This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment MessageI found this amusing, guess Don didn't take it that way. ----- Original Message -----=20 From: bruce greig=20 To: Don Mannino=20 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 -----=20 From: Don Mannino=20 To: 'bruce greig'=20 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]=20 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? =20 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.=20 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... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/9a/a9/b9/a8/attachment.htm ---------------------- multipart/alternative attachment--
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