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#1435681 - 05/13/10 10:13 AM Re: Inside my Kawai CA63 [Re: Andree]
hpeterh Offline
500 Post Club Member

Registered: 01/26/10
Posts: 824
Loc: Germany
Originally Posted By: Andree
Technocube, I would say that every action, available in premium digital pianos, uses gravity to return the hammer. The difference lies in the construction of these actions, here we can see that different manufacturers use different solutions. Mainly one can say that Roland and Yamaha share the same principle, a weight lifted below the key when pressing it down. KAWAI has chosen another technique, a hammer that is thrown away from the key. If you want a good action you should go for KAWAI, Yamaha and Roland have a lot to work on if you ask me.


I believe, it doesnt matter much, if the hammer is above, behind or below the keys.
That doesnt influence the ballistic behaviour.

Once I repaired a Yamaha keyboard with GHE (or was it GHD ?) action and of course this is solely basing on mass inertia and gravity.

But there is one difference to the Kawai:
The yamaha keyboard has the hammer connected to the key with a joint. That means, hammer and key cannot move independently.
If the hammer moves up, the key goes down.

The kawai wooden keyboard is different:
The key has more mass and if you apply a slight stroke to the key, the hammer will "fly" away from the key. There no joint that connects them firmly.

This is -for me- an important difference.
Of course also the hardness or softness of the keybottom and the noise are important. I prefer the Kawai touch. Of course other might differ. It also depends on playing style and habits, if this difference is important.

I dont know, if Yamaha's GH3 works the same way as the GHE/GHD, but I believe it.
_________________________
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#1435779 - 05/13/10 01:04 PM Re: Inside my Kawai CA63 [Re: Kawai James]
Pinipon Offline
Full Member

Registered: 02/21/10
Posts: 68
Loc: Lisbon, Portugal
Originally Posted By: Kawai James
Pinpon, please contact the dealer from where the instrument was purchased, requesting that these issues be fixed.

Kind regards,
James
x


The dealer will come next Monday to my home to see the problem.
I will keep you informed about it.

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#1436018 - 05/13/10 06:34 PM Re: Inside my Kawai CA63 [Re: hpeterh]
mucci Offline
1000 Post Club Member

Registered: 01/29/10
Posts: 1070
Loc: Munich, Germany
Originally Posted By: hpeterh

But there is one difference to the Kawai:
The yamaha keyboard has the hammer connected to the key with a joint. That means, hammer and key cannot move independently.
If the hammer moves up, the key goes down.

The kawai wooden keyboard is different:
The key has more mass and if you apply a slight stroke to the key, the hammer will "fly" away from the key. There no joint that connects them firmly.

This is -for me- an important difference.
Of course also the hardness or softness of the keybottom and the noise are important. I prefer the Kawai touch. Of course other might differ. It also depends on playing style and habits, if this difference is important.


hpeterh, you are referring to an extremely important point here. This is exactly the difference which introduces a very different aaction to the keyboard compared to Roland and Yamaha. For me it's this, along with the extra long keys itself (not so much the wooden keys which is nice but not a must have), that make the difference and leads to this very realistic feeling and the expressiveness of the KAWAI keyboard that I love. There are definitely specific playing styles which I can only perform with the KAWAI keys. For example I love to just slightly touch the keys without a lot of force pressing them completely down, but then the keys can just so easily be pressed down because the hammer is already moving forward independently of the key itself. And you also realize the specific feeling when the hammer is moving back so that you again feel the resistance. I could never achieve this with a Roland or Yamaha keyboard. It greatly supports my ability to e.g. play pp with rapid repetition. It's realistic feedback.


Edited by mucci (05/13/10 06:35 PM)
_________________________
<~ don't test forever - play and enjoy! ~>

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#2257986 - 04/07/14 05:13 AM Re: Inside my Kawai CA63 [Re: AndyT]
Gi Dy Offline
Full Member

Registered: 03/26/13
Posts: 30
Loc: Philippines
Hey AndyT!

Can you post a pic where you can give the measurements?
Such as the distance of the pivot point from the key surface

Nice looking DP you got there!

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