The world's first robust hourglass 3D-printed from PVB. Uses sugar (!) to exactly count 2x 90s for cleaning teeth.
To rid the teeth of sugar and other plaque, they should be brushed for 3 minutes after meals. With this design, you can use sugar to help you measure the time to brush your teeth. For this the sugar-powered hourglass counts exactly 90s twice to help with timing.
The design is made of partially smoothed PVB for the “glass” and ultra silk PLA for the connector and decorations. The unique connector design eliminates the need for glue or other material and still provides a very stable hourglass that can be easily disassembled at any time.
For a complete description including step-by-step instructions and source code please head over to my project page at Prusaprinters.org: https://www.prusaprinters.org/prints/68338-the-tooth-of-time
Most of the design has been implemented in OpenSCAD (the source code is provided for download on the project page). The tooth has been taken from https://www.thingiverse.com/thing:2355022 by drzymala, which in turn has been derived from the "human tooth model" by Svenergy https://www.thingiverse.com/thing:1485531.
If you like the design then please do me a favor and post a make! Thank you very much!