catch_stem_len = 50;
catch_stem_th = 3;
+catch_pin_slop = 0.25; // each side, and above
+catch_stalk_above_gap = 1.5;
+catch_stalk_eff_bend_rad = catch_stem_len * 0.75;
+
+catch_stalk_base_width = 15;
+
catch_knob_dia = 6;
catch_knob_above_gap = 8;
-catch_pin_height = 7;
+catch_knob_height = 6;
catch_stem_below_gap = 1.0;
catch_stem_beside_gap = 2.0;
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 - catch_pin_gap;
+catch_pin_width = (rivet_entry_width * sm_inner_rad / bayo_nom_rad)
+ - catch_pin_gap;
-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] ];
+echo("R ", sm_inner_rad, bayo_real_rad, bayo_nom_rad);
$fs= coarse ? 2.5 : 0.5;
$fa= coarse ? 5 : 1;
echo(bayo_polygon);
+// CATCH
+
+//cppy6 = -catch_strap_width * 2/3;
+
+cppxC = 0.34 * 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 ];
+cppc = [ cppd[0], cppb[1] ];
+cpph = cppd + [0,-1] * catch_stem_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);
+
+// catch assembly depression below pin
+
+cppy6 = cppB[1] - (catch_knob_dia/2
+ + (cppc[1] - cppd[1])
+ + catch_stem_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
+
+cppF = [ cppg[0] - catch_stem_stalk_eff_bend_rad, cppd[1] ];
+cpp4 = [ cppg[0] - catch_stem_lenm, cppd[1] ] + [1,-1] * catch_cr;
+cpp5 = [ cpp4[0], cppC[1] + catch_cr ];
+cpp2 = cpp5 + [-1,0] * (catch_cr * 2 + catch_stalk_base_width);
+cpp3 = [ cpp2[0] + catch_cr * 2, cppd[1] - catch_cr ];
+cppA = [ -cppxC, cpp9[1] ];
+cppE = [ cppA[0], cppD[1] ];
+
+
module MainProfile(){
main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr;
difference(){
}
}
+module CatchCore(){ /////toplevel
+ linear_extrude(height=catch_strap_thick, convexity=10)
+ CatchCoreProfile();
+
+ translate(concat(cppB,[0])) hull(){
+ translate([0,0, catch_knob_height - 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
translate([0,0, catch_strap_width])
scale(sm_inner_rad / 100)
import(str("poster-tube-lid,CatchPostDistort-fa",
- (coarse ? 20 : 1),
+ (coarse ? 20 : 3),
".stl"),
convexity=20);
Cover();
}
+module CatchDemoS(){ /////toplevel
+ color("blue") translate([0,0,
+ -catch_strap_width
+ -cpp0[1]
+ ])
+ CatchAssembly();
+ intersection(){
+ translate([0,0,+side_height
+ ])
+ Cover();
+ mirror([0,1,0]) translate([-250,33,0]) cube([500,500,500]);
+ }
+ color("black")
+ translate([0,-33,0])
+ cube([6.15, 2,2], center=true);
+}
+
+module CatchPinProfileDemo(){ /////toplevel
+ echo("G ",
+ cpp2[0] - cpp1[0],
+ bayo_n[0] - bayo_e[0]);
+ color("blue") translate([-cpp2[0],
+ -cpp2[1],
+ +1,
+ ])
+ CatchCoreProfile();
+ polygon(bayo_polygon, convexity=10);
+}
+
//ProfilesDemo();
//BayonetCutout();
//MainProfile();