From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 13 Oct 2025 16:01:52 +0000 (+0100)
Subject: mudguard-bracket: Add bracket tie hole
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=f989a4b6b9b47a284783a6ece86d9f9ade476a5e;p=reprap-play.git

mudguard-bracket: Add bracket tie hole

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

diff --git a/mudguard-bracket.scad b/mudguard-bracket.scad
index 7fabb79..79ec84e 100644
--- a/mudguard-bracket.scad
+++ b/mudguard-bracket.scad
@@ -29,6 +29,8 @@ retainer_th = 3;
 clamp_main_th = 4;
 clamp_depth = 4;
 bracket_buttress = 2.5;
+bracket_tie_hole = 6;
+bracket_tie_around = 4;
 
 retainer_x_gap = 0.25;
 retainer_big_gap = 2.5;
@@ -46,6 +48,7 @@ bracket_bot_z = screw_hole_z - beam_h/2;
 bracket_top_z = screw_hole_z + beam_h/2;
 bracket_bot_xsz = tubeswidth_at_z(bracket_bot_z) + tube_dia * 2.5;
 bracket_top_xsz = tubeswidth_at_z(bracket_top_z) + tube_dia * 2.5;
+bracket_tie_outer_r = bracket_tie_hole/2 + bracket_tie_around;
 
 wing_top_ea_x = -tubeswidth_top/2 - wings_main_th/2;
 
@@ -191,6 +194,25 @@ module Bracket(){ ////toplevel
       linextr_y_xz(bracket_top_z - bracket_buttress, bracket_top_z)
 	rotate(180)
 	BracketButtressPlan();
+      translate([ 0,
+		  bracket_top_z,
+		  wings_height ]) {
+	linextr(-beam_th, 0) {
+	  difference(){
+	    hull(){
+	      translate([0, bracket_tie_hole/2])
+		intersection(){
+		  circle(r = bracket_tie_outer_r);
+		  rectfromto([ -100, 0 ], [ 100,100 ]);
+	        }
+	      rectfromto([ -bracket_tie_outer_r, 0 ],
+			 [ +bracket_tie_outer_r, 1 ]);
+	    };
+	    translate([0, bracket_tie_hole/2])
+	      circle(r = bracket_tie_hole/2);
+	  }
+	}
+      }
     }
     linextr(-1, wings_height+1) {
       for (m=[0,1])