>Wow! Doesn't that mean practically no aftertouch? > >I try to set the jack so at full dip it's in the middle of the rep window. Hello Cy, Not really. There is quite some variation between the amount of after touch which technicians shoot for. In general, I don't like to see too much clearance between the jack and the knuckle when the hammer is in check. But it is important that there is some clearance. For domestic pianos which don't see a technician too often it is better to allow for a little more clearance than for a concert or performance instrument which might have the reg touched up every couple of months or so. For faster repetition, less clearance is required between the jack and the knuckle at the check position. Clearly, if a domestic instrument is set too fine, there is a risk that the blow distance will widen between service intervals such that the knuckle clearance might reduce to zero, which might cause blubbering at let-off during soft playing. I would also say that if the cushion touches the jack before it clears the knuckle then the felt needs to be trimmed to reduce its thickness or replaced. With our own grand piano action, we've found that the small variability which occurs between production batches can result in the jack stop felt being too thick or too thin, depending on the setup of the machines during manufacture. There shouldn't be any difference from batch to batch, but in practice its hard to control. Very often we will change the jack stop felt to achieve the clearance we're looking for. Its an interesting area of piano work, this setting up of actions. There's always something more that we learn as we live for longer. Ron O. -- OVERS PIANOS - SYDNEY Grand Piano Manufacturers _______________________ Web http://overspianos.com.au mailto:ron at overspianos.com.au _______________________
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