Regulation bench bedding

[Delwin D Fandrich]

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  ----- Original Message -----=20
  From: Richard Brekne=20
  To: Pianotech=20
  Sent: January 19, 2003 2:27 PM
  Subject: Re: Regulation bench bedding


  A bit late on this one for sure, but...=20
  I saw a jig for bench regulating once at Vintage Pianos (I think they =
were called) in the north Seattle area that one of the Fandrich boys put =
together. It was set up if I remember so that you could pretty =
faithfully re-create the key bed and get really good bench regulating =
results.=20

  Maybe Del can say something about this, or even perhaps provide us =
with a picture of said. ??=20



I've used two benches set up for regulating. One was based on a 1-1/2" =
maple slab, thickness-planed a dead flat as I could get it. Cross-grain =
slip-ribs were used across the bottom to keep it flat. The bench I use =
now is based on a maple/alder laminate with a heavy maple rim. The top =
surface has a thick layer of epoxy. The edges were built up about two or =
three mm above the bench surface and epoxy flowed in and leveled out. =
The bottom surface is also epoxy coated. It's flat and stable. Along the =
front edge are Steinway style center-rail keyframe bedding screws on 200 =
mm centers adjustable from the bottom. =20

The action is bedded in the piano and key dip set as accurately as =
possible. The action is transferred to the bench and the bench bedding =
screws are adjusted up to duplicate the keydip specification on the =
bench. Most keyframes will set up this way. Occasionally there is one in =
which the keydip will be shallow on the bench in which case a 1 mm =
veneer is placed under the balance rail.=20

It's not perfect but it's close and I'm past the point of wanting to do =
all my regulating in the piano.

Del


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