Front Rail Punching Interference

[Avery Todd]

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Just wondering, but did "they" also install those new hammers on old=20
shanks/knuckles? :-)

Avery

At 03:56 PM 11/13/04, you wrote:
>I think I found part of the problem already. The tooner before me "rebuilt=
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>the piano" - you know, the full monty - new strings, hammers, damper felts=
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>(yes indeed, hanging way out past the damper heads) and keytops  - none of=
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>which were installed straight/aligned, etc. I imagine this thing had ivory=
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>keytops originally. The new keytops are thick plastic (~2mm), and yup, you=
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>guessed it, he didn't plane the keytops down to compensate for the thicker=
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>keytops - so now I have keys that are one or two millimeters thicker than=
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>original.....
>
>Oh well, back to the drawing board ........ er, a, regulating table......
>
>Terry Farrell
>----- Original Message -----
>From: <mailto:antares@euronet.nl>antares
>To: <mailto:pianotech@ptg.org>Pianotech
>Sent: Saturday, November 13, 2004 4:04 PM
>Subject: Re: Front Rail Punching Interference
>
>Terry,
>
>First of all, you need to know the exact key height of your key board.
>This is the key to your regulation.
>For instance.... the key height for Steinway model S-B (measured from the=
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>key bed to the underside of the key top covering) is 63 mm.
>For Yamaha's this 64 mm.
>It is the only way to get your basis straight.
>After that, we're talking.
>
>Andr=E9 Oorebeek
>
>On 13-nov-04, at 20:47, Farrell wrote:
>
><?fontfamily><?param Arial><?smaller>Help!<?/smaller><?/fontfamily>
>
><?fontfamily><?param Arial><?smaller>I'm trying to regulate a Baldwin=20
>"Monarch" microgrand action. I haven't looked up the piano's age (can't=20
>find my Pierce Atlas), but it is from the first half of the 20th Century.=
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>I've run into this before. I level keys (1/2" sharp height), regulate=20
>blow, let-off, etc., and then go to set aftertouch. When I have the proper=
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>aftertouch on the sharps, the adjacent naturals hit the sharp front rail=20
>punching before they hit their own front rail punching when depressing the=
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>natural.<?/smaller><?/fontfamily>
>
><?fontfamily><?param Arial><?smaller>That's bad.<?/smaller><?/fontfamily>
>
><?fontfamily><?param Arial><?smaller>What gives? Have I done something=20
>stupid? Have I simply overlooked something?<?/smaller><?/fontfamily>
>
><?fontfamily><?param Arial><?smaller>Another thing - I have to reduce blow=
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>to 1-3/4 inches to provide sufficient key travel (about 3/8 inches - way=20
>less than spec) to allow let-off and a tad of aftertouch. I replaced the=20
>back rail felt with original thickness (which is the thinnest sold by the=
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>supply houses), I am using the thinnest front rail punchings available,=20
>and I even have key height a little bit higher than they were (and above=20
>spec - more than 2-1/2 inches - I'm quite sure I'm still OK with the=20
>fallboard).<?/smaller><?/fontfamily>
>
><?fontfamily><?param Arial><?smaller>Again, what gives? Action clearly=20
>appears all original.<?/smaller><?/fontfamily>
>
><?fontfamily><?param Arial><?smaller>This is all a lot easier when you=20
>rebuild the action, go through the Stanwood and geometry stuff, and have=20
>it all correct from the get-go! Because, as in this case, it can't be me,=
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>it's gotta be the action! Right?   ;-)<?/smaller><?/fontfamily>
>
><?fontfamily><?param Arial><?smaller>Thanks for anything anyone has to=20
>offer.<?/smaller><?/fontfamily>
>
><?fontfamily><?param Arial><?smaller>Terry Farrell<?/smaller><?/fontfamily>
>
>friendly greetings
>from
>Andr=E9 Oorebeek
>
>"where Music is, no harm can be"

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