Repetition Lever Height

[Avery Todd]

Only if you have brand new knuckles! :-)

Avery

>Actually, the best thing IMHO is to develope a good sense of that 0.2mm 
>feel when brushing the finger over the top of the lever/jack window. It 
>might take a bit of practice, but you can get the hang of it after a while.
>
>Cheers
>RicB
>
>Dave Nereson wrote:
>
>>----- Original Message ----- From: "Gordon Holley" 
>><gwholley@hi-techhousing.com>
>>To: "Pianotech" <pianotech@ptg.org>
>>Sent: Monday, July 26, 2004 11:25 AM
>>Subject: Repetition Lever Height
>>
>>
>>List.  In regulating a grand with all new wippens, hammers and shanks, I'm
>>having a problem with determining
>>the correct dimension between the top of the jack and the top of the
>>repetition lever, in setting the repetition lever height.
>>
>>On the back page of the March 2004 Journal, the Yamaha, Little Red
>>Schoolhouse, Step 18 of regulation, says that there should be
>>0.2 mm between the top of the jack and the top of the repetition lever.  And
>>yes, I've read all of the other info provided, but I'm surely not
>>that great at a tactile sensation with a finger to determine 0.2 mm.
>>
>>And I don't know how to measure the 0.2mm with a gauge in the lever window.
>>I read some place that this thickness is about the same
>>as a business card, but that doesn't help.
>>
>>Does anyone have a better, step-by-step procedure to follow to set the lever
>>height?
>>
>>Many thanks in advance
>>
>>Gordon Holley
>>Associate Member
>>Chapter 467, Indiana
>>Goshen, IN
>>
>>    Yes, initially set the edge of the repetition lever window so that it's
>>just barely above the top of the jack.  With the tip of your finger, brush
>>it across the top of the jack and repetition lever and adjust it so that you
>>just barely feel the edge of the rep. lever above the tip of the jack.  (Put
>>a piece of paper down on the desk, and feel the edge of the paper above the
>>desk surface -- something like that).  To increase the "edge" or "lip" or
>>"gap", turn the adjusting button counter-clockwise; to decrease it, turn
>>clockwise.
>>     That'll get you close.  Then, with all the hammers in rest position
>>(sitting on the wippens), take your finger and flick the tail of the jack
>>(under the let-off button) and let go.  The hammer should dip, or "wink",
>>slightly and come back up.  The dip is usually about 1/16" or even less,
>>sometimes more -- I'd say an eighth is on the big side.  If the hammer
>>doesn't dip at all, turn the screw on the adjusting button clockwise until
>>it does.  If it dips quite a bit and stays down, that's too far -- turn it
>>counter-clockwise until it dips but comes back up.  Rather than trying to
>>get an exact hammer dip amount, try to get them all consistent with each
>>other.  It will vary with knuckle wear.  You can also lift neighboring
>>hammers to observe the jack and see that it's getting all the way back under
>>the knuckle, with the back edge of the jack in line with the back edge of
>>the wood knuckle core.
>>    --David Nereson, RPT
>>
>>
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>>
>
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