[CAUT] Touchweight question

[Jim Busby]

David,

SW go from 10.0 (#1). to 4.0 (#88) in a smooth curve.

I will adjust and use the springs the way you suggest. Seems a waste not to use them!

Thanks.

Jim

-----Original Message-----
From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of David C. Stanwood
Sent: Friday, September 26, 2008 5:02 AM
To: caut at ptg.org
Subject: Re: [CAUT] Touchweight question

Jim,

Two questions:

How many springs..... 88?

What is the SW level?

If it was me and I had springs I would use them as described.... to support the weight of the wippen.

David Stanwood

>Thanks David, Fred, Ric, others,

>Yes, David, Danish it is. I will take measurements as you have suggested. I've already done some samples with a "normal" key leading ?>pattern (w/o springs) and it works very "normal". I can't see why they did it the way they did. Now, with the Front Weight and Strike >Weight in the "normal" range (SW needed no change, keys lots) I get very typical "good" DW and UW measurements (35-37 BW). That being >said, if I do take advantage of the springs and eliminate some lead in the keys and let the spring do minimal work, as you suggested >below, would that be "better" than with no spring at all? There is such a range here; from the original "make the springs do all the >work" to no springs at all, and everything in between. Hence the query.

>My limited understanding of the spring is that "if it is needed, then use it." And that seems to be for a larger piano, larger keys, >etc. or if heavy hammers are used. If not, then why use them? I may then go to your "Cut 'em off" comment below.

>BTW, the action ratio is 5.8. The spread is 113.5, so that doesn't seem to be the place. I thought about moving capstans.

>There is so much to learn here! The bottom line, of course, is to make a piano feel great to the pianist. John Silverman's adviced to me >a few months ago was "Don't try and make all pianos exactly the same! Vive le deference' (sp?) This project is almost a classroom to me.

>Thanks for your help!

>Regards,
>Jim Busby