Double Striking Hammers

[Michael Jorgensen]

Hi Avery,
    I've had the same thing and found that alittle bit tighter
centerpining helps reduce this. (Assuming the action is otherwise well
regulated)
-Mike Jorgensen

Avery Todd wrote:
> 
> List,
> 
>    I'm having a minor problem on one of our 'D's with hammers that sometime
> double strike a little on very soft blows. The key(s) are being played all
> the way down but the hammers don't go into check on that soft a blow. So
> some bounce back up enough to sometimes "bubble" very softly.
>    It's happened before on another piano but I've always been able to change
> a little here, a little there, and manage to stop it. However, I've never
> really understood why it happens or what regulation adjustment would be
> *most* likely to stop it. Or is it a combination of things: like rep spring
> too strong, drop too little or too much? Dip? Something else? Comments?
>    Thanks.
> 
> Avery