Backchecking Height

[Stéphane Collin]

Hi Bradley.

Indeed, I find it very difficult to achieve very even backchecking too.  I bend the backcheck wires with my fingers with the action on a bench or on my knees until I am satisfied, but then, when putting the action back into the piano, nothing is that even anymore (why ? due to minute change of shape of the action when bedded in it's real bed ? or due to differences in rebounding force of the hammers against the strings ? who knows ?  I promise that my blows are quite even, because I practice a lot for that.).
So I find myself obliged to do a second pass, with action in the piano, and correcting by eye balling the hammers who check out of line, using the chalk method (making a pass on all the hammers and marking with chalk on their key those who are out of line, then pulling out the action and blindly correcting the offending ones.  Then same again, wiping the marks of those who are right now.  Then again.  Then having a cup of coffee.  Then back to step one.)

I am sure that someone has a better understanding of the problem, and a better solution to solve it.

Regards,

Stéphane Collin.



----- Original Message ----- 
From: "Bradley M. Snook" <bradley@rice.edu>
To: "Pianotech" <pianotech@ptg.org>
Sent: Tuesday, May 27, 2003 8:08 AM
Subject: Backchecking Height


| Does anyone have a method for regulating the height of backchecking so that
| the results are very even?
| 
| Bradley M. Snook
| Graduate Student in Piano Technology (M.Mus)
| Rice University, Shepherd School of Music
| 
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