Slow Console Action

[Don]

Hi Terry,

Make a simple "pivot" and rest the key at the balance rail on it. That will
"tell the tale".

At 08:38 AM 4/6/2003 -0400, you wrote:
>I am convinced this particular piano had a weight problem. I tried turning
several capstans down to increase lost motion - the backs of the keys just
rise and still do not allow the jack to return under the butt. I have
little doubt some little jiffy weights would help.
>
>Terry Farrell
>  
>----- Original Message ----- 
>From: "Dave Nereson" <dnereson@dim.com>
>To: "Pianotech" <pianotech@ptg.org>
>Sent: Friday, April 04, 2003 4:25 AM
>Subject: Re: Slow Console Action
>
>
>
>  ----- Original Message ----- 
>  From: Farrell 
>  To: pianotech@ptg.org 
>  Sent: Wednesday, April 02, 2003 3:06 PM
>  Subject: Slow Console Action
>
>
>  Not really slow, but rather when you lift your finger up off a key
slowly, the jack will not slide under the hammer butt. I believe this to be
a somewhat common problem on these little pianos. This one is a 1960ish
Kohler & Campbell console. Clearly, the key is front weighted enough that
the wippen is not able to return the key to resting position fully and thus
let the jack slip under the butt. I lubed the action liberally with Protek
and eased all the keys - got everything as loose as I reasonably could -
the jacks still get stuck when lifting off the note slowly.
>
>  I suppose the jack springs could be a bit on the weak side. On a well
designed and manufactured vertical piano in good condition, should the
weight of the wippen be sufficient to push the rear of the key down to rest
on the backrail felt? I should think so.
>
>  Have I missed anything? Any recommendations?
>    
>  Terry Farrell
>  _______________________________________________
>  pianotech list info: https://www.moypiano.com/resources/#archives
>
>      There are some verticals that require more lost motion than we
normally consider acceptable.  This is usually because the curve of the
butt leather is not correct to allow the jack to get all the way back under
unless the blow distance is set too short, or at least shortER.   I used to
run into several brands where I'd say, "Oh, man, there's too much lost
motion -- gotta regulate these capstans."  Which I would do, then find out
I had to turn them all back down because the jacks wouldn't return.
>      Reasons keys won't return all the way have been mentioned in other
replies -- mainly "cupped" key button bushings or fronts of keys that are
too heavy.  There are many little pianos where occasionally you have to add
a weight right behind the key button just to help the wippen get that key
all the way back up.  Wood dries, absorbs, loses moisture, weights and
friction change.  Might've been OK at the factory, but now, 40 years later,
.....
>      --David Nereson, RPT, Denver  
>  `
>
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives
>
>

Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.

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