| -rw-r--r-- | x-carriage.scad | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/x-carriage.scad b/x-carriage.scad index 9d0881e..3070242 100644 --- a/x-carriage.scad +++ b/x-carriage.scad @@ -1,56 +1,56 @@ 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 +bearings_s = 2.5; // 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 + 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]) |