these days, while studying a short phrase where only the right hand plays piano, I noticed that the Bb below middle C unfortunately tends to bounce a little if played piano but not pianissimo.
giving the mechanics a look was unfortunately not enough for my inexperienced eye; in fact, it only served to raise more doubts. Therefore, I am asking you: is it normal that if a key is struck softly and remains pressed, the hammer returns but not all the way to its resting position?? A position it only regains at the moment of total release?
and obviously, how do I eliminate the bounce of my Bb!??!~ help, thanks!
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Fra
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Reply 2 by Fra
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266
Davideee wrote:
Hi everyone
in these days, while studying a short phrase where only the right hand plays piano, I noticed that the Bb below middle C unfortunately tends to bounce a little if played piano but not pianissimo.
taking a look at the mechanics unfortunately wasn't enough for my inexperienced eye; rather, it served to raise more doubts. Therefore, I am asking you: is it normal that if a key is struck softly and remains pressed, the hammer returns but not all the way to its resting position?? A position it only regains at the moment of total release?
and obviously, how do I eliminate the bounce of my Bb!??!?? help, thanks!
Maybe the escapement is too close to the string, maybe there is too much aftertouch....
1) Comparing the aftertouch with adjacent keys, do you find it to be homogeneous?
2) Does the paramartello (jack), when playing softly, touch the leather of the wippen?
3) Is the spring (bretellina) correctly tensioned?
to tell the truth, the hammers leave a small space if I play softly, less than half a mm
the springs do not seem to me to be at maximum tension at all,
the springs are working well, in my opinion,
the dampers too,
as for point 1, it is not clear to me; unfortunately, I don't understand what you mean by background, and by adjacent keys
i would like to add that the test I performed was to lower the escapement buttons slightly using that screw with a small circle on the head, in order to force the escapement bar to move away a minimum amount sooner. In effect, it seems to have worked, but as I repeat, as an amateur I don't know if (though it doesn't seem so to me) my action implies any other unforeseen consequences (the key weight seems homogeneous and unchanged, at least significantly; the repeated note is clean and clear both forte and piano...) today I will call technical assistance since the piano is almost new; besides this, I would also like to receive some comments so as to get an idea and refine my experience a bit. thank you very much!
could you tell me what the background is please?? i was in a hurry and hadn't read the question carefully....but is it possible that there isn't a site with an exhaustive manual!?!?
When the hammer bounces, it is almost always due to insufficient key dip. By this, we mean the measurement from the resting position of the key to its full depression. To increase this distance, you can remove a little thickness under the key. It should be verified whether the general dip of the keyboard is shallow. A general check should be performed for other adjustments or impediments that a skilled Technician will be able to verify.
thank you for the explanation first of all. now that I know the definition of background, I can reply to the first message sent to me saying that, to conclude, the background of adjacent keys is homogeneous.
at this point I ask further: in light of this, do you think I did harm by adjusting the escapement buttons to prevent the hammers from bouncing (which only occurred in the piano)?? a technician will be at my place in a few days anyway. thanks in advance
F
Fra
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Reply 7 by Fra
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266
If you solved it by delaying the escapement a little, that's fine.... But when the technician arrives, have everything checked; with use, the felts tend to compress, including those of the escapement buttons, so the escapement reduces. I would definitely follow Pianoexpert's advice!
In my opinion, the hammer rails must brake the capstan even on pianissimo; it is not good if it remains free to oscillate!
I would therefore consider, if necessary, advancing the hammer rails a little as well....
P.S. Technicians are not all like Pianoexpert; sometimes they are touchy and do not like to discuss technique: always take the side of the person who does not know
Hello, regarding key rebound, having reached halfway through the stroke, perhaps even a little after, the hammer seems to have a small obstacle to overcome (the escapement lever, I believe); from there, by acting on the cylinder, I increase or decrease the hammer rebound. What is the advantage and disadvantage?
playing it, the keyboard feels more substantial but with less dynamics. HELPPPPPPPPPP
PS: my piano is an antique Bechstein grand
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Fra
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Reply 9 by Fra
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266
Small obstacle..... it might be the damper clips... They can be loosened a little! By taking care to delay the action of the dampers slightly by acting on the dampers, some benefits can be obtained....
One must also check the "pre-regulation"... I think I will have to make a short video on the "succession" of the regulation steps. The escapement column, in the tail, must be aligned with the inner line of the small wooden core of the roller, so verify if the depth is insufficient!
for Fra: thanks for the praise....I would say "put yourself in the shoes of someone who knows!"
