[pianotech] Determining Balance Weight

[Victor Belanger]

Thank you David,

That is a lot of help. I just did not know where to start.
I tried one action with trying to get the BW around the 38 range,  
played with friction and got it in the ballpark but I had the hardest  
time. I knew that there was a better way to go through this.

Victor Belanger

> ------------------------------
>
> Message: 7
> Date: Mon, 17 Aug 2009 07:39:46 -0700
> From: "David Love" <davidlovepianos at comcast.net>
> To: <pianotech at ptg.org>
> Subject: Re: [pianotech] Determining Balance Weight
> Message-ID: <002f01ca1f48$92184190$b648c4b0$@net>
> Content-Type: text/plain;	charset="US-ASCII"
>
> I should add that customer preference will also be a factor.  My  
> general
> range of BW choices is 34 (light) to 42 (heavy).  I don't venture  
> outside
> that range very often unless there is a specific request.
>
> David Love
> www.davidlovepianos.com
>
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org]  
> On Behalf
> Of David Love
> Sent: Monday, August 17, 2009 5:52 AM
> To: pianotech at ptg.org
> Subject: Re: [pianotech] Determining Balance Weight
>
> Only experience will let you know what balance weight to use. My  
> default is
> 37g.  Some go lighter some heavier.  For a given BW the action will  
> yield a
> DW and UW depending on friction.  Weigh off the action DW and UW and  
> you
> will have a chart note by note of the BW for the entire action.   
> Change the
> front weight on each note to alter the BW to make the entire action  
> uniform.
> The change is made at a rate of 1:1. That is add 1 gram to the front  
> weight
> to reduce the BW by 1 gram.  Any change in friction will not alter  
> the BW
> because the DW and UW will change in opposite directions.
>
> That's the reader's digest version anyway.
>
> David Love
> www.davidlovepianos.com
>
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org]  
> On Behalf
> Of Victor Belanger
> Sent: Monday, August 17, 2009 5:23 AM
> To: pianotech at ptg.org
> Subject: [pianotech] Determining Balance Weight
>
> Hello everyone,
>
> I have looked at the archives and cannot find an answer to perhaps a
> naive question but how does one determines which balance weight number
> to use?
> I am in the process of installing hammers and shanks to a Steinway "A"
> action using what I learned in the action touch design class at the
> Convention and am slowwwwly going through it. The whippens are fairly
> new, and will check the Rep. lever pinning on all.
> I understand that when I use a balance weight number, then I can use
> an appropriate DW & UW without varying the BW to some degree.
> Can someone give a basic step procedure to this process?
>
> Thanks.
>
> Victor Belanger
> Belmont, MA
>

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