MikeC

Have started working on number 3 VSO

beautiful

from dictionary .com Build - Verb construct (something, typically something large) by putting parts or material together over a period of time. This reminds me of something in the world of computer programming. In the licensed internal code of an IBM midrange there is a command called materialize object. So get out there and materialize a violin shaped object!

It can be a bit pricey but for the small quantities that violin builders would use I wouldn't think it would be a major expense. This is goat, they also have other types. They have quite a selection from whole hides to calligraphy sheets.

Why doesn't anyone use parchment?

and I thought trolololo was bad

Instead of an arch why didn't you make a flat section between the Cs and flat from there to both ends.

Hi E, what is burgundy pitch ? looks good so far!

I can't hear any difference. Maybe I just don't have good ears.

use a wooden plane like Strad and the boys, much easier to flatten one of those

The blue circled part, I make the arch match the arch of the violin top plate in that area, just for aesthetics. Anything else is just homeopathic violin tuning.

They didn't finish their own instruments? Where did you find that ?

probably sounds a little screwy

Well dang! you sat on my Amati, hey jr. go fetch another one.

Is that the same as we have here in Georgia called Kaolin? It's paper white not yellow. I have a 40 pound bucket of it Don't know what to do with it. Thought about selling it on Ebay. Some people in rural areas eat it.

steel will dissolve in vinegar if you leave it in there long enough

Also my thoughts on the gazillion circles. I only had the PDF and it took me some time and effort to understand but finally I got the linkages right and it works. I would kind of like to do it again just to demonstrate. It may not be real soon though, too much going on. I don't have the PDF handy but as I recall there were measurements for the linkages, even if the method of determining those measurements is too obscure to figure out. Seems like I remember it having something to do with the golden ratio.

Fred, do you mean the green copper colored stuff? It will turn yellow?

Since there were recent threads on drawing the outline using compass circles, which seems to me like fancy curve fitting but then maybe this is too but anyway, I thought about digging this up again and maybe do some kind of a video using the linkages to show how that works. But I got lazy and got too many other things going on, If you print out the instructions, it takes some careful reading and effort but the results are certainly interesting.

I never got the java code to work and no images, but I did print out the instructions and followed them. see my picture above from 2012. It was amazing how the three bar linkage accurately reproduced the outline of the violin, especially the C bouts both drawn in correct orientation and location with a single 3 bar linkage. It's a brilliant idea but I think it needs a little tweaking. As I recall it was not possible to draw the corners as described. 2012 was it that long ago, wow where does time go.

how many hours is the one in the middle? Thats a big change from the ones on the left and then not much change until the end.

copper compounds do tend to that color

Yep

Hi Worley, thanks for that info. After or during the cook do you combine the copal with linseed oil? I have some Manilla copal and seems like alcohol is the only thing it will dissolve in. I haven't tried doing anything with it in a long time.

Worley, I'm more interested in your cooking of copal. When I tried that it turned to an opaque concrete. Can you give some details on that?