Bergman upright action problems

[Carl Meyer]

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I had a problem with a console piano that was similar.  I put small =
jiffy leads on the back of the keys.  Solved the problem.   BUTTTTT, now =
several years later I think it may have been tight action centers on the =
whippen.  Since it obviously worked when new, I doubt that drying out of =
the keys would cause that much of a problem, but if the whippen flange =
were creating drag the whippen would not be free enough to push the back =
of the key down.  Just a few grams of friction would cause that problem.

Carl Meyer PTG assoc
Santa Clara, Ca.


  ----- Original Message -----=20
  From: Pierre Gevaert=20
  To: Pianotech=20
  Sent: Thursday, March 24, 2005 12:59 PM
  Subject: Re: Bergman upright action problems


  En principe c'est possible  Pierrot
    ----- Original Message -----=20
    From: Piannaman@aol.com=20
    To: pianotech@ptg.org=20
    Sent: Wednesday, March 23, 2005 7:39 AM
    Subject: Re: Bergman upright action problems


    Bruce,

    The problem is that there is too much weight in the front of the =
keys for the weight of the action and spring tension combined to push =
the key back into place no matter how much lost motion I take out of it =
(I removed all I should have needed to and then some).  This is not a =
garden variety regulation problem, unfortunately. =20

    Dave Stahl

    In a message dated 3/22/05 9:13:14 PM Pacific Standard Time, =
justpianos@our.net.au writes:
      Hi,
      Missed the first part of this message, so this may be irrelavent, =
but assume=20
      this is an upright.
      Hence hammers should not be of the rail at all, and jacks should =
not have to=20
      force themselves under hammer butts as a gap should exist for =
this. Even in a=20
      grand the jack doesn't support the hammer roller, so regulation is =
at fault.
      Bruce Browning - The Piano Tuner




      Piannaman@aol.com said:

      > Some pianos should just never be made....
      > =20
      > I think these are made in the Chinese Young Chang plant.  They =
look =20
      > suspiciously like those little 107 jobbers that break jack =
springs from=20
      time to  time.
      > =20
      > First ("free") tuning presented a plethora of problems(Am I =
almost as =20
      > allitertive as Alan:-).  The hammers were a good half inch off =
the rail, =20
      keys were=20
      > tight, yada, yada, yada....
      > =20
      > The REAL problem was that the keyboard is so poorly weighted =
that there  is=20
      > so much downweight in the black keys at either end of the  =
keyboard that=20
      the=20
      > action weight and springs can't hoist them back into  position, =
with damper=20
      > pedal on or off.
      > =20
      > I didn't take readings, but I could feel huge weight differences =
from  one=20
      > key to the next.  After everything was regulated as well as  =
possible, keys=20
      > eased, keypins lubed, the jacks still could not force their  way =
back under=20
      the=20
      > butts, despite a healthy dose of teflon powder...
      > =20
      > I stretched the jack springs to increase tension, though if  I =
had time I'd=20
      > have replaced them with stronger ones.  This seemed to get  the =
thing to=20
      > function.
      > =20
      > Short of pulling leads out of the fronts of the keys, any other =
ideas =20
      > helping this action?
      > =20

      >=20


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