This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Hello all. This is an attempt to get some input from those who (that = means all of you I guess) frequently regulate grand actions. From the = start we have a few hurdles to get over and of these the principal one = is that of terminology. In regulation you get a) the parts which are = being regulated and b) the name given to that part of the regulation = process. Are we at one with the name "striking distance"? which should = be about 1 7/8" Then we have "Set-off" In this part we adjust the = "Set-off Button" until it touches the toe of the "Jack" and causes the = hammer to stop rising and go into the "escapement" mode.This Set-off = happens about 1/16" below the string. Next we have the "Let-off" (I = think that's sometime called "Drop") when the hammer after hitting the = string is allowed to subside another 1/16". Not to be confused with = "Check" when the hammer after hitting the string more forcibly rebounds = into the loving grasp of its check-block. If then, whilst the hammer is = captivated in check you gradually release the key the hammer should = float upwards - not too fast. This we call "Hammer rise".. OK? The point of all this is I went to tune a new Petrof grand the other day = and was amazed by how much this Czechoslovakian manufacturer had = deviated from what I considered the "norm". The results were as follows: Striking height 1 7/8" (OK) Check 13/16" ? Set-off 1/8"!!! Let-off 3/8"!!!! And the hammer-rise test showed that all the hammers came up faster than = you can say knife! Here's the question therefore - What are the correct settings? My Steinway service manual adheres pretty firmly to my first list of = requirements except that the "Let-off" is considered with relationship = to the diameter of the string affected. Oh yes - there's another aspect of regulation. It's vital that the "Key = depth" be correct. Steinway recommend 9.75 on models S - B and 9.75mm on = C & D Reblitz, on the other hand, is a bit more "global" in his approach = giving more latitude.=20 At the end of the day does the piano react as a concert pianist would = expect? Over to you. Michael G (UK) ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/52/d7/c8/50/attachment.htm ---------------------- multipart/alternative attachment--
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