Double Helix with a sphere

thingiverse

I made this while working on OpenSCAD and testing out the abilities of the Marketbot 2. Here is the code to make it in OpenSCAD module bar(){ cube([100,4,1], center=true); translate([50,0,0]) cylinder(r=3, h=1, center=true); translate([-50,0,0]) cylinder(r=3, h=1,center=true); } ; difference(){ union(){ for (i = [0:360]) { rotate([0,0,i]) translate([0,0,i]) color([.5,0,0]) bar(); } for (i = [0:360]) { rotate([0,0,i+90]) translate([0,0,i]) color([0,.5,0]) bar(); } } union(){ cylinder(r1=10,r2=30,h=170); translate([0,0,190]) cylinder(r1=30,r2=10,h=170); } } translate([0,0,180]) sphere(r=50, center=true); translate([0,0,180]) cylinder(r=4,h=360,center=true); cylinder(r=55,h=2,center=true); translate([0,0,360]) cylinder(r=55,h=2,center=true); for (i= [128:132]) { rotate([0,0,i]) translate([0,0,i]) cube([100,4,2],center=true); rotate([0,0,i+90]) translate([0,0,i]) cube([100,4,2],center=true); } Instructions The makerbot struggles with filament lines in the gaps. I slowed down the movement to 90 mm/s.