // if cpp11 is above cpp10, the subtracted hull above
+ // can go down too far. Ensure we do not cut off below cppy6.
+ polygon([ cppE,
+ cppD,
+ cpp9,
+ [ cpp9[0], cppy6 ],
+ [ cpp7[0] - catch_cr, cppy6 ],
+ cpp2d
+ ]);
+}
+
+module CatchTipProfile(dy){
+ ddy = [0,dy];
+ intersection(){
+ translate(cppF){
+ difference(){
+ circle(r = dist2d(cppF, cppd));
+ //circle(r = dist2d(cppF, cppa));
+ }
}
+ polygon([ cppa,
+ cppi + ddy,
+ cppd + ddy,
+ cppc,
+ cppb ]);
+ }
+}
+
+module CatchHeadProfile(){
+ polygon([ cppd,
+ cppd,
+ cppi,
+ cppf,
+ cppe,
+ cpph ]);
+}
+
+
+module CatchCore(){ /////toplevel
+ linear_extrude(height=catch_strap_thick, convexity=10)
+ CatchAssemblyCoreProfile();
+
+ hull(){
+ linear_extrude(height=catch_head_th, convexity=10)
+ CatchTipProfile(0);
+ linear_extrude(height=catch_tip_th, convexity=10)
+ CatchTipProfile(catch_tip_th - catch_head_th);
+ }
+
+ linear_extrude(height=catch_head_th, convexity=10)
+ CatchHeadProfile();
+
+ translate(concat(cppB,[0])) hull(){
+ translate([0,0, catch_knob_height + catch_head_th - catch_knob_dia/2])
+ sphere(r = catch_knob_dia/2);
+ cylinder(r = catch_knob_dia/2, h = 0.1);
}
}
module CatchPreDistort(){ /////toplevel
scale(100 / sm_inner_rad)
rotate([90,0,0])
- linear_extrude(height=catch_strap_thick, convexity=10)
- CatchCoreProfile();
+ CatchCore();
}
module CatchAssembly(){ /////toplevel
- rotate([0,0, -0.5 * (cpp1[0] + cpp2[0]) / sm_inner_rad * 360/TAU])
- translate([0,0, catch_strap_width])
+ rotate([0,0, -(cppe[0] + cppB[0] + catch_pin_slop) / sm_inner_rad * 360/TAU])
+ translate([0,0, catch_assembly_dy])
scale(sm_inner_rad / 100)
import(str("poster-tube-lid,CatchPostDistort-fa",
(coarse ? 20 : 3),
".stl"),
convexity=20);
- SomeStrap(){
+ SomeStrap(catch_strap_width){
union(){ }
union(){
translate([-200, -200, -200])
module CatchDemo(){ /////toplevel
color("blue") translate([0,0,
- -catch_strap_width
- -cpp0[1]
+ -catch_assembly_dy
])
CatchAssembly();
translate([0,0,+side_height
module CatchDemoS(){ /////toplevel
color("blue") translate([0,0,
- -catch_strap_width
- -cpp0[1]
+ -catch_assembly_dy
])
CatchAssembly();
intersection(){
echo("G ",
cpp2[0] - cpp1[0],
bayo_n[0] - bayo_e[0]);
- color("blue") translate([-cpp2[0],
- -cpp2[1],
+ color("blue") translate([0,0,
+1,
- ])
- CatchCoreProfile();
+ ]) {
+ CatchAssemblyCoreProfile();
+ CatchHeadProfile();
+ }
polygon(bayo_polygon, convexity=10);
}
~ianmdlvl / reprap-play.git / blobdiff