let ties tie tighter

1 files changed, 5 insertions, 2 deletions

diff --git a/x-carriage.scad b/x-carriage.scad
index 47ba499..3c2ee2f 100644
--- a/x-carriage.scad
+++ b/x-carriage.scad
@@ -49,33 +49,36 @@ module belt(pitch=belt_pitch,width=belt_width,thickness=belt_thickness,tooth=bel
 module xcarriage() {
  cw = bearings_l+2*bearings_m;	// carriage width
  % for(mz=[0,1]) mirror([0,0,mz]) translate([0,0,-belts_apart/2]) belt(l=cw+2);
  difference() {
   translate([-cw/2,-belt_width/2,-(rods_apart+bearings_d+bearings_m)/2])
   cube(size=[cw,bearings_d/2+bearings_s+belt_width/2,rods_apart+bearings_d+bearings_m]);
 
   for(sz=[-1,1]) translate([0,0,sz*rods_apart/2]) {
    rotate([0,90,0])
    cylinder(d=bearings_d,h=bearings_l,center=true,$fn=60);
    translate([0,-bearings_d/2,0])
    cube(size=[bearings_l,bearings_d,bearings_d],center=true);
-   for(sx=[-1,1]) translate([sx*bearings_l/4,0,0])
    rotate([0,90,0]) cylinder(d=bearings_d-bearings_m,h=cw+2,center=true,$fn=60);
    translate([-cw/2-1,-belt_width,-(bearings_d-bearings_m)/2])
    cube(size=[cw+2,belt_width,bearings_d-bearings_m]);
+   for(sx=[-1,1]) translate([sx*bearings_l/4,0,0]) {
     rotate([0,90,0]) difference() {
      cylinder(d=tiehole_od,h=tiehole_w,center=true,$fn=60);
      cylinder(d=tiehole_id,h=tiehole_w+2,center=true,$fn=60);
     }
-  }
+    translate([0,-tiehole_od/2,0])
+    cube(size=[tiehole_w,tiehole_od,tiehole_od],center=true);
+   } // translate for(sx)
+  } // for(sz)
 
   difference() {
    gap=belts_apart/6;
    translate([0,-.5,-gap/2])
    cube(size=[cw+2,belt_width+2,belts_apart+2*belt_thickness+gap],center=true);
    for(mx=[0,1]) mirror([mx,0,0]) {
     ofc = mounting_holes_apart/2+screwhead_d/2+belt_thickness+belt_tooth+play_tolerance; // offset from center
     r=1;
     x0 = ofc+r; x1=cw/2-r;
     z0 = r; z1 = belts_apart/2-belt_thickness;
     difference() {
      hull() for(x=[x0,x1]) for(z=[z0,z1])