JD wrote: <The hammers I get from Abel are <not concave at the top as they used to be and I think they face them <up at the factory after cutting, which I am glad of. Greetings, I attended roger Jolly's voicing class at MARC. He spoke about "cupped" shape hammers and how the cupping occurs as a result of the cutter which cuts the whole hammer "brick"< (don't know if thats the right term) into 88 hammers. As I understand him, the cupping is an indicator that each individual hammer has less stress/tension at its sides actually because the cutting relieves the stress when they go into 88 separate pieces, thereby the sides have less stress and the center has more. I understand this is what produces the cup . He further suggests a single needle penetrated all the way to the core, directly along the center line of the hammer, 2 stitches or so, back around the way lower shoulder, say 3 and 4 o'clock, to reduce the stress which allviates the cup. (Roger if you see this, correct me if my understanding of this is flawed) If the cup is removed by "facing them up" at the factory, doesn't this mask the reality that there is still the inner, tension through the center and the sides have less tension? Wouldn't it "disguise" the hammer as not needing "cup relief" needling, when it really does? Julia Reading, PA -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100723/82bcc071/attachment.htm>
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