Small Test Whislte done in OpenSCAD

thingiverse

I designed a small whistle as an initial step toward building a playable ocarina. My intention is to create something that sounds reasonable as a closed container, and then drill finger holes starting with the lowest pitches. If everything goes well and I'm able to get it in tune, I'll measure the holes and add them to the model. Beginning with a 2cm cube, I added rounded corners using the built-in Minkowski function and then created a "mouthpiece" utilizing a fillet function from here: https://github.com/clothbot/ClothBotCreations/blob/master/utilities/fillet.scad Next, I hollowed it out and incorporated a fipple using the technique of TLAR (that looks approximately right) and was surprised that it actually produced a note (sort of). Some adjustments may be necessary here... Eventually, I'll create it a bit larger, as this was just a quick test print. I'm also trying various print orientations. I positioned it at 45 degrees on edge because the first layer usually appears pretty ugly and PLA printers seem to handle that much overhang fine without support. I've included the STL file without support for those who'd like to attempt it themselves. Thanks for taking a look! Update: numerous changes have been made to the .scad file. See github for the complete history: https://github.com/bobm123/maker I created a larger one with an interior volume of approximately 65 x 45 x 25 mm and included two STL files with support options I was experimenting with. According to my chromatic tuner, it produces a slightly flat C#. Next, I'll try to turn it into an ocarina. Instructions I produced my first print from the STL file with support, utilizing slices set for .25mm layer height and 15% fill. My print time was around 45 minutes. Same print settings were used for the larger version oriented on its side. Print time was about 2 1/2 hours. To generate a whistle at a different size, open whistle.scad and modify the length, width, and height parameters. You can also attempt one of my two attempts at generating support by removing comments at line 23, 24 or 25. If you opt for the unsupported version, you'll probably need to add some with your slicer. I abandoned the auto-generated supports as they kept messing up the interior, which is why the other two versions. If you try the 90-degree orientation, be cautious with the height, as you might run into trouble making the bridges for the top of the print.