This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment MessageBruce, that is the list, things are easily perceived different from what they are intend to ! Don gives a good very true and honest iadvice there. That correspond well with what I've find on these pianos. The French tech from Kaway told me that front bedding occur a tad more often than wished. When new they have been done right generally, but where does this instability (to high fluctuations) come from ? Many KG2 are kerfed, may be from the start, but the kerfs are not filled. Despite that they move, I have not thought of trying to bed them presently in winter, a good point. Many Steinway are knocking, Yamahas too are to be bedded day in day out, this is less worrying me with time... 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 bruce greig Envoyé : jeudi 12 juin 2003 19:19 À : Piano Tech List Objet : Kawai bedding response (could be humor) I found this amusing, guess Don didn't take it that way. ----- Original Message ----- From: bruce greig To: Don Mannino Sent: Wednesday, June 11, 2003 10:26 PM Subject: Re: Kawai KG2D #1582033 Thanks, Don, you do realize what your're saying here.......... I have to say, though, that this sounds like the piano only needs a thorough, back front and balance bedding. Rather than trying to do a quick re-adjustment, allot the time to do the whole job and you will likely find that the problem will be solved. When we hear this kind of "It's always been this way" complaint, this almost always means that no one has taken the time to properly bed it. don't you? Bruce ----- Original Message ----- From: Don Mannino To: 'bruce greig' Sent: Tuesday, June 10, 2003 6:52 PM Subject: RE: Kawai KG2D #1582033 Bruce, Kawai keyframes should be bedded flat with no pressure on the keyframe guide pins. Generally if this is done during a dry time, the keyframe will stay knock-free during humid weather, but extreme conditions can cause the keyframe to move one way then the other with the seasons. Adjusting the balance rail glides will not stop front rail knocking (unless they have been grossly misadjusted), and your message does not make it clear why you would adjust the glides to stop knocking, then be concerned about pressure on the guide pins for the front rail. Repeated re-beddings can cause the front rail lip on the bottom to be worn away, so that black keys will always knock on hard blows and it is difficult to re-bed things. In this case, you should glue a strip of hard wood veneer along the front edge, about 1/4" wide or so. This can be done only at the ends if needed, or along the full length of the rail. Use aliphatic resin glue, then iron it down with a warm iron and wax paper. After the rail lip has been rebuilt, a lot of sanding and re-bedding should be done. You say you are familiar with keyframe bedding procedures, so I don't need to give you details for redoing the keyframe back, front and balance rails. The key dip should also be reset if the front rail is thickened. If the location of this piano has extremes which require key block hold downs, you should be able to use the RX style keyframe guide blocks. This should not be done until after the keyframe itself is well bedded, though. In some extreme cases the keyframes have needed kerfing and wedging, but this is pretty rare. If the front rail lip is still in good shape, and the keyframe ends warp up 1/4 in the winter, then getting it kerfed flat will make it flat for you. I am in Japan this week, but Nick Gravagne and Andrew Thomas are in the office if you want to call and talk to one of them about this. The number is (800) 421-2177. Don Mannino RPT, Manager Kawai Piano Technical Support, US and Canada dmannino@kawaius.com www.kawaius.com -----Original Message----- From: bruce greig [mailto:bgreig@nyc.rr.com] Sent: Tuesday, June 10, 2003 12:30 PM To: acoustic2@kawaius.com Subject: Kawai KG2D #1582033 I've been servicing the above piano for about two years. According to the owner, it has always had a problem with keyframe knocking and even after glide adjustments, the knocking always returns. I've also found this to be true. On my last visit, repeated attempts at glide adjustments including the ones reachable only from the underside, were fruitless. I also observed that the treble keyend block was not even touching the keyframe guide pin. Please note that I am well experienced with keyframe levelling procedures. My questions now are: should this piano have front rail keyframe or keybed glides installed and can you provide those parts (ones similar those on the underside of the center rail.) with directions for installation? and, what approach do you advise for the ineffectual key end block situation? As a stopgap, I put a couple thumbtacks on the underside of the front rail, which has stopped the knocking. I will be preparing this piano on Friday for performance use and would appreciate any advice asap. Thank you. Bruce Greig, PTG, RPT ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... 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