X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=flyscreen-handle.scad;h=5a535fcd218a5fd0880eb23ef08a1b9c2b5d30bb;hp=bdecb614fed04226b41f2ebd503e434406f1acaf;hb=4fe16ef67658b640a12f72ec23d6c2877a8ac5dc;hpb=dcc54a896784314a4376338b2331b33a86584684

diff --git a/flyscreen-handle.scad b/flyscreen-handle.scad
index bdecb61..5a535fc 100644
--- a/flyscreen-handle.scad
+++ b/flyscreen-handle.scad
@@ -20,6 +20,8 @@ outside_push_inadj = 0.82;
 
 ourcirc_r = 0.5 / 2;
 
+ribble_dia = 2.2;;
+
 opening_protr_slop = 0.1;
 
 intooth_top_slop = 0.1;
@@ -28,6 +30,10 @@ inside_h_xgap = 1;
 pivot_r = 2;
 pivot_slop = 0.25;
 
+strap_above = 0.1;
+strap_th = 2.5;
+strap_below = 3;
+
 width = 5;
 
 // calculated
@@ -50,10 +56,11 @@ P1 = [ P2[0], P3t[1] - (inside_h + ourcirc_r*2) ];
 
 P5 = Q0 + p4p5d;
 
-P9mid = [ outside_len - ourcirc_r, outside_gap/2 + ourcirc_r ];
-P8mid = P9mid + [ 0, outend_height - ourcirc_r*2 ];
+P8t = [ outside_len - ourcirc_r, P5[1] ];
+P9t = P8t + [ 0, -(strap_above + strap_th + strap_below - ourcirc_r*2) ];
 
-P89adj = [ 0, P5[1] - P8mid[1] ];
+P9b = [ P9t[0], -P9t[1] + outside_gap ];
+P8b = P9b + [ 0, outend_height ];
 
 P6t = P5 + [ 0, outside_pushh - ourcirc_r*2 ];
 P7 = [ P6t[0] + (P6t[1] - P1[1]) / outside_pushslope,
@@ -64,6 +71,8 @@ P6a = P6t + [ -outside_push_inadj, 0 ];
 
 outside_push_inadj_slope = (P3t[1]-P4[1]) / (P6a[1]-P5[1]);
 
+ribble_rad = ribble_dia/2;
+
 module ExtrusionSect(){
   cr = openingedge_dia/2;
   toph = opening_height/2 + opening_protrh;
@@ -96,11 +105,11 @@ module PsHull(ps) {
   }
 }
 
-module LeverSect(P89adjsense, inadj=false){
+module LeverSect(top, inadj=false){
   P3 = inadj ? P3a : P3t;
-  P8 = P8mid + P89adjsense * P89adj;
-  P9 = P9mid + P89adjsense * P89adj;
-  diag = inadj ? 0 : atan(outside_push_inadj_slope);
+  P8 = top ? P8t : P8b;
+  P9 = top ? P9t : P9b;
+  diag = inadj ? atan(outside_push_inadj_slope) : 0;
   PsHull([P2,P3,P4]);
   difference(){
     PsHull([P0,P1,P2,P5,P8,P9]);
@@ -115,9 +124,26 @@ module LeverSect(P89adjsense, inadj=false){
   }
 }
 
+module StrapSect(){
+  translate(P9t) {
+    difference(){
+      circle(r = strap_below + strap_th, $fn=40);
+      circle(r = strap_below,            $fn=40);
+    }
+  }
+}
+
 module LeverSectTop(){
   difference(){
-    LeverSect(+1, false);
+    union(){
+      LeverSect(true, false);
+      for (x = [ P8t[0] + ourcirc_r - ribble_rad :
+		 -ribble_rad * 4 :
+		 Q0[0] + edge_or + ribble_rad*2 ]) {
+	translate([x, P5[1] + ourcirc_r])
+	  circle(r = ribble_rad, $fn=20);
+      }
+    }
     translate([pivot_x,0]) circle(r= pivot_r + pivot_slop, $fn=20);
   }
 }
@@ -125,7 +151,7 @@ module LeverSectTop(){
 module LeverSectBot(inadj=false){
   P6 = inadj ? P6a : P6t;
   mirror([0,1]) {
-    LeverSect(-1, inadj);
+    LeverSect(false, inadj);
     PsHull([P5,P6,P7]);
     translate([pivot_x,0]) circle(r=pivot_r, $fn=20);
   }
@@ -134,7 +160,9 @@ module LeverSectBot(inadj=false){
 module Demo(){
   translate([0,0,-5]) color("white") ExtrusionSect();
   LeverSectTop();
-  LeverSectBot();
+  translate([0,0,5]) LeverSectBot();
+  color("black") LeverSectBot(true);
+  color("blue") translate([0,0,10]) StrapSect();
 }
 
 module LeverTop(){
@@ -151,5 +179,5 @@ module Test(){
   translate([0,-opening_height - 2,0]) LeverBot(true);
 }
 
-//Demo();
-Test();
+Demo();
+//Test();