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=89b7de808502a4be94c44b9475f1da0e36116ebd;hb=4fe16ef67658b640a12f72ec23d6c2877a8ac5dc;hpb=c9802b9403c18cae16fc89b6d136890597c167a8

diff --git a/flyscreen-handle.scad b/flyscreen-handle.scad
index 89b7de8..5a535fc 100644
--- a/flyscreen-handle.scad
+++ b/flyscreen-handle.scad
@@ -1,178 +1,183 @@
 // -*- C -*-
 
-opening_height = 7.84 - 0.3;
-opening_depth = 6.0; // 7.88;
-openingcnr_dia = 2.75;
-opening_topprotr = 1.54;
+opening_height = 7.84;
+opening_depth = 7.88;
+openingedge_dia = 1.34;
+opening_protrh = 1.8;
 
-gap = 0.25;
+pivot_x = 6;
+inside_len = 4;
 
-retain_empir_angle = 20;
-retain_empir_stalkw = 0.8;
-retain_rad = 1.65;
-retain_empir_inward = 0.65;
+pivoting_gap = 0.1;
 
-hgap_empir_adjust = -0.5;
+outside_gap = 3;
+outside_len = 16;
+outend_height = 3;
 
-topprotr_rad = 0.35;
+outside_pushh = 4;
+outside_pushslope = 1.4;
+outside_push_inadj = 0.82;
 
-bot_overlap = 5;
-bot_w = 3;
+ourcirc_r = 0.5 / 2;
 
-handle_w = 8;
-handle_rh = 3;
-handle_rcut = 3;
+ribble_dia = 2.2;;
 
-cutout_gap = 1.5;
+opening_protr_slop = 0.1;
 
-total_len = 35;
-retaining_len = 10;
-overret_gaplen = 5;
+intooth_top_slop = 0.1;
+inside_h_xgap = 1;
 
-overret_hch = 5;
+pivot_r = 2;
+pivot_slop = 0.25;
+
+strap_above = 0.1;
+strap_th = 2.5;
+strap_below = 3;
+
+width = 5;
 
 // calculated
 
-ins_irad = openingcnr_dia/2 + gap;
-ins_orad = openingcnr_dia/2 + opening_height - gap;
-ins_th = ins_orad - ins_irad;
+inside_h = opening_height/2 - opening_protrh - inside_h_xgap/2;
 
-handle_x0 = ins_irad + hgap_empir_adjust;
-handle_h = bot_overlap + ins_th;
-handle_y0 = -ins_orad-bot_overlap;
-handle_y1 = handle_y0 + handle_h;
+edge_or = openingedge_dia/2 + opening_protr_slop;
 
-handle_x1 = handle_x0 + bot_w + handle_w;
+Q0 = [ openingedge_dia/2,
+       openingedge_dia/2 + opening_height/2 ];
 
-topprotr_y = -ins_irad + opening_topprotr;
+p4p5d = [edge_or + ourcirc_r, 0];
 
-module InsertSection(){
-  hull(){
-    translate([-ins_irad, -ins_irad])
-      mirror([1,0])
-      square([opening_depth - ins_irad, 0.1]);
-    translate([-ins_irad - topprotr_rad,
-	       topprotr_y - topprotr_rad])
-      circle(r=topprotr_rad, $fn=10);
+P0 = [ pivot_x, pivoting_gap ];
+P4 = Q0 - p4p5d;
+P3t = [ P4[0], Q0[1] - openingedge_dia/2 + opening_protrh
+	- intooth_top_slop - ourcirc_r ];
+P2 = P4 + [ -(inside_len - ourcirc_r*2), 0 ];
+P1 = [ P2[0], P3t[1] - (inside_h + ourcirc_r*2) ];
+
+P5 = Q0 + p4p5d;
+
+P8t = [ outside_len - ourcirc_r, P5[1] ];
+P9t = P8t + [ 0, -(strap_above + strap_th + strap_below - ourcirc_r*2) ];
+
+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,
+       P1[1] ];
+
+P3a = P3t + [ -outside_push_inadj, 0 ];
+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;
+
+  for (my=[0,1]) {
+    mirror([0,my]) {
+      translate(Q0) {
+	hull(){
+	  circle(r=cr, $fn=20);
+	  translate([-cr,10]) square([cr*2, 1]);
+	}
+      }
+    }
   }
-  translate([0, -ins_orad]) square([ins_irad+1, ins_th]);
-  intersection(){
-    translate([0.1, -ins_irad + 0.1])
-      mirror([1,1])
-      square([100, opening_depth]);
+  translate([-opening_depth, -toph]) {
     difference(){
-      circle(r= ins_orad);
-      circle(r= ins_irad, $fn=20);
+      translate([-5,-5])
+	square([opening_depth+6, toph*2+10]);
+      square([opening_depth+2, toph*2]);
     }
   }
 }
 
-module HandleSection(){
-  difference(){
-    hull(){
-      translate([handle_x0, handle_y0])
-	square([bot_w, handle_h]);
-      for (y= [handle_y1 - handle_rh/2,
-	       handle_y1 - ins_th + handle_rh/2]) {
-	translate([handle_x1 - handle_rh/2, y])
-	  circle(r= handle_rh/2, $fn=20);
-      }
-    }
-    hull(){
-      for (x= [handle_x0 + bot_w + handle_rcut/2,
-	       handle_x1 - handle_rh/2 - handle_rcut/2]) {
-	translate([x, handle_y1])
-	  circle(r = handle_rcut/2, $fn=20);
-      }
-    }
-  }
+module PsHull(ps) {
   hull(){
-    for (y= [handle_y1 -   handle_rh/2,
-	     handle_y1 - 3*handle_rh/2])
-      translate([handle_x1 - handle_rh/2, y])
-	circle(r = handle_rh/2, $fn=20);
+    for (p = ps) {
+      translate(p)
+	circle(r = ourcirc_r, $fn=10);
+    }
   }
 }
 
-module RetainSection(){
-  rotate(180-retain_empir_angle)
-    translate([0, ins_orad - retain_empir_inward])
-    circle(r=retain_rad, $fn=20);
+module LeverSect(top, inadj=false){
+  P3 = inadj ? P3a : P3t;
+  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]);
+    translate(Q0) {
+      rotate(diag){
+	hull(){
+	  circle(r=edge_or, $fn=20);
+	  translate([0,10]) circle(r=edge_or, $fn=20);
+	}
+      }
+    }
+  }
 }
 
-module RetainCutout(gapping=false){
-  rotate(180-retain_empir_angle)
-    translate([0, ins_orad - retain_empir_inward]) {
+module StrapSect(){
+  translate(P9t) {
     difference(){
-      circle(r=retain_rad + cutout_gap, $fn=20);
-      if (!gapping)
-	rotate(180 + retain_empir_angle/2)
-	  translate([0, -retain_empir_stalkw])
-	  square([100, retain_empir_stalkw*2]);
+      circle(r = strap_below + strap_th, $fn=40);
+      circle(r = strap_below,            $fn=40);
     }
   }
-}  
+}
 
-module GappingSection(){
+module LeverSectTop(){
   difference(){
-    InsertSection();
-    RetainCutout(true);
+    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);
   }
-  HandleSection();
 }
 
-module WithRetainSection(){
-  difference(){
-    InsertSection();
-    RetainCutout();
+module LeverSectBot(inadj=false){
+  P6 = inadj ? P6a : P6t;
+  mirror([0,1]) {
+    LeverSect(false, inadj);
+    PsHull([P5,P6,P7]);
+    translate([pivot_x,0]) circle(r=pivot_r, $fn=20);
   }
-  HandleSection();
-  RetainSection();
 }
 
-module BasicSection(){
-  InsertSection();
-  HandleSection();
+module Demo(){
+  translate([0,0,-5]) color("white") ExtrusionSect();
+  LeverSectTop();
+  translate([0,0,5]) LeverSectBot();
+  color("black") LeverSectBot(true);
+  color("blue") translate([0,0,10]) StrapSect();
 }
 
-module Handle(){
-  bs0 = retaining_len + overret_gaplen;
-  bs1 = bs0 + overret_hch;
-  linear_extrude(height=total_len, convexity=100) GappingSection();
-  linear_extrude(height=retaining_len, convexity=100) WithRetainSection();
-  translate([0,0, bs1]) linear_extrude(height= total_len - bs1)
-    BasicSection();
-  translate([0,0, bs1+0.1]) mirror([0,0,1]) {
-    intersection_for (sl=[0,1]) {
-      multmatrix([[1,0,0,0],
-		  [0,1,sl*0.65,0],
-		  [0,0,1,0],
-		  [0,0,0,1]])
-	linear_extrude(height= overret_gaplen+1, convexity=100)
-	BasicSection();
-    }
-  }
+module LeverTop(){
+  linear_extrude(height=width, convexity=100) LeverSectTop();
 }
 
-module Demo(){
-  color("red") translate([0,0,-3]) BasicSection();
-  color("blue") translate([0,0,3]) WithRetainSection();
+module LeverBot(inadj=false){
+  linear_extrude(height=width, convexity=100) LeverSectBot(inadj);
 }
 
 module Test(){
-  linear_extrude(height=2) {
-    WithRetainSection();
-    translate([0, -handle_y0 + topprotr_y + 10])
-      BasicSection();
-  }
+  translate([0,2,0]) LeverTop();
+  LeverBot();
+  translate([0,-opening_height - 2,0]) LeverBot(true);
 }
 
-//Demo();
-//HandleSection();
-//InsertSection();
-//WithRetainSection();
-//BasicSection();
-//GappingSection();
-//Test();
 Demo();
-//Handle();
+//Test();