poster-tube-lid: catch: rework means assembly part is bigger

[reprap-play.git] / poster-tube-lid.scad

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index cc4d297a2a9a532f95edd9e550c63d55b6013df7..b2718f22d71692678656d1f286b23d72415d482e 100644 (file)
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -79,9 +79,15 @@ catch_stem_h = 3;
 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;
@@ -150,38 +156,6 @@ catch_pin_width = (rivet_entry_width * sm_inner_rad / bayo_nom_rad)
 
 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;
 
@@ -225,6 +199,51 @@ bayo_polygon = [ bayo_a,
 
 echo(bayo_polygon);
 
+// CATCH
+
+//cppy6 = -catch_strap_width * 2/3;
+
+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 ];
+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_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 * 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(){
@@ -532,6 +551,45 @@ module StrapMount(){ ////toplevel
   }
 }
 
+module CatchAssemblyCoreProfile(){
+  difference(){
+    union(){
+      hull(){
+       translate(cpp3) circle(r= catch_cr);
+       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([cpp4,
+              cppg,
+              cpph,
+              cpp10,
+              cpp11,
+              ]);
+    }
+  }
+}
+
 module CatchCoreProfile(){ ////toplevel
   hull(){
     translate(cppB) circle(r= catch_knob_dia/2);
@@ -580,7 +638,13 @@ module CatchCoreProfile(){ ////toplevel
 
 module CatchCore(){ /////toplevel
   linear_extrude(height=catch_strap_thick, convexity=10)
-    CatchCoreProfile();
+    CatchAssemblyCoreProfile();
+
+  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