Double Helix with a sphere

thingiverse

I was experimenting with OpenSCAD while testing my Marketbot 2 printer. Here's the code to recreate it in OpenSCAD: ```scss 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); } ``` I discovered that my Marketbot 2 struggles with filament lines in the gaps. To resolve this, I slowed down the movement to 90 mm/s.