On Dec 19, 2019, at 1:05 PM, Jon Page via Piano Technicians Guild <
Mail@ConnectedCommunity.org> wrote:
I'm guessing the hammer flange and rep lever are 1~3 g friction and the jack is 5~7 g friction. It should be the other way around.
The way I've always understood repetition (especially deep in the key) is that the jack and the knuckle are in a race to see who gets home first. For repetition, it need to be the jack. So I pin the jack loose and the rep. With the lever tighter (and friction, higher), the rep spring needs to be stronger. Strengthen the string, and if the rep spring is the butterfly type, the jack side of that spring will also be tighter. Win-win.
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William Ballard RPT
WBPS
Saxtons River VT
802-869-9107
"Our lives contain a thousand springs
and dies if one be gone
Strange that a harp of a thousand strings
should keep in tune so long."
...........Dr. Watts, "The Continental Harmony,1774
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Original Message:
Sent: 12-19-2019 13:05
From: Jon Page
Subject: Chinese Baldwin Grand, Action Problems.
I'd be inclined to repin everything. I'm guessing the hammer flange and rep lever are 1~3 g friction and the jack is 5~7 g friction. It should be the other way around. Repin the wippen flange while you're at it. I was chasing bad repetition and cheating jacks on a player grand and didn't succeed until I bit the bullet and repinned...everything; except the back action. Insufficient rep string tension is a result of loose pinning which causes poor repetition and cheating jacks. It's a vicious circle.
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Regards,
Jon Page
mailto:jonpage@pianocapecod.com
http://www.pianocapecod.com
Original Message:
Sent: 12-17-2019 18:33
From: Ed Sutton
Subject: Chinese Baldwin Grand, Action Problems.
A friend in California is having problems with a four-year-old Baldwin grand, model 165. It appears that action centers are beginning to seize, causing irregular repetition, which was not a problem until recently. She is a music teacher and the piano receives regular but not extreme use.
Have others experienced this in Chinese-built Baldwin grands? The grands are made in a different factory than the verticals.
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Ed Sutton
ed440@me.com
(980) 254-7413
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