---------------------- multipart/alternative attachment On 17-nov-04, at 2:46, Alpha88x@aol.com wrote: > Greetings, > > > =A0=A0=A0=A0=A0=A0=A0 What sort of problem will conical punchings = cure? I mised=20 > something. > > Julia > Reading., PA Well, that is a subtle issue but not hard to explain : It is a matter of transferring energy. If the upper surface of the front punching is the smallest, the=20 transfer of energy will be enhanced to the bottom more easily. Suppose you strike a giant, non conical, front punching with your fist,=20= and you strike that front punching in the middle.... Part of the energy will be absorbed by the outermost sides of that very=20= same punching and the sides may even curl up a little. Now you have a giant conical front punching, meaning that the upper=20 surface is smaller that the bottom side, and you again strike it in the=20= middle. There is less mass on the upper side, so the transfer of energy to the=20= bottom is more direct. That's the meaning of a conical punching. Of course, the effect will be even stronger if the fabric of the front=20= punching is not soft, the way so many front punchings are, but instead=20= more dense and thus more firm. That's the beauty of the front punching I described before : It is more=20= dense because it is made of very dense felt instead of woven fabric. A more dense front punching allows for a more precise key depth. A more=20= precise key depth allows for a more precise regulation. A more precise=20= regulation allows for a more precise after touch. A more precise after=20= touch allows for a more precise hammer striking distance. A more=20 defined hammer striking distance allows for more energy, and more=20 energy allows for a better transfer of energy. So there the circle is rounded : one of the smaller parts of our=20 actions, the front punching, plays actually a major role in the forming=20= and making of tone. The making of tone is, in the end, what it is all about. Since you obviously have not followed the front punching discussion, I=20= will repeat what I wrote before : quote : " One of the very great developments of our business here in Holland=20 is the new front punching called "Grand Piano Punching". > I have worked for years on this and we now offer this punching world=20= > wide. > And why then is it so very nice one could ask? > Because it has a fantastic homogenous density, but at the same time it=20= > is not too hard. > It makes for a very sharp after touch, and thus for the sharpest=20 > regulation possible. > As I said, it took me years to get this together, and it is even=20 > better than the Yamaha or Steinway punching because of its density and=20= > firmness. > > I wrote about this before : after touch should be =B1 0,4 mm, meaning=20= > that after drop, and after the landing of the hammer, we should be=20 > able to move the hammer up 0,4 mm by softly pressing the key. If you=20= > see no movement at all, you have no after touch. If you see a lot of=20= > movement, your front punching is too soft or you have too much after=20= > touch.... which is it? > That's why you need to make sure that before you start a regulation,=20= > your front punching is of the right firmness. > > I will explain once more : > A key is like a sea saw. > Usually, we find an old car tire under both sides of the sea saw to=20 > soften the impact. Nevertheless, a little child sitting on the high=20 > end of the sea saw will bump upwards slightly because of the impact at=20= > the lower end. > Now, if we take away the tires, the impact will be much harder and it=20= > will hurt the behind of the child coming down, but it will also cause=20= > the other child to almost get airborne, because the force of the=20 > impact is much stronger. > That is the an analogy in regard to a more firm front punching : It=20 > causes a more intense transfer of energy and thereby creates a louder=20= > tone. > Your regulation can be more precise, thereby giving you the maximum=20 > tonal output. > > I often ask a critical technician or pianist to listen to a particular=20= > tone and to feel its touch. I then exchange the front punching with=20 > our own front punching, and I ask the same person to > listen and feel again. They always are flabbergasted by the result." unquote. This stuff is more important than you might think. So think about it deeply. *(; >))))) friendly greetings from Andr=E9 Oorebeek Vita Dura Est ---------------------- multipart/alternative attachment A non-text attachment was scrubbed... Name: not available Type: text/enriched Size: 4555 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/49/ec/7c/4f/attachment.bin ---------------------- multipart/alternative attachment--
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