1 files changed, 13 insertions, 0 deletions

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
@@ -37,2 +37,6 @@ 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>;
@@ -68,2 +72,11 @@ module holder() {
    }
+   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() {