[pianotech] Fwd: Erwins key dip gauge

[Al Guecia/AlliedPianoCraft]

Ric, I couldn't agree more. Proper key height is the "key" the gain entrance 
to proper regulating. I have seen so many regulatings compromised because of 
improper key height.

When I was a regulator at Steinway, they insisted on the proper backrail 
felt & key height. That is the reason they glue the back rail felt on one 
side only. To be able to adjust the backrail felt height also. Set the 
proper key height for each action and all other adjustment fall into place.

Al



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From: "Richard Brekne" <ricb at pianostemmer.no>
Sent: Friday, February 27, 2009 8:22 PM
To: <pianotech at ptg.org>
Subject: Re: [pianotech] Fwd: Erwins key dip  gauge

> Excellent point Dale. And one grossly overlooked in most action work. 
> Boils down to a few other <<starting points>> we generally don't mess with 
> or try to gain an understanding of. Namely how thick does the back rail 
> felt need to be, what that requires in terms of key height at the front of 
> the key, and how this all positions the key itself relative to the 
> whippen.  For eks... does one want the key level at rest or does one want 
> the key to be level at half blow.... and in each case why ? Key travel is 
> really a better concept then key dip IMHO. But then we so often take it as 
> given that the key at rest is in its optimal position or that key height 
> is optimal..... neither of which is necessarily the case. For me... 
> depends on how picky I want to get I suppose... but generally I stick with 
> whats in front of me... level the keys to whats spec if thats available, 
> what looks to put the key level at half blow if specs are not... then as 
> mentioned earlier start with a rough 10 mm dip and proceed as per earlier 
> posts.
>
> I generally do not follow any curvature in string height if thats what you 
> are after..... but I can if its called for and paid for.
>
> Cheers
> RicB
>
>
>    I'm always surprised nobody asks this, but where are you all
>    measruing max keytravel/dip & how? It makes a difference.  I
>    remember Little red school house but I don't want to give it away.
>    Besides not every one measures it the same way.
>    Nice post Andre...Such Passion!
>    Luv it
>    Dale
>
>
>
>