bobbling hammers-1993 Kranich&Bach

[Lance Lafargue]

Hi,
Yes, I forgot, the first thing I did was raise the rail which would help
the jacks to return.  I adjusted checking, letoff, etc.  The aftertouch is
tremendous!  (TOO DEEP now)  I want (I think) the jacks far away from the
butts. Consequently I've had to adjust checking within that window so that
I don't get blocking on some blows.  Thanks!  ANY ideas are appreciated...
Lance Lafargue, RPT
New Orleans Chapter
Covington, LA.
lafargue@iamerica.net

----------
> From: Zen Reinhardt <diskladame@provide.net>
> To: pianotech@ptg.org
> Subject: Re: bobbling hammers-1993 Kranich&Bach
> Date: Monday, February 02, 1998 7:08 PM
> 
> Hi Lance!
> 
> How's the aftertouch?
> 
> Did you try decreasing hammer blow distance and adjusting lost motion
> accordingly?
> 
> Cheap pianos have a way of defying traditional comfort zones because so
> little attention is paid to how well the action geometry will work. 
> Perhaps a more enlightened List Member can elaborate on this?
> 
> ZR!  RPT
> Ann Arbor  MI
> diskladame@provide.net
> 
> 
> 
> ----------
> > From: Lance Lafargue <lafargue@iAmerica.net>
> > To: Pianotech Listserve <pianotech@ptg.org>
> > Subject: bobbling hammers-1993 Kranich&Bach
> > Date: Monday, February 02, 1998 5:48 PM
> > 
> > Dear List,
> > I GIVE UP!  I've been trying to help a customer of mine who bought a
> cheap
> > Kranich & Bach (made in Europe, 1993, sold by Baldwin) 42" upright. 
This
> > piano had double striking or bobbling hammers when I first saw it.  To
be
> > brief and to the point; I added let-off distance and dip, still some
> > bobbling on soft blows, added more, still bobbling at times, then I
added
> > key height/dip, adjusted checking, and unless you are VERY deliberate
and
> > get to the very end of each key stroke, IT STILL DOES IT occasionally.
> > Maker won't help, they said (basically) that's what you get for buying
a
> > cheap piano.  Now, the piano is no fun to play and you still get the
> > occasional bobble if you're not careful.  
> > 
> > I have come across this problem hundreds of times over the years and
have
> > always been able to regulate it out, but I can't seem to get this one
to
> > stop without regulating it out of the comfort zone.  I remember some
> > Samicks and Yamahas in the low tenor had this problem due to the angle
of
> > the surface on the butt where the jack contacts.  Any ideas?  Thanks
very
> > much!
> > Lance Lafargue, RPT
> > New Orleans Chapter
> > Covington, LA.
> > lafargue@iamerica.net