widened opening for the bearings

1 files changed, 2 insertions, 0 deletions

diff --git a/x-carriage.scad b/x-carriage.scad
index 6dc5b67..47ba499 100644
--- a/x-carriage.scad
+++ b/x-carriage.scad
@@ -35,48 +35,50 @@ module belt(pitch=belt_pitch,width=belt_width,thickness=belt_thickness,tooth=bel
  translate([-l/2,-width/2,-thickness])
  intersection() {
   union() {
    cube(size=[l,width,thickness+tolerance]);
    for(x=[0:pitch:l/2]) for(s=[-1,1])
     translate([l/2+s*x,0,thickness])
     rotate([-90,0,0])
     cylinder(r=tooth+tolerance,h=width,$fn=6);
   }
   translate([0,-1,0])
   cube(size=[l,width+2,thickness+tooth+1]);
  }
 }
 
 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]);
     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);
     }
   }
 
   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])
       translate([x,0,z])
       rotate([90,0,0]) cylinder(r=r,h=belt_width+2,center=true,$fn=30);
      translate([cw/2,0,belts_apart/2]) mirror([0,0,1]) belt(width=belt_width+2,l=cw/2+2,tolerance=fit_tolerance);