>From: Stéphane Collin <collin.s@skynet.be> >Reply-To: Pianotech List <pianotech@ptg.org> >To: "Pianotech List" <pianotech@ptg.org> >Subject: Re: HAMMER HANGING JIG, from spurlock >Date: Fri, 20 Jan 2006 09:09:20 +0100 > >Hello all hammers hangers. > >I've used the Spurlock jig, but I found that especially in the top trebble >hammers, if the shoulders are on a perfect straight line, the strike points >are not and vice versa. The Spurlock jig assumes that the piece of felt >where the hammers come from is perfectly tapered to begin with, and stays >so after pressing, which I found was not always the case in the sets I >hung. Also, the straight line in all 88 hammers assumes that the >plate/agraffees/capo arrangement is precise enough to place the resulting >correct strike points in that straight line (sorry for my approximate >english), which I also found not always to be true, especially between the >agraffee section and the capo section. The best striking point is easy to >determine by hearing the sound of the note, and when you place the last >hammer in agraffee section and the first of the capo section by ear, you >could sometimes notice that they don't line up with the rest. Same at >other sections borderline, at each side of a strut. Of course, hanging the >hammers in different sections at even slightly different distance from >center pin induces geometry discrepancies, but, if not extreme, I found >those easier to deal with than voicing out the transitions between >sections. >So I like setting the first and last hammer in each section at the correct >angle, copied from old hammers, and at the place they sound best, then line >up the hammer moldings in that section with a straight edge put under the >shanks, and eyeball the strike points to be in straight line in that >section, using a glue that doesn't set too quickly so I still can make >slight adjustments when looking at the whole section. >What do you think ? > >Best regards. > >Stéphane Collin. > > >_______________________________________________ >Pianotech list info: https://www.moypiano.com/resources/#archives
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