David, Terry, I thought about that too for a while. Wouldn't it make sense to simply level at the strike-point and then fit the hammer? You are getting into a lot of factors that are difficult to control. I guess if you shift the action and then have a phase problem, you piano is really out of level. Have you actually encountered this? Andrew At 05:39 AM 9/15/2005, you wrote: >David, while your piano/plate level concept has merit in theory, I'm >not so sure it stands up in the real world. > >You suggest that a tilted plate might occur in cheaper pianos as an >artifact of determining "its correct placement relative to the >bridge for proper downbearing". I would suggest that "correct >placement relative to the bridge for proper downbearing" often >doesn't occur even in many better pianos - let alone cheaper pianos! > >But your point is well taken and a good one. Perhaps Joe's little >string leveler should first be placed on the agraffes themselves. >'Course that assumes the vertical position of the agraffe holes are >on a line parallel to the agraffe top (too big an assumption?). Or >maybe piano level should be determined by the keybed (rear of the >keybed - I guess I would hope it wouldn't make too much difference >where measured on keybed) - that way hammers would be hitting string >plane that is perpendicular to hammer travel. 'Course that assumes >the hammer rail is parallel to keybed. Hmmmmmmm. > >Terry Farrell > >----- Original Message ----- >>Erwinspiano@aol.com wrote: >> >>> To all level headed tech's >>> I have been using Joe's slick little tool for a while now & It >>> has taken the archaic out of the mundane job of string leveling. >>> It tells an accurate story right off the git go. However it's >>> wise to see if the keybed/piano are truly level first & if not >>> get them into compliance. I use a long aluminum bubble level >>> when in shop. In the field a put the gauge on the stretcher or >>> keybed as quick references. >> >> But even if the stretcher and keybed are level, isn't it >> possible that in some pianos, the whole plate could be mounted in >> the piano with a slight tilt, depending on how they determined its >> correct placement relative to the bridge for proper >> downbearing? Maybe this would happen only in cheaper pianos -- I >> don't know, having never checked. But the main thing is that the >> plane of the strings in each agraffe has to be parallel to the >> crowns of the hammers, and if the plate has any tilt to it, you'd >> end up pulling a left unison string up and pushing a right one >> down, or vice versa. --David Nereson, RPT > > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives
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