[pianotech] (no subject)

[Gerald Groot]

Specs do help.  They give us something to go by.  So, if you can, start with
that but, they are not always exact.   They are a reference point.  

 

Regulating by the seat of your pants is adjusting things to make that
particular piano achieve its highest level of performance outside of what
the specs might call for.  Say, maybe, a tad less or more after-touch on a
grand for instance or, a closer back check distance.  Perhaps a wee bit more
key dip or, instead of 1/8" let off, regulate it according to what feels
best for that piano etc..  

 

Some vertical models might require a bit more let off to prevent blocking on
a harder blow.  Lots of variables possible within tolerance levels.  

 

When I regulate a grand, I set let-off in the piano as precisely as I can on
all of the end hammers before I remove the action and then use that let-off
as my guide on my bench for the required let off height for the rest of
them.  I do this by lowering my jig to match the exact height of the preset
let off position for the two set end hammers.  Then, I can very easily and
quickly regulate all the rest of the let off in that section to just barely
touch the jig and then I regulate the drop.  Of course, I've filed the rest
of the hammers before hand and have set key height as well.  

 

I also lower the job for setting my hammer line to get a nice even line
which I have also set before I remove the action from the piano on the same
end notes.  

 

I do not file the end hammers or clean and burnish anything on these
pre-adjusted notes until I'm finished regulating the rest of the action.  It
works pretty well for me.  Once the action is back in the piano, I check
everything to make sure it is where it should be and it is usually very
close.  

 

When I level keys on a vertical, I set one note to exactly where I want it
to be.  Maybe the hammer line requirements are a tad closer to the string
or, further away than what the actual spec calls for.  I'll fool around with
it until I get the desired results for the hammer line, key height, let off
etc.  I do it by "feel."  What feels best for that piano.  What gives it the
best performance and action.  

 

That's one way anyway..  

 

Jer Groot RPT

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of RONALD SHIFLET
Sent: Saturday, April 04, 2009 11:24 PM
To: Pianotech
Subject: [pianotech] (no subject)

 

I'm searching the archives looking for a post about letting the piano tell
you how to regulate it. I'm working on a Samick SG-150.
 
I've always regulated by specs and have had real good success. I've heard
for 20 years that letting the piano tell you how to regulate it will achieve
a better regulation.
 
Any ideas on how to do it?
 
thanks
 
Ron

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