francesco piasentini

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About francesco piasentini

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  1. I like light wood (350-380 kg/m3 for Spruce and 580-620 for maple). It is not so difficult to find 360 kg/m3 in Fiemme valley (Ciresa and Paneveggio forestry guardians) or Latemar. Of course it helps a lot if you go by your own with a suitable scale and tape meter (or a couple if you are shopping cello wood). People are happy when you buy, and let you stay for a whole day moving wood blanks.
  2. Thanks Martin. So these bars where added to existing instruments (retro-fitted) or only as an option in new ones? Another example: https://forum.le-violon.org/viewtopic.php?t=11711
  3. Hi there, I got new pictures from previous bassbar change. Lots of stamps and handwriting. At least, the black soundpost area is coherent with Christian's C-M one. Are this details pointing to something made or adjusted by Charles Jean Baptiste Collin-Mezin? Charles Collin-Mezin Jr.?
  4. Thansk for the replies! I'm very curios about this story. It seems coherent with a French origin. Where the Monzino could have bought these violins? In white or already varnished? (see pics.) According to your knowledge, Is there an approximative time window for this specific bassbar design? I was wondering it this feature could have been also a strategy for reducing the time needed for fitting it. (That's my speculation for a factory production).
  5. Hi there, this bassbar came into my studio, together with a labelled Monzino&Sons violin from which it was recently removed by a violinmaker. It came into my mind Bayon's trade secret citing a Lamy patented bassbar. Does anybody recognize this stamp? Thanks for the help
  6. Great! Carl, do you have enough room in you printer for printing the scrool only? I mean: with layers parallel to maple rings. This would save you a lot of time (and material), but of course you will have the scrool only.
  7. Simplicity is not always the main advantage of digital solutions! :-) By the way you can carve your archings, have it scanned with a 3D scanner and replicated with a CNC router.
  8. Very nice work HoGo! Theorethically you can make parametric shapes with the Grasshopper plugin. Far from being immediate for violin archings, apart from operations such as simple 1D scaling.
  9. Riboni (Cremona) makes wonderful multiple cases. http://www.maurizioriboni.it/ITA/2viole 620S.html
  10. Wow! I did not tried it yet. Many thanks Carl.
  11. 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
  12. 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.
  13. 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
  14. 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: