>> I do not have confidence in my touch while playing chromatic scales to judge ppp playing evenness. Sometimes a key will not hit the string and it is not consistent, it will vary across the piano so I blame my lack of even touch. I used Spurlock gram weights, set on key ends (like when measuring down weight) and let it free fall in a controlled manner, adding or taking away weight to zero in on a number that could mean something, like how many grams to get the hammer to contact the string. Suprised to find discrepancies of up to 6 grams and the discrepancies stay about the same with or without the sustain pedal. Any opinions here - am I splitting hairs? Does the above sound like a valid test? Also, I am a bit puzzled about how to account for the discrepancies. As all pinning and key frictions are very close, it could only be a mass thing? << Greetings, If you are measuring what it takes to touch the string, you will have to go through let-off. If you are comparing the weight needed to put the action through escapement, you will need to know that the jack/knuckle relationship is the exact same from key to key. It may be difficult to measure the friction of the jack escaping, but that could be a big source of your inconsistency. Regards, Ed Foote RPT -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100125/d9d8066b/attachment.htm>
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