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#2077264 - 05/04/13 04:46 PM Longest key piano action? (keyslip to fulcrum distance)
CyberGene Offline
500 Post Club Member

Registered: 04/04/07
Posts: 723
Loc: Sofia, Bulgaria
On the Pianoteq forum I've read something interesting about how important the length between keyslip and fulcrum is. A guy claims that Kawai RM action utilizes shorter key length in this regard compared to Roland action despite former being a long wooden piece and latter being a two fold mechanism with rear arm beneath the front arm.

It seems that the longer the "arm of the lever", the better the control of dynamics is.

So, which digital piano action has the longest "front arm" so to speak?
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Current DP: Kawai ES7
Previous DP-s: Kawai MP6, Kawai CA63, Roland RD-700SX, Roland FP-5, Yamaha P90, Korg SP-200, Casio CDP-100

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#2077267 - 05/04/13 04:55 PM Re: Longest key piano action? (keyslip to fulcrum distance) [Re: CyberGene]
Scott Hamlin Offline
500 Post Club Member

Registered: 08/11/12
Posts: 593
Originally Posted By: CyberGene


So, which digital piano action has the longest "front arm" so to speak?


cool
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#2077271 - 05/04/13 05:03 PM Re: Longest key piano action? (keyslip to fulcrum distance) [Re: CyberGene]
CyberGene Offline
500 Post Club Member

Registered: 04/04/07
Posts: 723
Loc: Sofia, Bulgaria
laugh

OK, I may have found the answer on the Kawai US site:

Quote:
The new Grand Feel (GF) is Kawai latest digital piano action. Building upon the design principles established in the RM3, the GF action increases the length of the wooden keys beyond that of the RM3 and moves the balance point back to create the longest key-front pivot length in the industry – as long as a Kawai grand piano’s pivot length. This improvement creates a more evenly balanced key touch weight from front to back, making it much easier to play near the back of the keys during complex musical passages. Finally, triple sensor key detection is added to the GF action to improve performance and control.




For comparison, here's the RM3 picture where the pivot length is obviously shorter:


It would be interesting to know if the claim is true and compare this to other digital piano actions, especially the standard one with twofold mechanism. I like the cheaper RH action in my MP6 more than the wooden single-piece RM3 action in my ex-CA63 and the explanation could be the pivot length indeed.
_________________________
http://www.myspace.com/evgenykumanov
Current DP: Kawai ES7
Previous DP-s: Kawai MP6, Kawai CA63, Roland RD-700SX, Roland FP-5, Yamaha P90, Korg SP-200, Casio CDP-100

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#2077276 - 05/04/13 05:13 PM Re: Longest key piano action? (keyslip to fulcrum distance) [Re: CyberGene]
kapelli Offline
Full Member

Registered: 11/26/12
Posts: 407
Loc: Poland
Would be good to put here also the PHAIII and GH3/NW actions.

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#2077333 - 05/04/13 06:59 PM Re: Longest key piano action? (keyslip to fulcrum distance) [Re: CyberGene]
Kawai James Offline
9000 Post Club Member

Registered: 09/06/07
Posts: 9679
Loc: Hamamatsu, Japan
Yes, the Kawai 'Grand Feel' action currently offers the longest pivot length of any digital piano (with the possible exception of the Yamaha AvantGrand).

You may be interested to read hpeterh's interesting thread discussing digital piano action measurements at the link below, although bear in mind that's a few years out of date now:

http://www.pianoworld.com/forum/ubbthreads.php/topics/1545456

Cheers,
James
x
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#2077348 - 05/04/13 07:20 PM Re: Longest key piano action? (keyslip to fulcrum distance) [Re: CyberGene]
CyberGene Offline
500 Post Club Member

Registered: 04/04/07
Posts: 723
Loc: Sofia, Bulgaria
James, I've missed that thread somehow and it is exactly what I was searching for. Thank you!

It seems AvantGrand is better than a regular digital piano action but not with much and is actually much closer to a digital than to a huge concert grand.
_________________________
http://www.myspace.com/evgenykumanov
Current DP: Kawai ES7
Previous DP-s: Kawai MP6, Kawai CA63, Roland RD-700SX, Roland FP-5, Yamaha P90, Korg SP-200, Casio CDP-100

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#2077593 - 05/05/13 10:57 AM Re: Longest key piano action? (keyslip to fulcrum distance) [Re: kapelli]
dewster Offline
4000 Post Club Member

Registered: 12/07/09
Posts: 4364
Loc: Northern NJ
Originally Posted By: kapelli
Would be good to put here also the PHAIII and GH3/NW actions.

I measured the PHAIII over on the Nekid Pichures thread: 220 mm keyslip to pivot.
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