Warped Action Parts

[Paul]

Cut a saw curf(s) through the offending area(s) and epoxy a wedge in the
curf. Make sure your work surface is the same shape as the key bed.

Paul Chick
----- Original Message -----
From: Farrell <mfarrel2@tampabay.rr.com>
To: <pianotech@ptg.org>
Sent: Tuesday, June 26, 2001 4:21 PM
Subject: Warped Action Parts


> Does anyone have any good tried-and-true methods (or any good guesses) for
> aligning/leveling a keybed, keyframe and stack? I'm trying to do a
> regulation on the Knabe I replaced the keybed in. Keybed is dead flat. I
> have put excellent straight-edges every which way on it and it is very,
very
> flat. My trouble arose when I leveled the keys on a very flat bench with
the
> action clamped down (back action frame rail bows up). Put stack on after
> leveling, put in piano, and keys were way low in middle. Turns out not
only
> is the keyframe warped up, but the hammer and wippen rails are warped
> upwards in the middle also. So when you attach the stack to the keyframe,
it
> pulls up the middle of the keyframe even more.