[pianotech] was curve now glide

Sat Oct 16 05:31:26 MDT 2010

David, it's neither contrarian nor wrong to bed the frame with the keys on, in fact, that's the way I do it in the field or when prepping a piano for sale. The only time I bed the frame with the stack and no keys is when I have a piano in my shop and I'm doing a regulating.

Al - 
High Point, NC

  From: David Love 
  Sent: Saturday, October 16, 2010 1:08 AM
  To: pianotech at ptg.org 
  Subject: Re: [pianotech] was curve now glide

  It’s contrarian in that the others were advocating bedding the keyframe with keys and stack removed.  I see no particular advantage in doing it that way and in the field it’s not practical.  I suppose you should check the una corda bedding but if it’s different what do you do?  I would opt for the bedding with the key set in the rest position.  

  David Love

  www.davidlovepianos.com

  From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of PAULREVENKOJONES at aol.com
  Sent: Friday, October 15, 2010 9:51 PM
  To: pianotech at ptg.org
  Subject: Re: [pianotech] was curve now glide

  David:

  This isn't contrarian. It's just the same procedure with the entire assembly together. 

  The advantage of achieving positive contact with the keys off, then loading them on after, is to insure that the flex of the keybed with pedal use doesn't "unbed" the center even by the slightest. 

  No-one has addressed shift-bedding (una corda). There can be very slight variations across the surface of the bed where the glide contacts it, and it is wise to check the una corda position bedding as well. Minor detail.

  P

  In a message dated 10/15/2010 7:58:51 P.M. Central Daylight Time, pianoboutique at comcast.net writes:

    Not to be a contrarian but I bed keyframes with everything together.  The technique I use was presented by Steinway’s John Patton at one of the conventions.   Can be done in a couple of minutes or less on a Steinway.  Pianos that have glides that are buried underneath the keys require at least the removal of the covering keys naturally.  The process is simple and requires you to just back off the glides enough to be sure that none are touching the keybed which you can test be pressing down on the glide bolt with a wrench (or a screw driver if it’s a screw type) using the back of your hand against the pinblock as leverage.  You will be able to see the keys flex downward when there is a space there.  When they all produce a bit of flex then start in the center and turn each bolt down until there is no flex, backing it off just slightly in order to produce that telltale knock and then just setting the bolt down to eliminate the knock/flex.  Go alternately outward until all are bedded.  Then go back to the center and make sure you haven’t “unbedded” the center glides by turning the outer bolts down too far.  If you have then start over.  It requires a bit of touch and sensitivity but it can be done quickly and accurately with some practice.  
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