widen our idea of belt width

so that it's sure not to stick out

1 files changed, 1 insertions, 1 deletions

diff --git a/x-carriage.scad b/x-carriage.scad
index 1128e64..9d0881e 100644
--- a/x-carriage.scad
+++ b/x-carriage.scad
@@ -1,69 +1,69 @@
 slide_tolerance = .3;
 play_tolerance=.4;
 fit_tolerance = .2;
 
 bearings_l = 25;	// 15;
 bearings_d = 15;	// 12;
 bearings_m = 2.5;	// thickness of the bearing end holder
 bearings_s = 4.5;	// the minimum shell between bearings and carriage front
 
 rods_apart = 45;
 rod_d = 8;
 
 mounting_holes_from_top = [	// the offsets of mounting holes on the back
  [0, 20], [-4.5,10], [4.5,10]
 ];
 mounting_holes_apart = mounting_holes_from_top[2][0]-mounting_holes_from_top[1][0];
 
 belt_tooth=0.70;
 belt_thickness=0.75;
 belts_thickness = belt_thickness*2+belt_tooth+0.5;
-belt_width = 6;
+belt_width = 6 + slide_tolerance;
 belts_apart = 12;
 belt_pitch = 2;
 
 tiehole_id = bearings_d+3;
 tiehole_od = bearings_d+10;
 tiehole_w = 4;
 
 screw_d = 3;
 screwhead_d = 5.5;
 screwhead_h = 3;
 
 module belt(pitch=belt_pitch,width=belt_width,thickness=belt_thickness,tooth=belt_tooth,l=100,tolerance=0) {
  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();
  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,bearings_l,center=true,$fn=60);
    for(sx=[-1,1]) translate([sx*bearings_l/4,0,0])
     rotate([0,90,0]) difference() {
      cylinder(d=tiehole_od,h=tiehole_w,center=true,$fn=60);
      cylinder(d=tiehole_id,h=tiehole_w+2,center=true,$fn=60);
     }
    rotate([0,90,0]) cylinder(d=bearings_d-bearings_m,h=cw+2,center=true,$fn=60);
    translate([-cw/2-1,-belt_width,-(bearings_d-bearings_m)/2]) cube(size=[cw+2,belt_width,bearings_d-bearings_m]);
   }
 
   difference() {
    gap=belts_apart/6;
    translate([0,-.5,-gap/2])