In addition to the possibility that the keypins "may be nicked/rusty/tarnished," check to ensure that the front rail pins are not turned. Viewed from above, theirs is an oval shape that should be oriented 12:00/6:00.
Alan
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Alan Eder, RPT
Herb Alpert School of Music
California Institute of the Arts
Valencia, CA
661.904.6483
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Original Message:
Sent: 09-28-2021 19:47
From: James Kelly
Subject: Key regulation
I would suggest removing the keys and checking the condition of the key pins and key bushings. The key pins may be nicked/rusty/tarnished and the bushings may be old/worn/frayed. Cleaning and polishing the keypins may help but it is very possible the keys need to be eased at the balance pin hole and the mortises at the front key pin. Key easing needs to be done with the proper tool(s) and technique else there is danger of overdoing it causing a loose key fit causing noise, loss of power and poor touch and control
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James Kelly
Owner- Fur Elise Piano Service
Pawleys Island SC
843-325-4357
Original Message:
Sent: 09-28-2021 18:33
From: Donald Mannino
Subject: Key regulation
Shawn,
Grand piano keys are individually weighted to balance the weight of the upper action / hammers. If you look at the locations of the lead weights in the keys, they probably correspond to which keys are staying up, and which are going down when you removed the upper action.
Whether the weights were installed correctly for an even touch is not at all a sure thing. But having keys that are unevenly weighted is not at all unusual. For now, I would suggest that you just work with the regulation of the action and learn about that. Later you can consider whether the piano needs re-weighting. If this topic gets going here, it tends to get very complicated and highly opinionated.
Another thought is that the key friction is not even, in that some keys might just not be moving freely enough. We can't tell this because these are static photos. If you move the keys, are they free enough to go back to the positions shown? Or do they stay up or down depending where you move them? If they settle back to the up or down positions shown, then it is the weighting. If they stay wherever you move them to, it is the friction.
Don Mannino RPT
Original Message:
Sent: 9/28/2021 12:41:00 AM
From: Shawn Tang
Subject: Key regulation
Hi all,
I am a beginner of the piano regulation. I tried to regulated my own grand piano these few month. Today I removed these keys from the action. I found that some keys are unbalanced and they have settled down. What's wrong with these keys? How to repair them？ Thank you!
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Shawn Tang
Piano teachnician
Tualatin OR
518-606-0041
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