Keyframe Bedding

[Avery Todd]

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
>
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