Setting strike point

[Dean May]

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If the action is all the way in against the dags you can slide a
screwdriver under the front of the action frame and pry up. This will
effectively move the strike point further in giving you just a little
more adjustment for trials. 
 
When listening at the breaks you are not listening for a "sweet spot"
like you hear on C88. What I hear are some trashy upper harmonics that
get better, almost like a voicing problem. There will actually be two
spots where it gets better. Pick the first one.
 
It takes a pretty hard hammer. The rebuilder I know who showed me this
technique has hammers specifically for adjusting the strike line. 
 
Dean
Dean May             cell 812.239.3359
PianoRebuilders.com   812.235.5272
Terre Haute IN  47802
 
-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf Of Jon Page
Sent: Thursday, January 26, 2006 7:50 AM
To: pianotech@ptg.org
Subject: Setting strike point
 
>From a practical perspective, what methods do you use for
>finding the aurally ideal strike point of individual hammers?
>How do you manipulate the hammer on the shank?
 
The top two treble sections are where the concerns lie.
Tack-glue a hammer on a shank using the originals for
guide at the ends of each section and maybe one in the
middle of the first section (killer octave).
 
Place pieces of masking tape on the key bed at these trial hammers.
(Have the tape go under the key frame).
 
Install the action and cheek blocks.
Draw a line on the tape at the edge of the key frame (sharp pencil).
 
With the treble block removed, play the note while moving the treble end
of the action slowly front to back. If the tone is better with the
action
relocated, place a line on the tape. Do this for each trial hammer.
(This assumes the action was situated properly to begin with).
 
The difference between the lines is the amount in which to relocate your
trials.
Relocate trials, verify. Don't be shocked if there is a curve to the
strike line.
 
Glue on the other hammers to these trial guides.
-- 

Regards,

Jon Page

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