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Wolfjk

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Everything posted by Wolfjk

  1. Wolfjk

    Centre seam

    Learn from an expert woodworker! A good joiner, wood machinist, violin or furniture maker may show you how to plane a perfect joint. However if you just wnt to be an amateur maker it is the method you find best gives you the satisfaction.
  2. Wolfjk

    Wood ID

    From the grain,colour and size of the block the wood is likely to be plantation grown indian rosewood, commonly called "sonokeling"
  3. Perhaps on the the back of the envelope she wrote: "Dear Sam, The first violin I bought from you was not very good> Would you make me another one at a reasonable price now you're famous?"
  4. How does your rocket fly? There is a reaction to every action.
  5. I'm am a bit surprised at some people not understanding what is happening when a violin is set in motion by being played! I can see clearly that the motion is caused by the sound waves exiting the reeds. The movements are more pronounced at the end grain- F-hole wings and where the arching is steep and exposes more reed endings. The movements are also effected by the way the plate was finished; a sharp knife or plane causes less chaotic movement than sanding or dull blade. The varnish layer, grain filler. and accumulation of dirt and wear also has an effect on the movement. The transfer of sound waves from the bridge to the plate is also a critical factor, so is the sound post stpping/restricting the reeds. Perhaps watching the movements of of the plate in slow motion my be more informative?
  6. Perhaps it the most sensible and most intuitive makers who can perceive it?
  7. Simply put, the lighter wood has larger cell/reed interiors and have more air t-o-wood ratio than closer grained heavier wood. Whichever way we look at it, the air inside the top plate and the internal structure of the spruce/ fir have some effect on resonance.
  8. It is logical to put the wider grain on the bass side as the tree grows faster and the wood is lighter. There is more air to wood ratio in earlier growth.
  9. Hands on experience indicates that once the wood is well seaoned (not just dried but exposed to the natural temperature and humidity changes of the seasons) the difference of expansion and contraction is less than at the start of seasoning. The reason the ribs are more likely to split on the blocks is the orientation of grain; up and across. The contraction/expansion lengthwise is afraction of across the grain.
  10. Hi, If you're planning to make your ribs from the same wood as your back make sure it is well seasoned and should give it at least 6 months to season in a dry place. As Jacob says in his post, slab cut ribs tend to split, especially near corners,top and bottom blocks. But they need a few handred years to do it if the ribs were well seasoned before bending. On the plus side, slabcut wood is a lot easier to bend. You may have to leave the ribs a bit thicker as slab cut ribs have a bit less resistance to downward pressure of chinrests and clamping. There are some slab cut ribs from more than three hundred years ago.
  11. Perhaps a handwritten certificate with your signature is the best and quickest way?
  12. Wolfjk

    Linings

    There are several Dutch makers (from Holland/Netherlands) who used the method of inserting the the ribs into the back plate, but very few instruments survived due to the backplate shrinking or repairs. There was a presentation in Dartington about these types of violins some years ago.
  13. It would be interesting to see what proportion of the plantation becomes fiddleback maple! All the books I read on the structure of wood indicated that rippled wood is incidental, and from pratical experience I can definitely say that fiddle back figure appears randomly in many different woods from all parts of the globe. The internal structure; figure, texture, specific weigth and medular rays are more influenced by weather and growing conditions. Genetics do influence the shape of the tree if there is no other interference. It is especially obvious in pine fir and spruce. Fruit trees have their own shape as well.
  14. Genetics are widely used in forestry and fruit growing. In forrestry, some trees follow the genetic make up and growing habits of the stock, others do not. It is especially obvious in tropical trees. Plantation grown rosewood and mahogony is inferior to naturally grown wood. See how they do with pernnambuco? If genetics were involved in fiddleback maple, there would have been forrest of it! Some trees don't follow orders
  15. There are quite a few trees I would like to try! Another good thing about Sheffield (UK) is that within 30mile or half hours drive one can see and observe many North American species of trees.
  16. Perhaps theprevailing wind directions are creating the ripples? The fiddleback figure is often found in leaning trees where it is caused by compression.
  17. In Central Eorope the White Poplar was regarded as best wood forcarving kitchenware, especially for bread making, washing and meat salting. The tree grows very fast and very big. Easy to carve, with white colour. Perhaps your violin is made by someone from central Europe? The neck looks like maple, the scroll perhaps Boxwood?
  18. The wood in this photo is not related to the European sycamore or the North american maple. It is from the american plane tree. The European sycamore (acer pseudoplatanus is named so because the leaves are similar to the plane tree leaves. The wood, the flowers and seeds are quite different. The wood of the North american maple can be very similar to the European sycamore. As North American maple was planted in Europe since the 17th century, there is a lot of cross polination.
  19. Tábor is not a hungarian cristian name. In hungarian it means a scout or army camp
  20. The back is probably made of willow or white poplar.
  21. It is very unlikely that Stradivari learned geometry in school. More likely he learned from a freemason or some masterbuilder I read somewhere that he was a woodcarver at some time in his life.
  22. That is interesting! Remember the Reed Theory? This happens with most fresly cut wood. It can be observed when damp piece of wood is machine planed> you can actually see the sap flowing infromt of the blade! It is same if one carves green wood, especially if it is felled in the growing season.
  23. I'm no scientist but have long experience in wood working. One of the most noticable characteristic of wood - especially the soft wood - is the soil condition it grows in. I'm sure if you found the place where the wood grew, you would find the same content today!
  24. It looks like some tropical wood, probably merranti. They use the sapwood for pallets.
  25. Hi, The smell probably comes from some cellulose thinner what was used in the varnish/laquer on the violin. You can mask the smell with a small cloth impregnated with lavender oil put in the violin case. Ten day remedies work by the sniffer getting used to the original smell
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