The file 'Iris Box 3D Printer Model' is (stl,CATPart,zip,dxf) file type, size is 983.3KB.
Inspired by http://www.thingiverse.com/thing:4244 this is a box that opens when you twist the outer rings in opposite directions. See this video by Labmat: http://www.flickr.com/photos/matthewlaberge/5101233486/
Edit I: Design has been modified to increase the clearance between moving parts. I've also centered and oriented the parts in better positions for printing.
Edit II: Design files posted. DXF, STEP and the original CATpart for those with access to Catia. Thanks to everyone for your photos, videos and design feedback!
Edit III: Be sure to check out Jon Hodgins' version: http://www.thingiverse.com/thing:5589
Base_V2.stl | 341.2KB | |
Iris_Box_V2.CATPart | 2.0MB | |
Iris_Box_V2_STEP_files.zip | 187.1KB | |
Iris_V2_DXF.dxf | 75.6KB | |
Retainer_V2.stl | 181.5KB | |
Ring_V2.stl | 464.1KB | |
Shutter_V2.stl | 69.9KB |