mudguard-bracket: maybe done?

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/mudguard-bracket.scad b/mudguard-bracket.scad
index 04948810dc42756f2eeceaa6993864f9ffd13fa9..240e0ce35f834769902b8a93d97ffcc1af80fc8c 100644 (file)
--- a/mudguard-bracket.scad
+++ b/mudguard-bracket.scad
@@ -26,11 +26,12 @@ beam_h = 15;
 beam_th = 4.5;
 wings_height = 15;
 retainer_th = 3;
-clamp_main_th = 3;
+clamp_main_th = 4;
 clamp_depth = 4;
 bracket_buttress = 2.5;
 
 retainer_x_gap = 0.25;
+retainer_big_gap = 2.5;
 
 $fs = 0.1;
 $fa = 3;
@@ -146,11 +147,15 @@ module WingElevation(){
 }
 
 module BracketButtressPlan(){
-  hull(){
-    rectfromto([ -bracket_top_xsz/2, -beam_th ],
-              [ +bracket_top_xsz/2, 0        ]);
-    rectfromto([ -wing_top_ea_x, -wings_height ],
-              [ +wing_top_ea_x, 0 ]);
+  difference(){
+    hull(){
+      rectfromto([ -bracket_top_xsz/2, -beam_th ],
+                [ +bracket_top_xsz/2, 0        ]);
+      rectfromto([ -wing_top_ea_x, -wings_height ],
+                [ +wing_top_ea_x, 0 ]);
+    }
+    rectfromto([ -wing_top_ea_x + wings_main_th/2, -beam_th - retainer_th - retainer_big_gap ],
+              [ +wing_top_ea_x + wings_main_th/2, -beam_th ]);
   }
 }
 
@@ -229,7 +234,7 @@ module Clamp(){ ////toplevel
     intersection(){
       hull(){
        Tubes(dr=clamp_main_th);
-       Tubes(dr=clamp_main_th, 5);
+       Tubes(dr=clamp_main_th, dyz=tube_dia/2 );
       }
       linextr(bracket_bot_z, bracket_top_z)
        rectfromto([ -100, clamp_near_y ],