// -*- 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 = 3;
+catch_stalk_len = 50;
+catch_head_th = 3;
catch_pin_slop = 0.25; // each side, and above
+catch_pin_slop_x_extra = 0.0; // only on one side
catch_stalk_above_gap = 1.5;
-catch_stalk_eff_bend_rad = catch_stem_len * 0.75;
+catch_stalk_eff_bend_rad = catch_stalk_len * 0.75;
catch_stalk_base_width = 15;
catch_knob_above_gap = 8;
catch_knob_height = 6;
-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_cr = catch_knob_dia/2 + catch_stalk_beside_gap;
catch_strap_width = sm_main_width;
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 * 2/3;
-cppxC = 0.34 * sm_inner_rad * TAU;
+cppxC = 0.41 * sm_inner_rad * TAU;
// catch pin
-cppa = bayo_f + [1,-1] * catch_pin_slop;
-cppb = bayo_g + [1,-1] * catch_pin_slop;
-cppd = [ bayo_n[0] - catch_pin_slop, -catch_stalk_above_gap ];
+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 ];
cppc = [ cppd[0], cppb[1] ];
-cpph = cppd + [0,-1] * catch_stem_h;
+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_stem_below_gap);
+ + catch_stalk_below_gap);
cpp7 = [ cppB[0], cppy6 + catch_cr ];
cpp11 = cpp7 + [1,0] * catch_cr;
cppy9 = cppy6 + catch_strap_width * 1/3;
// catch assembly stalk and so on
-cppF = [ cppg[0] - catch_stem_stalk_eff_bend_rad, cppd[1] ];
-cpp4 = [ cppg[0] - catch_stem_len, cpph[1] ] + [1,-1] * catch_cr;
+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;
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;
cpp11,
]);
}
+ translate(cpp2) circle(r= catch_cr);
}
}
-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,
- ]);
- difference(){
- polygon([ cpp4,
- cpp3,
- cpp12,
- cppA,
- cppE,
- cppD,
- cppC,
- cpp9,
- cpp10,
- cpp11,
- cpp7,
- cpp5,
- ], convexity=10);
- hull(){
- translate(cpp7) circle(r= catch_cr);
- polygon([ cpp7,
- cpp5,
- cpp11 ]);
- }
- hull(){
- translate(cpp6) circle(catch_cr);
- polygon([ cppA,
- cpp0,
- cpp1 ]);
+module CatchHeadProfile(){
+ intersection(){
+ translate(cppF){
+ difference(){
+ circle(r = dist2d(cppF, cppd));
+ //circle(r = dist2d(cppF, cppa));
+ }
}
+ polygon([ cppa,
+ cppg,
+ cpph,
+ cppd,
+ cppc,
+ cppb ]);
}
+ polygon([ cppd,
+ cppg,
+ cppf,
+ cppe,
+ cpph ]);
}
+
module CatchCore(){ /////toplevel
linear_extrude(height=catch_strap_thick, convexity=10)
CatchAssemblyCoreProfile();
+ linear_extrude(height=catch_head_th, convexity=10)
+ CatchHeadProfile();
+
translate(concat(cppB,[0])) hull(){
translate([0,0, catch_knob_height - catch_knob_dia/2])
sphere(r = catch_knob_dia/2);
}
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),
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);
}