Yamaha problem

[Robert Moffatt]

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----- Original Message -----=20
From: Robert Moffatt=20
To: Avery Todd=20
Sent: Wednesday, September 20, 2000 12:25 AM
Subject: Re: Fw: Yamaha problem


Avery,

Yes that's the one. I have done many of these repairs. Once again..take =
a close=20
look at the rail. With the symptoms you describe, the problem is a bent =
rail. Almost
always. The rail doesn't look bent...but it is. First... purposely, =
because of the action screw,
but very..very slight deviations in the rail will cause the uneven =
damper lift. Take the action
and give it a good bend. This will certainly show you where the problem =
stems from.
If you had to rebend all of the damper wires....(I don't think anything =
would cause them all to move
haphadsordly, due to a bent "hanger"). Bending the damper wires will =
correct the visual problem...
but won't address the real problem. If it were a bent hanger, replacing, =
or correcting the bent
hanger should address the problem. If not.....then back to the rail.

Warm regards,

Bob


----- Original Message -----=20
From: Avery Todd <avery@ev1.net>
To: Robert Moffatt <moffattr@cadvision.com>
Cc: <atodd@uh.edu>
Sent: Tuesday, September 19, 2000 6:54 PM
Subject: Re: Fw: Yamaha problem


> Hi Robert,
>=20
>     Well, I guess I finally figured out how to get your messages. They
> still keep coming up blank on my school computer but today, I
> forwarded a blank one to my home computer and I "think" this is
> it. Right? This one came through fine at home.
>     Thanks for the post(s). I still don't know what the root problem
> was/is but I went ahead and did a damper wire bending job (I was
> very frustrated) and "so far", everything seems to be fine.
>     I tend to think that something Newton posted is probably the real
> problem, a bent hanger. But since everything is working fine now,
> and I can always go back and correct any problems, I think I'll just
> leave everything alone for now. (One of the advantages of the type of
> job I have.) :-)
>     Thanks again for your effort in posting me in spite of the =
problems.
> I still don't know what's causing them.
>=20
> Regards,
> Avery
>=20
> At 10:27 PM 09/17/00 -0600, you wrote:
> >
> >----- Original Message -----
> >From: <mailto:moffattr@cadvision.com>Robert Moffatt
> >To: <mailto:caut@ptg.org>caut@ptg.org ; <mailto:atodd@UH.EDU>Avery =
Todd
> >Sent: Saturday, September 16, 2000 2:11 PM
> >Subject: Re: Yamaha problem
> >
> >Avery,
> >
> >Not a bother at all.
> >It has been mentioned that metal fatigue in the bushing clips could =
be the=20
> >problem.
> >Highly unlikely, but not to be ruled out. Rebushing the lift rail =
guide=20
> >bushings will eliminate
> >any squeaks, groans etc. At the same time , polishing the lift rod =
will=20
> >certainly help in this
> >area as well, but has nothing to do with uneven damper lift. It has =
also=20
> >been mentioned
> >that movement in the action rail due to a "flattened rubber foot" ( =
it's=20
> >called an upright
> >action cap ) could correct the problem...no. The action cap serves =
only to=20
> >straighten the
> >intentional bend in the rail when the action is securely in place. If =

> >there is as much uneven
> >lift as you indicate, the action rail has been bent. Straightening =
the=20
> >rail should be the remedy.
> >Replacing the rail a sure cure. There are, as in all piano work, a =
lot of=20
> >grey areas surrounding
> >this particular problem. With this fix I'm assuming the piano has not =
been=20
> >tampered with. Probably
> >dropped or fallen over.... the usual cause in my experience.
> >If you discover any other peculiarities...don't hesitate to write.
> >
> >Best wishes,
> >
> >Bob Moffatt
> >Yamaha Authorised
> >Factory Trained Technician
> >
> >----- Original Message -----
> >From: Avery Todd <<mailto:atodd@UH.EDU>atodd@UH.EDU>
> >To: Robert Moffatt =
<<mailto:moffattr@cadvision.com>moffattr@cadvision.com>
> >Sent: Saturday, September 16, 2000 7:47 AM
> >Subject: Re: Yamaha problem
> >
> > > Robert,
> > >
> > >    Would you mind resending your message, if possible?
> > > For some reason, it came through blank. I have that happen
> > > here at school sometimes but still don't know why. Sorry
> > > for the bother.
>=20
>=20

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