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Joined: Jan 2009
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Would a pro technician set blow distance differently for the bass compared to the rest, or is this an unacceptable practice for you pros?
At the first shop I worked at, we routinely set preliminary blow to 44mm in the treble and 47mm in the bass, so yes. Finally!  May I know the reason for this? Am so interested in the answer but I may not be able to check the forum for a while. I'm on internet access in my office which has electricity but will be driving home shortly where we do not have power due to the typhoon. I've never given it much thought, and never bothered to ask, but I suppose the answer is due to the fact that we increased let-off to 3mm for the bass hammers, which is a safety factor for the bass strings. Increasing let-off distance also increases after-touch, which can be compensated for by increasing blow distance, which decreases after-touch.
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Joined: Jul 2008
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Joined: Mar 2008
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If they did that it was to have more powerful and heavier basses, so the pianos can be sell easier but the let off difference is not a good justification, to me.
Letoff is measured and regulated without the piano actually playing ; when you play the letoff distance varies. Hammer travel is sometime reduced to help the touch when the tech don't know/cannot regulate properly and the action is heavy, or misconceived..
But if the hammers are intended for that and bored shorter in basses then the travel can be larger in basses.
Some Erard grands of the 1900 era had more hammer travel distance in basses , a large 55 and even 60 mm with the rest 50 mm, to have more power.
Rest position is better similar all along the piano in my opinion indeed after-touch can be larger in the basses somehow. When playing it will be similar to higher due to more shank flex. more often I will have more key dip in the basses than having a longer travel distance there.
Last edited by Kamin; 12/04/12 07:03 AM.
Professional of the profession.
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I wish to add some kind and sensitive phrase but nothing comes to mind.!
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Dble
Last edited by Kamin; 12/04/12 06:10 AM.
Professional of the profession.
Foo Foo specialist
I wish to add some kind and sensitive phrase but nothing comes to mind.!
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Joined: Mar 2008
Posts: 9,230
9000 Post Club Member
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Not 40 mm travel but if the pianist is happy with the touch why bother.
The problems may arise after having played enough an action out of regulation With jack buried in cushion this happen, but if not the piano is only not ideally regulated ; if the specs are 45 mm for 10 mm dip it turns out to be 40 and 9 mm also (+-)
Last edited by Kamin; 12/04/12 06:53 AM.
Professional of the profession.
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I wish to add some kind and sensitive phrase but nothing comes to mind.!
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Posts: 4,331
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Rest position is better similar all along the piano in my opinion indeed aftertouch can be larger in the basses somehow. When playing it will be similar to higher, but due to more shank flex Question answered before it was asked. Feel beats regulation by numbers!
Ian Russell
Schiedmayer & Soehne, 1925 Model 14, 140cm
Ibach, 1905 F-IV, 235cm
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