I posted the statement "drop affects nothing". I was quoting Rick Baldassin from the class "Are you Regulationally Challenged" from GR this summer. I will not stick my proverbial neck out to be chopped off here as perhaps if Mr. Baldassin monitors these posts he might explain what he meant. I think Mr. Baldassin meant affect with an "a" not effect. Affect means to have an influence on or effect a change in something. In the class I thought he was referring to drop in any amount will not change any other regulation setting. For example drop does not a-ffect hammer blow distance. In the class we were trying to diagnose problems in faulty regulation models. As thoughts and suggested answers were being thrown out some were trying to give drop as an answer to certain problems (me too I think?) and the statement was made. The class was great and fun. I encourage anyone to take it and benefit from it's e-ffect. I guess I stuck my neck out anyway but will bow to any reply Mr. Baldassin might give. Steven Hopp Midland, TX > Date: Thu, 26 Nov 2009 08:30:48 +0100 > From: ricb at pianostemmer.no > To: pianotech at ptg.org > Subject: Re: [pianotech] Regulating drop > > I read in one of these posts that someone was under the impression that > "drop effects nothing". I would suggest this is rather misunderstood. > Drop is a necessary component to after-touch for one thing. And if it > wasn't there the hammer would end up going past let-off height when the > key is depressed fully. You can easily enough accomplish this yourself > by simply removing the let-off screw. With a close enough let-off and > enough extra key movement after that point you end up quickly with the > hammers on the strings after escapement. > > The whippen has to hold the hammer firmly up... enough to avoid checking > on a soft blow, enough to lift the hammer firmly upon release of the > key.. or if you like push the hammer and the key in opposite directions > in strong enough fashion to facilitate repetition. So it has to have a > stop mechanism to avoid pushing the hammers into the strings after > let-off. The drop screw does this but creates a touch component of its > own in the doing. Common practice has it that the drop screw and the > let-off button engage simultaneously (or very very nearly so) because > this evidently feels best to most pianists... that firm <bump> through > let-off at the bottom of key motion. If both are regulated to engage > simultaneously... and there is not too much after-touch key motion... > then what Ed mentions is the result. The hammer will end up virtually > at let-off height when the key is very firmly depressed at the bottom of > key dip. > > I routinely run into regulation where some tech has regulated with way > too much drop... this just slows every thing down and yields a rather > squishy feeling to after-touch as the rep-lever has to engage far to > early relative to the jack. Drop effects quite a bit actually. Paul is > on to it here. > > Cheers > RicB > > > If no-one else has said this, and I haven't seen it yet, my > understanding of the purpose of drop, other than the secondary > result of having a visible let-off, is to "upstop" the repetition > lever at the highest possible moment of rotation of the whippen and > just before the sprung leverage rotates in the opposite direction > so that the jack is allowed to return more efficiently under the > knuckle. The more drop, a greater compression of the spring, a > larger "bounce" of the knuckle on the rep lever, the less efficient > return of the jack, and the slower the repetition. > > Paul > > _________________________________________________________________ Bing brings you maps, menus, and reviews organized in one place. http://www.bing.com/search?q=restaurants&form=MFESRP&publ=WLHMTAG&crea=TEXT_MFESRP_Local_MapsMenu_Resturants_1x1 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20091126/76975b09/attachment.htm>
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