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-rw-r--r--x-carriage.scad5
1 files changed, 5 insertions, 0 deletions
diff --git a/x-carriage.scad b/x-carriage.scad
index 8a9f0d9..c2552d2 100644
--- a/x-carriage.scad
+++ b/x-carriage.scad
@@ -12,24 +12,25 @@ 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 + slide_tolerance;
belts_apart = 12;
belt_pitch = 2;
+beltholder_chamfer = 1;
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() {
@@ -84,19 +85,23 @@ module xcarriage() {
hull() for(x=[mounting_holes_apart/2,x1])
translate([x,0,-r1-bgap])
rotate([90,0,0]) cylinder(r=r1,h=belt_width+2,center=true,$fn=30);
}
} // difference
translate([0,0,30/*heatsink height*//2])
for(mhft = mounting_holes_from_top) translate([mhft[0],0,-mhft[1]]) {
rotate([90,0,0]) cylinder(d=screw_d+2*play_tolerance,h=bearings_d+2*bearings_s+2,center=true,$fn=30);
translate([0,belt_width/2+screwhead_h+play_tolerance,0])
rotate([90,0,0]) cylinder(d=screwhead_d+2*play_tolerance,h=screwhead_h+play_tolerance+1,$fn=30);
}
+ ccs = (belt_thickness+2*beltholder_chamfer)/sqrt(2);
+ translate([0,-belt_width/2,belts_apart/2+belt_thickness/2-fit_tolerance/2])
+ rotate([45,0,0]) cube(size=[cw+2,ccs,ccs],center=true);
+
} // difference
}
print=false;
if(print) rotate([-90,0,0]) xcarriage();
else xcarriage();