DNA Helix Pencil Holder

thingiverse

This is a "two parts in one print" design with no raft or supports needed.Print the "DNA_Helix_Pencil_Holder_Full_06.stl" STL file After print, remove two parts from print bed. a. bottom of helix is outer print b. top of helix is inner print. (Optional) Use "DNA_Helix_Pencil_Holder_Optional_U_Snaps.stl" x 2 on the outside of the helix to secure the top and bottom parts together. These are pressure-fit snaps that fit on the outside of the Helix. Use a screwdriver to gently lever them out if you need to remove them. Assemble with glue, or your favorite adhesive to make the bond permanent. (I used super glue). With the snaps in place glue may be optional. Insert Pencils and display. Take a picture and post on Thingiverse :) I also have a Sharpie version: http://www.thingiverse.com/thing:1924310 I've also had requests for a smoother version: https://www.thingiverse.com/thing:2789838 Print Settings Printer: Maker Select i3 Rafts: No Supports: No Resolution: .15 Infill: 20% Notes: Update Notes: 10/27 added tongue and groove design added U-snaps and holes to create an optional "Glueless" fit added optional separate files for dual printers and customizations: a. "DNA_Helix_Pencil_Holder_06PartA.stl" - this is the bottom part b. "DNA_Helix_Pencil_Holder_06PartB.stl" - this is the top part c. "DNA_Helix_Pencil_Holder_Extension_01.stl" - this is an optional extension (so far untested). Put this part in the middle and add 8 pencils (or 8 DNA letter pairs). d. "DNA_Helix_Pencil_Holder_Optional_U_Snaps01" - this is a u shaped pressure fit snap that fits on the outside of the Helix into the two 4mm holes at the middle. (I'll add a picture to clear up any confusion). It should also be able to bond the optional extension. 10/4 Added a Smoother version fixed slic3r issue Added a tall version (215mm tall) for those with printers that can print that high. You probably need supports for the top of the design. If you get a successful print with the tall STL file, let us know the settings you used so I can post it here. For those like me with normal sized printers - use the "DNA_Helix_Pencil_Holder_Full_06.stl" file and follow instructions above. Post-Printing Use Snaps or Super glue bottom of helix to top of helix. (or use alternative bonding method).