Action Position Adjustment

[Roger Jolly]

Hi Terry,
                 Have the hammers been filed a few times, and are 
they now are over centreing?
If key slip and key board cover all look good with the action,  pop 
the hammers off and hang them back a few mm's.
If hammers are over centreing, ream the holes a little so can tilt 
them back a tad.

I know watch out for some geometry issues =-O

Regards Roger



At 05:23 PM 9/1/2006, you wrote:
>>Older Kawai grand. The piano lacks tone in the top two octaves - 
>>progressively gets worse toward C88. Cearly, C88 is hitting the 
>>string at the capo - clearly the action is too far forward. 
>>However, the key bed has three or four wooden stop blocks screwed 
>>to it that prevent the action from being moved further back (what 
>>are those blocks called?). I have not run into this before. What is 
>>the best fix? Removing, plugging, and redrilling the stop blocks 
>>would be difficult in the cramped quarters of the action cavity. 
>>Should I just carefully plane/cut off a few millimeters from the 
>>rear rail of the action frame and then position with the adjustable 
>>thingees (what are they called?) in the cheek blocks?
>>
>>Seems to me it's one or the other. Any better suggestions? Thanks.
>>
>>Terry Farrell
>
>Terry,
>
>I my first year of piano work, working at Sydney's distributor for 
>Kawai, we regularly moved the action and keyboard assembly back to 
>correct for strike ratio problems in the high treble. Our solution 
>was to plane a bit off the back of the keyframe also.
>
>Ron O.
>
>
>--
>OVERS PIANOS - SYDNEY
>    Grand Piano Manufacturers
>_______________________
>
>Web http://overspianos.com.au
>mailto:ron at overspianos.com.au
>_______________________
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20060901/ce866839/attachment.html