francesco piasentini

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About francesco piasentini

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  1. francesco piasentini

    Double Viola case ???

    Riboni (Cremona) makes wonderful multiple cases. http://www.maurizioriboni.it/ITA/2viole 620S.html
  2. francesco piasentini

    3D printing files

    Wow! I did not tried it yet. Many thanks Carl.
  3. francesco piasentini

    3D printing files

    I don't know Fusion at all. I don't like the Autodesk policy. It just stopped Artacam and other packages in order to eliminate competitors. I use Rhino, which is a very powerful surface modeler (at least I saw wonderful works made with it), and has a very active user community. IMO it's a good solution for a violinmaker who wants to deal with mesh and Nurbs modeling. And it's the cheapest commercial software I found. It's NOT a pure parametric modeller, although this is not a big issue in violinmaking. Somebody is using FreeCad for parametric modeling: https://www.freecadweb.org/ it seems promising
  4. francesco piasentini

    3D printing files

    This could be originated when importing in Fusion 360, since the file is correctly scaled (see previous thickness evalutation). Could you double check this please? Maybe it's a matter of [cm] vs [mm]. BTW the stl I made is scaled in mm. See a fast measure (made in Rhino 6) below: Regarding the file dimension, you can easily decimate the mesh. But that means loosing some information.
  5. francesco piasentini

    3D printing files

    Google Drive doesn't like very much my stl. I uploaded the file here: https://www.dropbox.com/sh/5of8kupjl1bzfnu/AACgAe2jKPIkq0lK7ju082UWa?dl=0 Can somebody copy it to the folder "Violins" made by Barnes? edit: wait a minute: after a reboot it went fine in a matter of seconds: https://drive.google.com/open?id=1uaFs4hmVFBYvHMIVgZwVVQ1GwlbNMdSv
  6. francesco piasentini

    3D printing files

    For those who want to print and cut the file I'm uploading. Please consider that this is a fast conversion and that dimensional accuracy can be slightly improved with additional (and not minimal) efforts. This is true especially for thickness evaluations:
  7. francesco piasentini

    3D printing files

    You are welcome at booth 68bis. For those who want a violin with the soundpost on the right side ;-)
  8. francesco piasentini

    3D printing files

    I should be polishing my instruments for Mondomusica. After that everything is possible. Including mistakes! :-)
  9. francesco piasentini

    3D printing files

    too fast! :-) ;-) I reverse the Z and make it right-handed.
  10. francesco piasentini

    3D printing files

    Hi all. Thanks Advocatus. I did not even knew about these public scans. Betts DICOM image quality is very good! At least good enough for this kind of results: Please have a look at the drive folder, I created a subfolder "Violins". I'm uploading the stl there
  11. francesco piasentini

    Tap Tone or Plate Tuning Equipment

    I made some test with piezo transducers. I mean that kind of thing you find in chip watches as a "buzzer". It works. Since I have the expensive transducer, I prefer them. You still can find used stuff, especially in US (pcb and dytran). I considered it a good investment. I use the hammer for modal analysis, input admittance, sound radiation and internal pressure measurements. I achieved more consistent results in terms of sound and playability. And Iove making fancy coloured modal shapes. :-)
  12. francesco piasentini

    Tap Tone or Plate Tuning Equipment

    HW: -pcb miniature hammer -dytran smallest accelerometer -2x pcb old signal conditioners -M-audio M-track II -Dell precision M4400 SW: George Stoppani Suite for Modal and Sound Analysis
  13. francesco piasentini

    Tap Tone or Plate Tuning Equipment

    Far from having found any holy grail or mystical recipt, I track changes using Modal Analysis. This take time, but as soon as you learn how to do it quickly, this does not add an enormous amount of time. A matter of minutes, and you find that modes #5 often trade its place with neighours. Alternatively, you could place a mic close to the upper edge (point of maximum upper width) and hit in the middle with a felted wood stick. An fft would give you the first modes. Moving the stick around and averaging the fft will allows you to be more confident. Ok: easier to show than to explain! :-) (Plate can be sustained by elastic bands, or sitting on a morbid elastic foam such as a pillow foam) Again: very useful for tracking changes, not as an absolute characterization.
  14. francesco piasentini

    3D printing files

    I suggest a cloud solution: dropbox, google drive, microsoft OneDrive. With WeTransfer you can generate a one-week link for sharing.
  15. francesco piasentini

    3D printing files

    I'm interested too!