Yamaha C3 regulation

[Mark Cramer]

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Lance,

you've already mentioned the rep. springs are fine, but I have to ask how
they are in relation to the flange pinning?

IOW, though hammer-rise may look fine, could overly-tight springs be
concealing some "factory-fresh" flange-pinning?

I will add Ed Foote's clever tip to my bag of tricks. However, must say with
Yamaha in particular, I've often found it difficult to adjust the balancier
height by feel (which is my preference).

In my experience, good spring-strength a given, the jacks don't return well
with the wink test, no matter the balancier height. Although they work just
fine under actual playing conditions. (and this is of course is another
topic)

The combination of excess drop and rep. spring-strength is the most frequent
cause of resistance at escapement I run into.

Hope you return from your service call with the problem solved!

Mark Cramer,
Brandon University

  -----Original Message-----
  From: caut-bounces@ptg.org [mailto:caut-bounces@ptg.org]On Behalf Of
llafargue
  Sent: Wednesday, July 28, 2004 8:17 AM
  To: 'College and University Technicians'
  Subject: RE: Yamaha C3 regulation


  I’m headed back to the piano to check more carefully.  The backchecks aren
’t doing it.  On after touch; I tried raising the glide bolts to see if that
affected it, but no. Thanks, I’ll post later today.



  Lance Lafargue, RPT

  LAFARGUE PIANOS

  New Orleans Chapter, PTG

  985.72P.IANO

  llafargue@charter.net



  -----Original Message-----
  From: caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] On Behalf Of
llafargue
  Sent: Tuesday, July 27, 2004 9:23 PM
  To: caut@ptg.org
  Subject: Yamaha C3 regulation



  List,

   I have a customer with a Yamaha C3 that’s 4 years old.  It is like new,
very slight knuckle/hammer wear, but really good shape.  I have regulated it
and everything seems great except that the let-off bump feel seems excessive
and I can’t figure out why, on this C3.  I have lubed everything, knuckles
with Teflon, McLube to all key pins, whippen/jack tops, etc, but when the
jack lets off, you really feel it.  Also, when playing pianissimo, at the
point of let-off, there is a definite wall that you hit and it actually
prevents some notes from releasing.  I am wondering what aspects of
regulation affect this.  Or is there something else I am missing?  Let-off
is about 1/8” to 1/16” graduated, drop a little more than that, checking is
close; rep springs are not too strong.  Knuckle and jack top shape seem
normal.  Thanks.



  Lance Lafargue, RPT

  LAFARGUE PIANOS

  New Orleans Chapter, PTG

  985.72P.IANO

  llafargue@charter.net




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