Overly-Complicated Trumpet (fully 3d printed!) - project
Description
PDF*6/11 Update: Still working on some new bell designs to get a better sound. Will post the files and video soon! Updated the mouthpiece files.
Note: This is an ongoing project and I will be making modifications to the design as I'm able to test it out. I'm open to any design suggestions the community may have!
Overview
I designed this slightly overly-complicated twist on a trumpet that is fully 3d printed! Typical brass instrument valves function by redirecting flow of air to different lengths of tubing to change the pitch of the instrument, and thereby play different notes. Instead of doing that, I decided to just have several valves that move slides (similar to a trombone) to extend the tubing length. All-in-all there are 6 valves at play here and they have the following lengths:
1st, 2nd, 3rd = 70mm (valve only needs to be depressed by 35mm since the U-tube doubles it)
4th, 5th = 90mm
6th = 110mm
I based the slide lengths off of a typical B-flat trumpet's valve combinations, and how much those lengthened the tubing, and made the conversion chart below:
| Extended Length of Tube | Standard B-flat Trumpet Fingering | Overly-Complicated Trumpet Fingering |
| 160mm | 1 | (1 or 2 or 3) + (4 or 5) |
| 70mm | 2 | 1 or 2 or 3 |
| 230mm | 1 + 2 | (1 + 2 or 1 + 3 or 2 + 3) + (4 or 5) |
| 430mm | 1 + 3 | (1 + 2 or 1 + 3 or 2 + 3) + 4 + 5 + 6 |
| 340mm | 2 + 3 | (1 + 2 or 1 + 3 or 2 + 3) + (4 or 5) + 6 |
| 500mm | 1 + 2 + 3 | 1 + 2 + 3 + 4 + 5 + 6 |
I made the design in OnShape and included the STLs and some g-code for optimized print time and quality.
Printing
I printed the in brown and orange PLA on the Prusa i3 MK3.
If you re-slice, just be sure to orient the parts and add supports similar to the g-code examples. To make things easier for re-slicing, I'll add some recommended slicer settings soon!
Assembly
The BOM is the following:
- 1x Frame
- 1x Mouthpiece
- 1x Bell
- 6x Top Valve Caps
- 6x Stem Caps
- 3x 35mm Stems
- 2x 45mm Stems
- 1x 55mm Stem
- 3x 35mm Bottom Valve Caps
- 2x 45mm Bottom Valve Caps
- 1x 55mm Bottom Valve Cap
- 3x 35mm Slides
- 2x 45mm Slides
- 1x 55mm Slide
- 3x 35mm Spring
- 2x 45mm Spring
- 1x 55mm Spring
More assembly instructions coming soon but, for now, I hope this exploded view helps!
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Tags
Model origin
The author marked this model as their own original creation.
