[pianotech] Fwd: Sluggish key diagnosis

Qshooterq at aol.com Qshooterq at aol.com
Sat Aug 7 10:52:51 MDT 2010


In a message dated 8/6/10 10:13:51 PM, Qshooterq at aol.com writes:

> 
> In a message dated 8/6/10 10:04:32 AM, pmc033 at earthlink.net writes:
> 
>  
> Can you tell me what indicates a sluggish key to you and what steps do you 
> take to isolate where the problem is (front rail pin bushing, balance rail 
> pin bushing, balance rail pin hole, etc)
>  
> 
> In checking for tightness at the front rail pin - first hold the key at 
> the center rail and pull to the side. 
> This freezes the key against the balance rail pin  and takes the balance 
> rail out of the equation.  Then with the key in down position you can move 
> the key from side to side to feel for front tightness.  You must feel a very 
> small "bump."  Without the bump the key will be prone to being too tight 
> when the humidity goes up.
> 
> Personally, I prefer to do the front rail first.  It doesn't matter if the 
> balance rail is loose or tight at this point.         ---Tom Gorley
> 
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