This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment MessageWith one handle or without one Joe Goss imatunr@srvinet.com www.mothergoosetools.com ----- Original Message -----=20 From: David's Email=20 To: oleg-i@noos.fr ; College and University Technicians=20 Sent: Thursday, October 23, 2003 9:24 AM Subject: Re: Pinning and Tone With a handle David I. ----- Original Message -----=20 From: Isaac sur Noos=20 To: College and University Technicians=20 Sent: Thursday, October 23, 2003 12:56 AM Subject: RE: Pinning and Tone Don Mannino, hello, I noticed that Kaway with their ABS flange tend to take too much = play in the pinning indeed. As I understand it, because when the bushing = grows, the part can't swell because of the material, and when getting = dry after, some play is installed. I came to a few pianos where the birseye itself have developped = ovalisation with time (1978 models). So, while I like a lot the grand jack, I am far from convinced with = the other parts, for instance noise and extra friction on RX... grand = whippen lever, kind of feeling the weight and texture of the damper = lever in RX series. ABS does not give as tone, only thump. And I regret this, because I = appreciate your grands, after having installed in them firm Yamaha front = punchings (discard those cotton style punchings !) and regulate them so = the touch is more light, they tone very well generally (I mean for the = soundboard/strings/hammers parts) By the way are the broaches you sell to be used without a handle ?. Best Regards. Isaac OLEG Entretien et r=E9paration 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=20 -----Message d'origine----- De : caut-bounces@ptg.org [mailto:caut-bounces@ptg.org]De la part = de Don Mannino Envoy=E9 : mercredi 22 octobre 2003 19:20 =C0 : College and University Technicians Objet : RE: Pinning and Tone Alan, I see what you're getting at. I don't know of any simple answer = to troubleshooting the friction other than removing parts and testing = for friction. You can do general troubleshooting by swinging the action = to find the loosest and tightest parts, and you can measure down and = upweight to get general friction levels, but removing parts and feeling = the softness of the bushing and checking the friction with a spring = gauge are really the definitive way to know what's up. Here are some pertinent thoughts, though I'm not sure I can give = you any real helpful procedures to follow: - Too much friction causes a dull tone with poor projection and = sometimes poor sustain. It affects the action performance as well, of = course. - Too little friction causes no problems in tone at all in and of = itself. It is only because we are using cloth bushings that low = friction results in poor tone because the hammer is not controlled in = its motion well enough. Please understand me here - if you have a very, = very firm bushing that will pin with low friction and still have = excellent side control, the tone should be fine. It is the limitation = of using a soft bushing material that forces us to pin with sufficient = friction to get the control we need. It is not the friction itself = which gives good tone - it is the firmness of the bushing. - Teflon bushings gave excellent tone with 0 friction, but they = didn't last long enough. They were an excellent idea, but the bushing = material was not nearly as durable as good bushing cloth, so it deformed = with use and got noisy. - Poor quality cloth forces us to use more friction in the center = to get the controlled motion of the hammer. I used to work on some = grand pianos in the 80s that came from the factory with very poor, = spongy cloth in the hammer centers. I would re-size the bushings with = water and alcohol, then repin from the factory #19 pins up to #20 1/2 = pins. This made thinner, firmer bushings, allowed pinning at about 2 - = 4 grams friction, and resulted in dramatically improved tone. These = pianos were dull and lifeless from the factory with 6 to 10 grams = friction in the soft hammer centers, and a firm fit with lower friction = really made them sing. So, when evaluating friction levels in a given piano, I judge by = sound and by feel of the parts, and decide how to work with them. Now I = work mostly with Kawai parts, and the bushings are very firm with mostly = excellent control of the hammer. In dry climates they sometimes get too = thin in tone because the hammer center bushings dry out and become too = loose, and repinning them to fit the climate brings the power back up in = the tone. I find that if I pin for good solid tone in the mid treble, = that same friction level is great for the whole piano. Don Mannino -----Original Message----- From: Alan McCoy [mailto:amccoy@mail.ewu.edu]=20 Sent: Wednesday, October 22, 2003 9:30 AM To: College and University Technicians Subject: RE: Pinning and Tone Thanks Don, In part what I am trying to get at here is distinguishing = between friction and firmness in the bushing. Can you hear the tonal = difference between a note that has a friction problem vs one that has a = firmness problem? My normal procedure in reconditioning an action includes = checking action center friction, duh, and I check side to side play = gang-style checking for winking hammers, but I'm looking around to see = if someone has figured out a way to systematically check for both = friction and firmness in an efficient way (ie without painstakingly = removing every flange!!) Alan PS Bob, Sending them to Marcia is cheating! :-) Hope things = are great down there in Modesto. -----Original Message----- From: caut-bounces@ptg.org [mailto:caut-bounces@ptg.org]On = Behalf Of Don Mannino Sent: Wednesday, October 22, 2003 8:11 AM To: caut@ptg.org Subject: FW: Pinning and Tone Alan, The tone of the piano can be the best gauge, as poor pinning = has a pretty distinctive sound to it. I would describe it as a thin and = weak tone. Checking the friction level in a thin sounding note, = repinning it, and listening will tell you a lot. Experience is the best teacher here. I don't have a = specification to tell you, except firm enough by feel and a good solid = tone by ear. I suppose the engineers could give you a spec, though. X = amount of deflection with Y amount of force applied Z distance from the = pin. Don Mannino ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/81/05/7c/cf/attachment.htm ---------------------- multipart/alternative attachment--
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