make it heavier

[David Love]

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You need to asses first why the action is light.  If you changed the s/f =
knuckle radius from the original, say from a 16 to a 17 mm, then you may =
now have excess lead in the keys.  If you put on a hammer that is very =
light then you might want to take a different approach.  In order to =
decide what the best route is there needs to be more information.  Take =
sample readings of strike weights, front weights, hammer weights, up and =
down weights from representative keys through the keyboard.  How does =
the action regulate?  Is the blow and dip within normal specs?  The =
problem may be a simple act of removing some lead from the keys.  Or, as =
Richard mentioned, increasing the hammer weight.  You can quickly and =
easily increase the hammer weight by attaching small binder clips to the =
shanks.  The farther out toward the hammer you place them, the more =
weight you will add.  On the other hand, if the action has been set up =
with too much mechanical advantage (for example a 17 mm knuckle combined =
with a .49 key ratio, you may need to look at other solutions such as =
moving the capstan). But you really need to get (or give) more =
information in order to analyze the problem correctly.

David Love

----- Original Message -----=20
  From: Wimblees@AOL.COM=20
  To: Pianotech@ptg.org ; caut@ptg.org=20
  Sent: February 06, 2002 12:31 PM
  Subject: make it heavier


  I just got done regulating a Steinway O, (1930's vintage). It has new =
h.s.f., keys rebushed, etc. But the down weight is less than 40 g. One =
piano major has already complained=20

  I should probably know this, but how do I make the action heavier?=20

  Wim=20

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