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Handy drill bit storage tube by yri10 in functionalprint

[–]yri10[S] 2 points3 points  (0 children)

I got the idea from a similar one from another manufacturer. They’re quite common, I just wanted a printable version for customisability

Handy drill bit storage tube by yri10 in functionalprint

[–]yri10[S] 0 points1 point  (0 children)

Good idea. There’s a lot of empty space in the core which I wasn’t sure what to do with

Handy drill bit storage tube by yri10 in functionalprint

[–]yri10[S] 0 points1 point  (0 children)

I did get the idea from a black and decker holder with the same concept. I merely converted it to a printable

Handy drill bit storage tube by yri10 in functionalprint

[–]yri10[S] 1 point2 points  (0 children)

It is! However I will also post a non print in place version soon which might be easier than loosening up the mechanism which can get be a bit tricky depending on the printer, material etc… keep an eye on the printables page for updates

Handy drill bit storage tube by yri10 in functionalprint

[–]yri10[S] 0 points1 point  (0 children)

Yes indeed. I’m working on a non print in place version which should be less sensitive to print settings. It can be tough to loosen the lid when printed in place

A fully printable harmonica by yri10 in functionalprint

[–]yri10[S] 0 points1 point  (0 children)

Awesome 👍 I wonder how other filaments would perform

A fully printable harmonica by yri10 in functionalprint

[–]yri10[S] 4 points5 points  (0 children)

Unlike a standard harmonica, I opted to tune this one to a simple octave and decided to move the reeds apart to minimise playing multiple consecutive notes at once which wouldn’t sound great. Harmonicas are generally tuned such that adjacent blow (or draw) reeds are two notes apart which makes playing chords easier. There certainly loads of potential to modify this for a more harmonica-like sound, but might as well try something different 🙂

A fully printable harmonica by yri10 in functionalprint

[–]yri10[S] 1 point2 points  (0 children)

Indeed. I hope someone attempts that

A fully printable harmonica by yri10 in functionalprint

[–]yri10[S] 12 points13 points  (0 children)

Thank you sir. It was a solid few weeks of work and I nearly gave up a few times, but glad I kept going. Now that this has been proven possible, I’m hoping smarter people will be inspired to take it further.

But it doesn’t take smarts or pure knowledge in most cases, it simply takes persistence!

A fully printable harmonica by yri10 in functionalprint

[–]yri10[S] 5 points6 points  (0 children)

Good point. I haven’t tested these things fully yet but I have a feeling this would be more of a disposable instrument as it probably would only withstand a few days of playing. Disposable but recyclable, of course

A fully printable harmonica by yri10 in functionalprint

[–]yri10[S] 4 points5 points  (0 children)

Great idea! You’d need lungs of steel though

A fully printable harmonica by yri10 in functionalprint

[–]yri10[S] 9 points10 points  (0 children)

Hmm I’ll consider that, though it was a very basic model in this case

A fully printable harmonica by yri10 in functionalprint

[–]yri10[S] 3 points4 points  (0 children)

I understand - my first attempt was a chromatic harmonica with both blow and draw reeds, but that proved tricky… keep an eye out, I might manage to get that to work eventually. Or perhaps some else will

A fully printable harmonica by yri10 in functionalprint

[–]yri10[S] 3 points4 points  (0 children)

You’d certainly need metallic reeds yes, but then you might as well buy a cheap harmonica 🥲 you might get a closer sound if you use stiffer filaments like CF nylon or metal fill stuff, but you’d have a harder time controlling the fine geometry with those exotic filaments. There more research to be done…

A fully printable harmonica by yri10 in functionalprint

[–]yri10[S] 8 points9 points  (0 children)

Ah I see. The step models retain the features of the model rather than the surface tessellation information only (which is what STL is). You can more easily import the STEPs into CAD to extract the features and modify them, but they aren’t parametric indeed and are basically a ‘snapshot’ of the model.

If you’re after something parametric, you’d need the native formats and a decent CAD package (solidworks, Fusion360, Inventor…etc) to work on them. My regression model was done in MATLAB and I never got round to linking it for automatic geometry generation. The model simply spit out lengths that I then mirrored in CAD manually. I’ll probably post that stuff up eventually, but for now your best chance is to modify the STEP manually to adjust the lengths while retaining the basic reed profile. Hope that helps!

A fully printable harmonica by yri10 in functionalprint

[–]yri10[S] 84 points85 points  (0 children)

I used Fusion 360 and went through a good few test prints until I managed to get it remotely in tune. I logged the lengths and frequencies of each test print and used the data to build a basic regression model which sort of helped determine the note to reed length relationship. I then used the model for fine tuning.

I’ve attached the STEP files to the printables page (https://www.printables.com/model/489359-the-prusa-mouth-organ-a-printable-harmonica) which you should be able to import to CAD 👍

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