X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=flyscreen-handle.scad;h=d2b1fd17e5b77f3b6392127072dea082da0e0b81;hp=5111eb36c1a4071cdc6ffed599e06622dad6df49;hb=f73a9b4fbb73132ca73c4722590440ecd2deb1c3;hpb=d41dba652cc5be9d5e36d64733f2743471ed4391

diff --git a/flyscreen-handle.scad b/flyscreen-handle.scad
index 5111eb3..d2b1fd1 100644
--- a/flyscreen-handle.scad
+++ b/flyscreen-handle.scad
@@ -2,123 +2,119 @@
 
 opening_height = 7.84;
 opening_depth = 7.88;
-openingcnr_dia = 2.75;
-opening_topprotr = 1.54;
+openingedge_dia = 1.34;
+opening_protrh = 1.8;
 
-gap = 0.25;
+pivot_x = 6;
+inside_len = 4;
 
-retain_empir_angle = 20;
-retain_empir_stalkw = 1.0;
-retain_rad = 1.5;
+pivoting_gap = 0.1;
 
-topprotr_rad = 0.35;
+outside_gap = 3;
+outside_len = 16;
+outend_height = 3;
 
-bot_overlap = 5;
-bot_w = 3;
+outside_pushh = 4;
+outside_pushslope = 1.4;
 
-handle_d = 2;
-handle_w = 8;
-handle_rh = 2;
-handle_rcut = 3;
+ourcirc_r = 0.5 / 2;
 
-cutout_gap = 1.5;
+opening_protr_slop = 0.1;
 
-// calculated
-
-ins_irad = openingcnr_dia/2 + gap;
-ins_orad = openingcnr_dia/2 + opening_height - gap;
-ins_th = ins_orad - ins_irad;
+intooth_top_slop = 0.1;
+inside_h_xgap = 1;
 
-handle_x0 = ins_irad;
-handle_h = bot_overlap + ins_th;
-handle_y0 = -ins_orad-bot_overlap;
-handle_y1 = handle_y0 + handle_h;
+pivot_r = 2;
+pivot_slop = 0.25;
 
-handle_x1 = handle_x0 + bot_w + handle_w;
+// calculated
 
-module InsertSection(){
-  hull(){
-    translate([-ins_orad, 0]) square([ins_th, 0.1]);
-    translate([-ins_irad - topprotr_rad,
-	       opening_topprotr - topprotr_rad])
-      circle(r=topprotr_rad, $fn=10);
+inside_h = opening_height/2 - opening_protrh - inside_h_xgap/2;
+
+edge_or = openingedge_dia/2 + opening_protr_slop;
+
+Q0 = [ openingedge_dia/2,
+       openingedge_dia/2 + opening_height/2 ];
+
+p4p5d = [edge_or + ourcirc_r, 0];
+
+P0 = [ pivot_x, pivoting_gap ];
+P4 = Q0 - p4p5d;
+P3 = [ 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], P3[1] - (inside_h + ourcirc_r*2) ];
+P9 = [ outside_len - ourcirc_r, outside_gap/2 + ourcirc_r ];
+P8 = P9 + [ 0, outend_height - ourcirc_r*2 ];
+P5 = Q0 + p4p5d;
+P6 = P5 + [ 0, outside_pushh - ourcirc_r*2 ];
+P7 = [ P6[0] + (P6[1] - P1[1]) / outside_pushslope,
+       P1[1] ];
+
+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([0.1,0.1]) mirror([1,1]) square([100,100]);
+  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]) circle(r=retain_rad, $fn=20);
-}
-
-module RetainCutout(){
-  rotate(180-retain_empir_angle)
-    translate([0,ins_orad]) {
-    difference(){
-      circle(r=retain_rad + cutout_gap, $fn=20);
-      rotate(180 + retain_empir_angle/2)
-	translate([0, -retain_empir_stalkw])
-	square([100, retain_empir_stalkw*2]);
+module LeverSect(){
+  PsHull([P2,P3,P4]);
+  difference(){
+    PsHull([P0,P1,P2,P5,P8,P9]);
+    translate(Q0) {
+      hull(){
+	circle(r=edge_or, $fn=20);
+	translate([0,10]) circle(r=edge_or, $fn=20);
+      }
     }
   }
-}  
+}
 
-module WithRetainSection(){
+module LeverSectTop(){
   difference(){
-    InsertSection();
-    RetainCutout();
+    LeverSect();
+    translate([pivot_x,0]) circle(r= pivot_r + pivot_slop, $fn=20);
   }
-  HandleSection();
-  RetainSection();
 }
 
-module Demo(){
-  difference(){
-    InsertSection();
-    RetainCutout();
+module LeverSectBot(){
+  mirror([0,1]) {
+    LeverSect();
+    PsHull([P5,P6,P7]);
+    translate([pivot_x,0]) circle(r=pivot_r, $fn=20);
   }
-  HandleSection();
-  color("red") RetainSection();
 }
 
-module Test(){
-  linear_extrude(height=2) WithRetainSection();
+module Demo(){
+  translate([0,0,-5]) color("white") ExtrusionSect();
+  LeverSectTop();
+  LeverSectBot();
 }
 
-//Demo();
-//WithRetainSection();
-Test();
+Demo();