From 02e67d4d4976290d500ce7e7081ae5d2f213939c Mon Sep 17 00:00:00 2001
From: Michael Krelin <hacker@klever.net>
Date: Fri, 22 Jul 2016 22:47:49 +0000
Subject: protrusion to hold the fanholder link

---
diff --git a/x-carriage-adapter.scad b/x-carriage-adapter.scad
index 9cf6c08..9891072 100644
--- a/x-carriage-adapter.scad
+++ b/x-carriage-adapter.scad
@@ -35,6 +35,10 @@ back_thickness = 8;		// thickness of the part behind the hinge
 nut_thickness = 2.5;		// intelligent guess should suffice
 nut_width = 5.5;		// intelligent guess should suffice
 
+link_thickness=3;               // thickness of link holder protrusion
+link_or=3.5;                    // link outer diameter
+link_ir=1.5;                    // link inner diameter
+
 use <threads.scad>;
 /* the internal thread for e3d bowden coupling: http://e3d-online.com/E3D-v6/Spares/Threaded-Bowden-Coupling-1.75mm-Filament */
 module pushfit_thread(h=thread_h) {
@@ -66,6 +70,15 @@ module holder() {
      cylinder(r=rs,h=thread_h,$fn=30);
     }
    }
+   difference() {
+    hx0 = max(mounting_holes_on_top[1][1],mounting_holes_on_top[2][1])+screw_shell_d/2;
+    hull() {
+     for(ls=[-1,1]) translate([0,hx0+ls*link_or,thread_h+ls*link_or])
+      rotate([0,90,0]) cylinder(r=link_or,h=link_thickness,center=true,$fn=30);
+    }
+    translate([0,hx0+link_or,thread_h+link_or])
+    rotate([0,90,0]) cylinder(r=link_ir,h=link_thickness+2,center=true,$fn=30);
+   } // difference
    hull() {
     translate([0,0,thread_h/2]) cube(size=[hs_size[0]-2*hinge_s-2*slide_tolerance,feed_shell_d,thread_h],center=true);
     translate([0,-hff,thread_h/2])
--
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