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Organ Pipe Foot  Parametric Customisable 3D Printer File Image 1
Organ Pipe Foot  Parametric Customisable 3D Printer File Image 2
Organ Pipe Foot  Parametric Customisable 3D Printer File Image 3
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Organ Pipe Foot  Parametric Customisable 3D Printer File Image 5
Organ Pipe Foot  Parametric Customisable 3D Printer File Thumbnail 1
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Organ Pipe Foot  Parametric Customisable 3D Printer File Thumbnail 3
Organ Pipe Foot  Parametric Customisable 3D Printer File Thumbnail 4
Organ Pipe Foot  Parametric Customisable 3D Printer File Thumbnail 5

Organ Pipe Foot Parametric Customisable

Viragored avatarViragored

July 30, 2024

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Description

OpenSCAD code to create organ pipe feet, customisable for size and shape

I had looked at as many different pipe-foot creators as I could find on the internet, and concluded that none of them (that actually worked) was suitable for my planned project without a lot of alterations. It seemed easier to start from scratch and work out a configurable model in OpenSCAD. 

The resulting code has a lot of options, and I've checked it out with a number of different size settings, PVC tube resonator sizes, and filaments. The results are satisfactory and I have some usable, tuneable pipes. 

I've posted some sample .stl files. To enable printing without support I've created the foot in two parts. Mine are stuck together with superglue, which seems to have given an airtight seal. It's likely anyone using this code will want to set their own parameters so these .stl files are just for illustration.

My original aim was : Produce a foot that must print without supports, based on these premises:

  • Walls will be thick enough to support PVC pipe while organ being moved, eg on a cart over rough ground
  • PVC pipe will be used for the resonating pipe
  • The pipe will be stopped, not open
  • Frequency will be given
  • Mouth height calculated using frequency in this formula (stopped pipe) MH = [3.018 - 0.233 ln f]^5 (MH = Mouth Height; f = Frequency; ln = natural log)
  • Flue (the slot in the languid through which air is blown) needs printing at high resolution for accuracy
  • flue_width calculated from the Ising formula (link below)
  • Stem diameter, inside diameter of the stem connecting to the windchest
  • Foot length - from windchest to mouth to resonator = user's choice

The code and other details are on Github:
https://github.com/viragored/organ-pipe-foot/tree/main 

I'm now at the stage where I need to learn much, much more about organ design and construction to go further with this. The next major step would be creating bellows and pressure box that would enable me to check accurately the pipe voicing and tuning. That could take a lot of time!

So here is the work as far as it has progressed. Any comments from interested viewers will be most welcome.

License:

Creative Commons — Attribution

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