An odd situation

[David Andersen]

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> Hey, Ric---
>=20
> With Yamaha, there=B9s always the chance that the glides have been adjusted=
 too
> far down, lifting the frame slightly. The Yamaha balance rail is super
> flexible, and some guys---Moi? Oh, no, mon ami!---
> use the glide bolts to regulate aftertouch.  So....uhhh...y=B9all could che=
ck
> that, bubba.
>=20
> best, DA
>=20
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> In a message dated 9/5/2004 1:33:55 PM Pacific Standard Time,
> Richard.Brekne@grieg.uib.no writes:
>   Ric
>   Good analysis. The short answer is your leverage is too good.
>    Now I thought 48 mmm was standard spec for blow on most of Yamaha gran=
ds. I
> would set letoff closer as you did to consume some dip/aftertouch.
>    Beyond this I suspect capstan placement could be too far back or perha=
ps a
> slight adjustment of the action spread would change the action key ratio
> enough to bring it back into tolerance. This is fairly unusual for Yamaha=
.
> With all their jigs & fixtures to assure uniformity action to action. Thi=
s is
> odd.
>    I don't like actions set up this way as the overall touch weight usual=
 ends
> up heavy as is the typical problem with Baldwin.
>  Are the knuckles perhaps to close to the center pin? This would also
> contribute to the problem. It could be one or more contributing factors b=
ut
> with Yamaha a compounding series of errors would be likely, Don't you thi=
nk?
>  Dale
>> So... in  the end.. I had 48+ mm blow, standard Yamaha spec letoff and
>> drop, 10 mm  dip,  64 mm key height and too much aftertouch with no real
>> way of  getting less.  Ok.. I could have fudged a bit on let off... but =
a
>> few  tests didnt really get me where I wanted... I would have had to go
>> with  about 2 mm in the bass... 1 mm in the treble, and a 9.5 key dip to
>> get the  aftertouch down to where I usually like it... which is by no
>> means too  little.
>>=20
>> Anyone got an idea as to what could be wrong here  ??
>>=20
>> Cheer
>> RicB



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