bedding the keyframe

MBrat70179@AOL.COM MBrat70179@AOL.COM
Wed, 8 May 2002 14:29:32 EDT


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Hi Gerald,

Bedding the keyframe is in fact the contact between the key frame and the 
keybed.  Improper bedding can result in tone loss.  Remember Newtons' law?  
For every action there is an equal and opposite reaction.  The energy you put 
into the action you want to be transferred to the hammer.  If the action is 
improperly bedded, some of the energy is lost.  Instead of key movement 
transferring into hammer movement, you have some energy being absorbed by the 
key frame in the form of "bouncyness." This can result in tone loss.  It also 
doesn't feel that good on your fingers, and you get a lot of "thunks" in the 
action.

I believe most technicians raise the balance rail glides, bed the back rail, 
then the front rail, and lastly, lower the balance rail glides.  This all 
sounds nice and simple, but you didn't ask the question of how this is 
achieved.

My interpretation  

Mike Bratcher

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