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 >> >> >>_______________________________________________ >>pianotech list info: https://www.moypiano.com/resources/#archives >> >> > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives
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