Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Geared String Tuner Test Jig MK1

by Mr_MegaTronic, published

Geared String Tuner Test Jig MK1 by Mr_MegaTronic Mar 20, 2012

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My new YouTube Channel: https://www.youtube.com/channel/UCnnw56J_TeOsF4M_F5pPPJQ

Here we go!

This is the first experimental part for my Makerlele project!

The Makerlele is a 3d printable Ukulele! This is very much a hypothetical project and there is no telling if it will hold a tune long enough to play a song. BUT! The fun is in the try and who knows, there may be a way to make it work! ;)

This is a worm gear string tuner. The parts are supposed to print to maximize strength and smoothness of rotation. On the stem, there is a square core which prints laterally to give it flex strength when the string is under tension.

I just made a test block for it all to mount to to experiment with the design before I incorporate it into the head of the Makerlele.

I tried to design it to be totally printed but I'm not sure how the tolerances are or the overhangs on the worm. I will print this when I get home from work!

Stay Tuned!



The idea is sound but the implementation needs work...

I'm glad it printed though but yeah...I gotta re-think this design a bit.


Print, assemble like the render!

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How do the worm gears go into the holders? Does that have to be done during printing?

"Jigsaw" Soprano Ukulele that can be printed on a 20cm x 20cm bed.

Cool! Before I saw the title, I thought it was one of those things for Beyblades. I am going to use this to tune a homemade guitar!

I'm going to have to try this as an upgrade for my cheap $15 Rogue ukulele (which just uses friction pegs).

if you set the infill to 100% i'm sure it will work! I made a bottleopener, and normally the bottle cap would "chew" up the plastic, but when I tried to print it with 100% infill it would work. I've used it ton of times now, and there's not a single scratch on it!

I will be making a ukulele inspired from a cigar box guitar very soon, and I think that I'll use this on for the tuner :)

Thanks!  I'm actually working on the final design of this tuner along with the rest of my totally* 3D printed ukulele.

*save for strings and nuts and bolts.

Cool! I have been working on designing my own printable Uke for a little while and most of the time has been spent trying to design the tuning mechanism. I'm not sure if I will use yours or not, probably depend on if I can get mine working or not. But it is cool to have options. --Dylan

It is a challenge trying to design a reliable uke assembled from parts no larger than 100mm cubed.

But I'm up for the challenge!

Yeah it is. I'm taking the approach of designing the whole thing without worrying about the size constraints (too much) and then I will cut it up in cad and add tabs, groove, dovetails, etc. so I can assemble it after printing.

The body in my design is sort of like a pineapple style but is probably a little on the small size.

I went ahead and printed you tuner test and it does look like it could work, although it was bigger than I expected and I don't know how it would work scaled down. For my tuner worm gears I have p
retty much decided to print them out in 2 halves and glue them together.

Well I after I printed mine it does kinda work and it is indeed too big. That was on purpose to test the idea. However, to get better printing performance, I may have to change the proportion of the gears to be almost comically large compared to the head in the final version.