Thanks muchly for this posting...will read it through a couple more times before digesting it all. In the meantime a couple points stuck out and I wanted to get your thoughts on those. Overs Pianos wrote: > Bill Ballard touched on the influence of the jack/roller relationship > to the line-of-centres in his recent post. His was an excellent > point. The location of the jack/roller contact for many actions, is > very poorly laid out. Yet there are seemingly two somewhat opposing friction concerns here... the roller sliding on the repetition lever... vs the rollers contact situation with the jack. I agree Bills point was a good one in as much as it addressed the unobtainability of this line of centers / knuckle consideration. > While it is important to have the capstan/heel > contact pass through the line-of-centres at half key dip, the > jack/roller contact position is of equal importance. This is another point discussed a bit lately... and none of those who seem active in action design parameters who have written about this lately have seemed to see the importance of this.. I frankly do not see how this ends up being an important point (tho I strive to adhere to it) I would love to hear some explanation as too what exactly makes this half-key dip / line of centers / whippen cushion-capstan contact point so essential. care to expound ?? > I find it > incredible that almost all piano action designers over the past > century have failed to grasp this. > > Ron Overs > -- > > _________________________ > > Website: http://www.overspianos.com.au > Email: ron@overspianos.com.au > _________________________ -- Richard Brekne RPT, N.P.T.F. Bergen, Norway
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