---------------------- multipart/alternative attachment Ric, The total keydip between top of keystroke and top of punching is somewhere near 20mm, depending on how hard you push(not enough punching to stop it). Before I inserted cardboard punchings, there was probably a 10mm +/- gap between key and punching when the key was depressed, once again depending on how hard one pushed. It feels really odd. I am beginning to think that there is some structural abnormality--damage from a fall, or unbelievably bad craftsmanship. I probably won't get back there until the new year. My curiosity is getting the better of me. I want to make it right for the customers, who are incredibly gracious and patient. They've only had the piano for a year, and are fortunate to have a trade-up option and a warranty from the store where they purchased it. Thanks for the use of your brain cells, Dave S. In a message dated 12/20/04 11:46:58 PM Pacific Standard Time, Richard.Brekne@grieg.uib.no writes: > Been reading back and forth your replies to posts coming in on this, and > cant help but wonder about this gargantuan amount of air between where you say > the key stops and the front rail punchings. 20 mm is like a huge amount.... > even 10 mm away from the punchings is a ridiculously large amount. I have a > hard time understanding that any of this can be accounted for by the points > suggested so far... not even in combination when it comes to it. > > Assuming you have even 5-6 mm of key travel, a 20 mm gap at the bottom of > this travel means there is over 25 mm of space between the bottom of the key > and front punchings. Or taking your lowest samples of 12 mm gaps... a near > usual amount of key travel (10 mm) means about the same... 22 mm. > > Key height would have to be well over 6-7 mm too high ... which you would > easily be noticed by the bottoms showing way over the top of the key > slip...which you havent noted so I can only assume thats not the case. Conversely... > if you key bottoms are at all below the top of the key slip... then key height > can not be more then a small amount too high.... far to little to account > for your stated problem. > > Off hand something sounds broken... and rather big time. That said, a > couple basics to confirm for next time you check the piano. > > --Just how much key travel are you getting. (should be around 10 mm) > --Just how much distance is there between the bottom of the keys and the > front rail punchings with the keys at rest. (should also be around 10 mm) > --Where are the bottoms of the keys height wise in relation to the top of > the key slip. (should be somewhere around 3 mm below the top of the key slip... > certainly no higher then that) > --Check whether or not the keys are binding... simply remove the action and > see whether or not they can fall or be easily depressed a full 12 mm. > > > Unless something is broken .. about the only thing I can think of that can > account for such a large distance between the key bottoms and the front > punchings with the keys at rest is a combination of somewhat high keys and nearly > nothing for front punching thickness. In which case this is at least to some > degree a separate problem for why you are not getting any aftertouch with > your stated 1 7/8 hammer blow. That, and the bobbling must be caused by some > lack of key travel. > > What could be happening here is that the keys are binding on something, > like the mortise in the balance rail holes, and at some time some tooner tried > to solve the problem of bobbling by removing most of the front punching > thickness and in general mucking up the regulation. But 20 mm at the bottom of key > travel.... shheeeshh... thats hard to imagine. > ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/93/9d/13/53/attachment.htm ---------------------- multipart/alternative attachment--
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