jig for Twisted-Key keytops

[David Ilvedson]

If the key is twisted I can't see any reason why the top and bottom surfaces
would still be parallel to the same plane.

David I.

-----Original Message-----
From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]On Behalf
Of Farrell
Sent: Thursday, March 16, 2000 4:03 AM
To: pianotech@ptg.org
Subject: Re: jig for Twisted-Key keytops


Hmmmm, RU saying that the bottom of the key is not does not lie in a plane
parallel to that of the keytop? Even if the key were twisted, the bottom and
top would still be parallel in any given area. Please explain, I must be
missing something.

Terry Farrell
Piano Tuning & Service
Tampa, Florida
mfarrel2@tampabay.rr.com

----- Original Message -----
From: "Paul McCloud" <smccloud@ix.netcom.com>
To: <pianotech@ptg.org>
Sent: Thursday, March 16, 2000 12:59 AM
Subject: Re: jig for keytops


> I have this planer also, and have used it with my own version of a key
> jig.  The photo shows a very large radial press, which is much bigger
> than our table top drill press.  I used a vise from Sears which has a
> special handle to tighten the jaws.  I used this to hold the key while
> planing the top.  I mounted a piece of flat ply on the press table, and
> slide the key under the planer in the vise.
>     My problem has been that the keys often have some twist in them, so
> the bottom of the key isn't flat, and the top gets planed at an angle,
> and the keyfronts lay at an angle.  YIKES!.  What I would like to see is
> some way of using the original keytop to set the planing surface on the
> machine.  What I would envision is sort of like using a jointer (key
> upside down).  The original plane of the keytop is the best reference to
> use, since it doesn't rely on the other surfaces of the key.  Any ideas?
>
>     Paul McCloud
>
>