catnip

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  1. There are two or more different types of notebooks. One is for your own notes as a summary of the key information on how you make a violin.... with lots of diagrams and measurements. The other is information that is unique for each violin you make so that you can review important details later. The third is how you varnished each violin.
  2. The box is closed and now it is time to move to the scroll. I now have to match the grain and flame of the ash with a maple neck block. I have a pre-cut (profile ) of a maple neck block but it was cut a long time ago and so does not conform to my method now. I tried to adapt my "printed scroll label" to this matching maple block but found out two things that bothered me. The pegbox was about 4 mm shorter and it was a bit too heavy. It would end up being about 10 gm heavier. Luckily I was able to find another more suitable one... similar grain and lighter.
  3. Just curious... What resources (books, videos etc) are you using. As was mentioned the best feedback is honest criticism of your work. Do you play the violins so that you can assess your sound personally without relying on polite comments. Setup and adjustments are also big component of violin making. Thanks for the pictures of your violins.
  4. The top is a one piece spruce 0.34 gm /cc which is on the light side. Because the grain lines are very close on the treble side compared to the bass side I decided to angle the treble f hole a bit more to cut more of the grain lines for more freedom of movement in that area. I also do a bit of fluting of the lower f-hole wings.
  5. I have two 4/4 violin scolls almost at the same stage and one (soft ample) weighs 108 gm and the other (quilted maple) weighs 121 gm. Weight will be removed when you fit the neck to the fingerboard. What weight were you expecting to get at this stage?
  6. Just to finish up this Matlab (Octave) contour program in case there are some interested programmers. I could not find an easy way to exclude the boundary points using one if statement so I used a For Loop to iterate through all the values in the vector (1 dim array). Here is the code. It is a bit of a "hack" since if an internal point has the same value as an boundary point it will also be excluded. So I am going to leave as is for now. for i = 1 : length(z) if z(i) != 4.2000 % boundary value of the edge text(x(i),y(i)+10.,[num2str(z(i))],'FontSize',20); % plot
  7. I looked up plotting text at an (x,y) location and just added this line to my program. It plots all z values. Maybe later I will exclude the outline. text(x, y+10., [num2str(z)], 'FontSize', 20); % plot z value with a y offset Matlab ( or Octave ) is a very efficient programming language since the default type is a vector. No need to write For.. Loops.
  8. Also my octave program does not plot the z value at the (x.y) location. Probably one more statement should do it. Maybe I will look into that added feature later.
  9. That plot was done using the MAG-ic probe software. But it creates a textfile with all the data points which can be read by my octave program. I have solved the "island" problem which occurs if the thickness of outline points are equal to or less than any thicknesses of near by internal points. This is not a problem for the top since an outline of 4 mm is thicker than any inside grad. I had to increase my back outline points from 4 to 4.2 and the "islands" disappeared. Here is the Octave plot using the same internal data points for comparison. I should reduce the resolution or the nu
  10. Back at it again. Here is the back completed. This QS ash was very stiff so I had reduce my usual graduations to reduce the weight and introduce more flexibility.
  11. If you use 12 mm and 15 mm you get pretty close to the 1/7 method for "standard" violins
  12. I use a cardboard template to help find a good placement for the outline Tracing the outline of the corner blocks Trying a new method for cutting the C- lining slots similar to the way Peter Westerlund does it. It takes a bit of practice but it very efficient. Before I do the purfling I temporarily attach the back with double sided tape. Closing clamps apply pressure to the tape to ensure a good bond.
  13. This guy uses the "lock and key" method to carve a scroll (around ~15 min mark).
  14. A USB floppy drive is only the start of a long journey for file recovery. If the files are in proprietorial format of some obsolete music program (before the days of musicxml) that only ran in win95 like MusicTime it requires a time machine. Still is possible but it is a journey.
  15. Woodessence.com has a wood color matching chart based on the dyes (water soluble) that they sell. This may help you get started Fruitwood 1 part Burnt Umber + 1 part Burnt Sienna + 1 part Raw Sienna Walnut 3 parts Burnt Umber + 1 part Burnt Sienna Early American 2 parts Raw Umber + 1 part Burnt Umber Provincial 1 part Raw Umber + 1 part Burnt Umber Golden Oak 3 parts Raw Sienna + 2 parts Raw Umber Ebony 4 parts Raw Umber + 1 part Black Cherry 4 parts Burnt Umber + 3 parts Burnt Sienna + 1 part Black Ipswich Pine 3