Dale, Isn't this similar to what Yamaha does? Avery Todd On Mon, Jul 7, 2008 at 4:35 PM, <erwinspiano at aol.com> wrote: > > > > -----Original Message----- > From: erwinspiano at aol.com > To: ilvey at sbcglobal.net > Sent: Mon, 7 Jul 2008 2:33 pm > Subject: Re: Keyframe Bedding > > The key frames in modern grands all have a somewhat arched/pinched key > frame arrangement front to back & end to end. Adjusting the bedding bolts > to a neutral position to start with & then turning the bolts tighter against > the key bed is where the stressing comes from. You can measure the > subsequent rise at the front of the keys as the bolts are being turned as > per Jon Pages suggestion. The back of the frame is held down by the dags & > the ends by the key blocks > Actually this is also a bit of a buffer or safety factor for climate > changes. This way the bolts will hopefully stay in contact with the bed in > each season & not be so prone to change with humidity & temp. > Dale > -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080707/5e4ff098/attachment.html
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