X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=flyscreen-handle.scad;h=60622789b5753ccbca74fecaa1a263902acb66ff;hp=85434c599e8f15d25297c523f8ac5ee01d3159c3;hb=4515eb62a740a1c33403e30bb80be04912140734;hpb=e41c2f5f9329706dceafdfa562eae9949e5ad6b8

diff --git a/flyscreen-handle.scad b/flyscreen-handle.scad
index 85434c5..6062278 100644
--- a/flyscreen-handle.scad
+++ b/flyscreen-handle.scad
@@ -14,26 +14,34 @@ retain_hgap_adjust = 1.5;
 retain_stalk_len = 8.0;
 retain_stalk_h = 1.5;
 retain_bend_gap = 2.0;
-retain_empir_angle = -25;
+retain_empir_angle = -10;
+retain_pushmore_adj = 0.0;
 
 hgap_empir_adjust = -0.5 -2.50;
 
 topprotr_rad = 0.35;
 
-bot_overlap = 5;
+bot_overlap = 4;
 bot_w = 3;
 
-handle_w = 8;
+handle_w = 10;
 handle_rh = 3;
 handle_rcut = 3;
 
 cutout_gap = 1.5;
 
-total_len = 35;
-retaining_len = 10;
+total_len = 40;
+retain_len = 8;
+basics_len = 8;
 
 overret_hch = 5;
 
+peg_width_slop = 0.5;
+peg_inner_thick = 1.0;
+
+peg_wedge_less = 1.0;
+peg_wedge_more = 1.0;
+
 // calculated
 
 ins_irad = openingcnr_dia/2 + gap;
@@ -56,6 +64,18 @@ retain_cutout_h = retain_rad * 2 + retain_bend_gap;
 
 overret_gaplen = retain_cutout_h / cos(retain_empir_angle);
 
+peg_width = retain_stalk_len -
+  (handle_x0 - retain_mxy[0]) / cos(retain_empir_angle)
+  - peg_width_slop;
+
+peg_height = retain_cutout_h - (retain_rad + retain_stalk_h)
+  + retain_pushmore_adj;
+
+retain1_len = retain_len + retain_stalk_len;
+retain1_base = total_len - retain1_len;
+
+peg_len = retain_len;
+
 module InsertSection(){
   hull(){
     translate([-ins_irad, -ins_irad])
@@ -102,17 +122,40 @@ module HandleSection(){
       translate([handle_x1 - handle_rh/2, y])
 	circle(r = handle_rh/2, $fn=20);
   }
+  translate([ handle_x1 - handle_rh*2,
+	      handle_y1 - handle_rh/2 ])
+    circle(r = handle_rh/2, $fn=20);
 }
 
 module RetainSection(){
   translate(retain_mxy) {
     rotate(retain_empir_angle) {
       circle(r=retain_rad, $fn=20);
-      square([retain_stalk_len + 1, retain_stalk_h]);
+      translate([0, -retain_pushmore_adj])
+	square([retain_stalk_len + 1, retain_stalk_h]);
     }
   }
 }
 
+module PegSection(delta){
+  hull(){
+    translate([0, -delta/2])
+      square([0.1,
+	      peg_height + delta]);
+    translate([peg_width - 0.1,
+	       peg_height/2 - peg_inner_thick/2])
+      square([0.1, peg_inner_thick]);
+  }
+}
+
+module PegSectionForDemo(delta){
+  translate(retain_mxy)
+    rotate(retain_empir_angle)
+    translate([retain_stalk_len - peg_width - peg_width_slop/2,
+	       retain_stalk_h - retain_pushmore_adj])
+    PegSection(delta);
+}
+
 module RetainCutout(gapping=false){
   translate(retain_mxy) {
     rotate(retain_empir_angle) {
@@ -150,13 +193,32 @@ module BasicSection(){
   HandleSection();
 }
 
+module PegSectionSlice(lambda) {
+  delta = peg_wedge_more * (1-lambda) + -peg_wedge_less * lambda;
+  z = peg_len * lambda;
+  translate([0,0, z])
+    linear_extrude(height=0.1)
+    PegSection(delta);
+}  
+
+module Peg(){
+  hull(){
+    PegSectionSlice(0);
+    PegSectionSlice(1);
+  }
+}
+
 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)
+  bs1 = retain_len + overret_gaplen + 4;
+
+  translate([0,0,0])
+    linear_extrude(height= retain_len)
+    WithRetainSection();
+
+  translate([0,0, bs1])
+    linear_extrude(height= basics_len)
     BasicSection();
+
   translate([0,0, bs1+0.1]) mirror([0,0,1]) {
     intersection_for (sl=[0,1]) {
       multmatrix([[1,0,0,0],
@@ -167,11 +229,29 @@ module Handle(){
 	BasicSection();
     }
   }
+  
+  linear_extrude(height=total_len, convexity=100) GappingSection();
+
+  translate([0,0, retain1_base]) {
+    intersection(){
+      linear_extrude(height=retain1_len, convexity=100)
+	WithRetainSection();
+      translate([retain_mxy[0], retain_mxy[1], 0])
+	rotate([0,0, retain_empir_angle])
+	translate([retain_stalk_len, -30, 0])
+	multmatrix([[1,0,-1,0],
+		    [0,1,0,0],
+		    [0,0,1,0],
+		    [0,0,0,1]])
+	cube([50, 60, 50]);
+    }
+  }
 }
 
 module Demo(){
   color("red") translate([0,0,-3]) BasicSection();
   color("blue") translate([0,0,3]) WithRetainSection();
+  color("orange") translate([0,0,7]) PegSectionForDemo(0);
 }
 
 module Test(){
@@ -189,5 +269,6 @@ module Test(){
 //BasicSection();
 //GappingSection();
 //Test();
+Peg();
 //Demo();
-Handle();
+//Handle();