I confirm, thanks for the picture. Loosing the usual feedback fro roller/jack & lever friction was very uncomfortable to the pianists that try it. Its amazing how that friction seem to be important to them for control tone. I believe they use it the same way we use sound energy for tuning as some parameter we like to count on . That is why actions that have the roller graphited are always less expressive I guess. But this can also depend of the pianist way of playing. Greetings. Isaac OLEG Entretien et réparation de pianos. PianoTech 17 rue de Choisy 94400 VITRY sur SEINE FRANCE tel : 033 01 47 18 06 98 fax : 033 01 47 18 06 90 cell: 06 60 42 58 77 > -----Message d'origine----- > De : pianotech-bounces@ptg.org > [mailto:pianotech-bounces@ptg.org]De la > part de JBairdRPT@cs.com > Envoyé : lundi 23 juin 2003 04:50 > À : files@ptg.org > Objet : Experimental knuckle, actually roller > > > On display at the Europiano Congress in Dessau, Germany > last month was > a Steingraeber grand piano with experimental knuckles > installed (see > photo). These knuckles are actually small felt wheels that > rotate on a > pin. Holding the shank off of the repetition lever, you can > spin the > knuckle with your finger. > > The Steingraeber people say that this knuckle reduces the > downweight by > about 10 grams, but has no effect on the upweight. Initial > reports are > that children like the touch, but that pianists do not. > > > John Baird, RPT > Registered Piano Technician > Ph (217) 429-5651 > Cell (217) 433-5651 > > > [Photo at:] > > https://www.moypiano.com/ptg/files/attachments/d2/b6/f0/7e/ > des13rollerknucklee2.JPG > > [Alternate URL:] > > http://tinyurl.com/ezse > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives >
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