Balloon

thingiverse

EDIT December 3, 2011: Added Balloon v2 file with slight modifications to enhance slicing using Skeinforge. I discovered the best results when there was no infill. Be sure to review layers with strings prior to printing to prevent extruder issues. This design is inspired by Thing8's experiment with strings and tc_fea's Fractal Tree 2 (http://www.thingiverse.com/thing:4340). When showing the printed version of his tree, someone thought it resembled a balloon. So, I attempted to create a balloon design. I am quite pleased with the outcome! However, this print is challenging as a few strings may not make it across the gap during printing. Despite imperfections, it still looks visually appealing. An updated Balloon v2 file was created due to slicing issues with Skeinforge. Turn off infill for optimal results. The balloon part is printed sideways to create eight supporting strings for the gondola, which is oriented at 45 degrees on the build plane. Amazingly, these thin strings can support the weight of the balloon, as demonstrated in photos. Printed using a RapMan 3.0 with black UltiMachine PLA. For optimal printing, use 0.3mm layers and adjust layer thickness accordingly. The eight supporting gondola strings are single filament thick. Consider printing the gondola raftless. Attach the balloon and gondola parts together, easiest when the balloon part is upside down in a cup or bowl. While the completed model can stand on its base, hanging it from something might be more visually appealing. A stepper motor extruder may yield better results. Dimensions: Balloon - 90.5mm x 90.5mm x 106.7mm tall; Gondola - 43.8mm x 43.8mm x 20mm tall.