vertical damper springs

[Meyer Carl]

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Damper adjustment is a real RPT job  (royal pain in the tush).

Here is a procedure I read about in the AMICA bulletin (automatic =
musical instrument assoc.)
This is basically the way I've been doing it.

After adjusting the wires for good damping and uniform lift from the =
pedal, set a sample spoon at the beginning and end of each section in =
the piano.  Maybe better to set one in the middle as well since after =
the action is removed it may not be twisted the same as when bolted in.

Now with the action out, prop the hammer rest rail to approx half way to =
the strings.  Now wedge the damper lift rail till the samples when the =
wippen is raised moves the hammer and the damper simultaneously.  =
Basically the jack should touch the butt at the same time the spoon =
touches the damper lever.

If you are standing facing the back of the action  and the hammer moves =
before the damper, bend
the spoon towards yourself until they both move at the same time.  If =
the damper moves first, bend the spoon away from you.  A little bend =
goes a long way. =20

Check and correct the damper lift rod position at each sample so that =
the hammer and damper wink at the same time.  You'll come out quite =
accurate.

Decide before you start whether you need a lighter or heavier touch and =
choose the timing of the dampers accordingly.  A late damper will reduce =
the touch somewhat.

Happy spoon bending!!!!!

Carl Meyer




 Original Message -----=20
  From: Richard Brekne=20
  To: pianotech@ptg.org=20
  Sent: Thursday, March 01, 2001 3:06 PM
  Subject: Re: vertical damper springs


   =20
  "Kevin E. Ramsey" wrote:=20

    Richard brings up an interesting point, and one that I felt that was =
missing from this discussion; damper timing. I think that before you go =
to the trouble of regulating damper springs, you had better regulate the =
spoons first. I've seen situations where the touch was VERY uneven, =
until the spoons were regulated. Trouble is, everybody seems to hate =
doing that so much that it's usually the last thing that they try. After =
that, I would put the action in a cradle, pop the springs out to the =
side, and see how they line up. The really strong ones should stick out =
further than the rest. Am I all wet? Come one guys, let me have it. I'm =
a big boy.
  Sorry to have let this one lie... grin.. other er... issues seem to =
have taken control of the universe for a moment there... all is back in =
order now... me hopes anyways..=20
  In anycase.. I agree that many seem (myself included) to shrug away =
from regulateing damper spoons.. probably cus the darn things are hidden =
from view when doing this, as is usual (and neccessary ??) with the =
action installed. I questioned neccessary because I seem to remember =
seeing something about a jig and accompanying procedure for doing this =
job on the bench... anyone remember anything about this.. or know about =
it ??=20
   =20

  --=20
  Richard Brekne=20
  RPT, N.P.T.F.=20
  Bergen, Norway=20
  mailto:Richard.Brekne@grieg.uib.no=20
   =20


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