[pianotech] finding the strike line

[Ron Overs]

Hello all,

Gluing test hammers onto the shank is my preferred method to 
determine the optimum strike point. I prefer to fit test hammers 
slightly further out on the shank (2-3 mm) than the original hammer 
line (you may need to use new shanks for the purpose of fitting test 
hammers if you are planning to retain the original shanks). This 
allows you to test strike points further out than standard, without 
having to remove the dags. It is usual to test the first and last and 
two intermediate hammers for each of the top two treble sections. The 
action and key-frame assembly is moved in and out from the standard 
position, as normally determined by the touch block guides, until the 
required strike adjustment for each test hammer has been determined 
and recorded. The adjacent new hammers are then glued on their shanks 
at the adjusted strike length. Pencil lines are previously drawn onto 
the strike points of all test hammers and their adjacent hammers to 
facilitate accurate placement of the adjusted hammer position. The 
test hammers are not removed until all adjacent corrected hammers 
have been fitted.

Ron O.
-- 
OVERS PIANOS - SYDNEY
    Grand Piano Manufacturers
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Web http://overspianos.com.au
mailto:ron at overspianos.com.au
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