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<DIV><FONT face="Bookman Old Style">Paul, and list,</FONT></DIV>
<DIV><FONT face="Bookman Old Style"></FONT> </DIV>
<DIV><FONT face="Bookman Old Style">I think I'm starting to get a grip =
on
it. My suspicion now is that the arc is perhaps to large and needs =
to be
sanded down. I think this because of the fact that the =
</FONT><FONT
face="Bookman Old Style">hammers do not increase in friction when =
pushed through
the backchecks, regardless how I alter the angle of the head. =
Sometimes it
seems that there is some improvement with head angle change, but not
significant, or consistent. Suggestions on tightening this arc? (I =
know, I
know, someone already posted a suggestion, but it has gone away =
from my
'puter.</FONT></DIV>
<DIV><FONT face="Bookman Old Style"></FONT> </DIV>
<DIV><FONT face="Bookman Old Style">One other issue that I'm still not =
convinced
is not part of it, is the jack to knuckle placement. There is =
still plenty
of room in the window to allow for more aftertouch, and thus more =
clearance of
the jack from the knuckle, but I already have about .055" of aftertouch
(measured by placing .055" of punchings on top of front rail felts and =
seeing
that escapement just barely occurs when the key is depressed). I =
hesitate
to think that more aftertouch would be appropriate. Oh yeah, I =
forgot, I
tried increasing it last night, and it didn't improve checking =
anyway.
It's late. I don't like it, but it seems the jack does get bumped =
out of
the way a little bit by the knuckly before checking, but I'm at a loss =
as to how
to solve this. As I said, the jacks really can't be moved farther =
forward,
and increasing aftertouch does not seem to help.</FONT></DIV>
<DIV><FONT face="Bookman Old Style"></FONT> </DIV>
<DIV><FONT face="Bookman Old Style">Also, these are new wippens, =
repinned upon
arrival at 5-7g. Hammer shanks also repinned on =
arrival.</FONT></DIV>
<DIV><FONT face="Bookman Old Style"></FONT> </DIV>
<DIV><FONT face="Bookman Old Style">Thanks again,</FONT></DIV>
<DIV><FONT face="Bookman Old Style">William R. Monroe<BR>Madison,
WI<BR>Assoc.</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>
<A title=pmc033@earthlink.net =
href="mailto:pmc033@earthlink.net">Paul
McCloud</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A =
title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">Pianotech</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, November 10, =
2004 9:15
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: About =
Checking</DIV>
<DIV><BR></DIV>
<DIV>Hi, William:</DIV>
<DIV> If your hammers don't find increased =
friction
when you push them down into check, your angles may not be =
correct.
If you take a wedge shaped block and force it into a crack, you'd =
expect it to
get tight, right? The tail is arc-ed in a radius =
which is
less than the radius of the hammer shank length, so that when the tail =
meets
the backcheck, it acts as a wedge. It's possible that the radius =
arc of
your tails is too long (you may need to sand a tighter curve into =
them).</DIV>
<DIV>The backcheck is bent so that the tail will be caught in =
it. The
movement of the keystick is also in an arc which intersects the =
arc of
the hammershank. The movement of the hammer and keystick and =
their arcs
causes them to meet and interfere with each other (a good =
thing!).
Where these two arcs intersect should be around the middle of the =
backcheck head. The bottom of the backcheck should be closer to =
the
hammer, and the top should be farther away (this is your backcheck
angle) This angle insures that the tail finds more =
friction as
it goes down into it. It sounds like your backcheck angle is
insufficient to cause this to happen. See if you can angle the =
backcheck
back a little, and regulate the backcheck height again, while making =
sure it's
not rubbing on the tail on the way up. </DIV>
<DIV>It's too bad we can't see the action up close. Sounds like =
a good
subject for a Guild meeting/demo.</DIV>
<DIV>Hope this helps,</DIV>
<DIV> Paul McCloud</DIV>
<DIV> inSaneDiego</DIV>
<DIV> </DIV>
<DIV></DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid">
<DIV style="FONT: 10pt Arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>
<A title=A440WRMPiano@tm.net =
href="mailto:A440WRMPiano@tm.net">William R.
Monroe</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To: </B><A =
title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">Pianotech</A></DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> 11/10/2004 6:15:31 AM =
</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: About =
Checking</DIV>
<DIV><BR></DIV><FONT size=2>
<DIV><FONT face="Bookman Old Style" size=2>Joe Garrett, =
</FONT></DIV>
<DIV><FONT face="Bookman Old Style" size=2>I have already bedded =
the
keyframe, and double checked to make sure.</FONT></DIV>
<DIV><FONT face="Bookman Old Style" size=2></FONT> </DIV>
<DIV><FONT face="Bookman Old Style" size=2>Tom,</FONT></DIV>
<DIV><FONT face="Bookman Old Style" size=2>Already repaired the =
balance rail
holes (Onesti system - great tool!).</FONT></DIV>
<DIV><FONT face="Bookman Old Style" size=2></FONT> </DIV>
<DIV><FONT face="Bookman Old Style" size=2>Joe Goss, and =
Paul,</FONT></DIV>
<DIV><FONT face="Bookman Old Style" size=2>Rep Springs really =
don't seem too
strong, they have definite rise, but do not "jump-up" from =
check. I
will try weakening them more, though, and see what that
brings.]</FONT></DIV>
<DIV><FONT face="Bookman Old Style" size=2></FONT> </DIV>
<DIV><FONT face="Bookman Old Style" size=2>Terry F,</FONT></DIV>
<DIV><FONT face="Bookman Old Style" size=2>Double checked jack =
position, by
bringing it out to the point of cheating, then just in enough to =
function,
and no change (Drat!).</FONT></DIV>
<DIV><FONT face="Bookman Old Style" size=2></FONT> </DIV>
<DIV><FONT face="Bookman Old Style" size=2>Paul,</FONT></DIV>
<DIV><FONT face="Bookman Old Style" size=2>Great ideas. =
Checks are
aligned, spaced, etc. I resurfaced them prior to =
regulation.
Checking occurs about 1/3 of the way into the backcheck, and =
backcheck
height is just about even or a little below the backcheck tail at =
drop,
checks do not rub on tails on the rise. The one =
thing that is
giving me concern is that when the hammer is in check and I push =
them
further into check, it does not happen. I can push the =
hammer
pretty much through the range of the backcheck without much =
increase in
friction. As as mentioned earlier, maybe the hammers being =
hung at a
different angle are to blame (if indeed that was done). I will =
be
checking that, but any other thoughts on why the hammers won't go =
deeper
into check?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="Bookman Old Style" size=2>Thanks everyone for =
your
input!!!</FONT></DIV>
<DIV><FONT face="Bookman Old Style" size=2>William R. =
Monroe<BR>Madison,
WI<BR>Assoc.</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- =
</DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>
<A title=joegarrett@earthlink.net
href="mailto:joegarrett@earthlink.net">Joe Garrett</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A =
title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">pianotech</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, November 09, =
2004
11:35 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: About =
Checking</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>William asked: "<FONT =
face="Times New Roman"
size=3>Also tried varying the backcheck height, which showed no
noticeable<BR>improvement with either higher or lower =
backchecks.
Also tried changing the<BR>backcheck angle - again no improvement =
one way
or the other, hammers simply<BR>will not check on soft =
blows."<BR><BR>Lost
in Wisconsin:<BR>William R. Monroe<BR>Madison, =
WI</FONT></FONT></DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman"
size=3></FONT></FONT> </DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman"
size=3>William,</FONT></FONT></DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman" =
size=3>If you've
tried all of that, then it has to be something you didn't =
try.<G>
Have you checked to see if the keyframe is bedded properly? I've =
known
that to mess up checking.</FONT></FONT></DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman" =
size=3>Best
Regards,</FONT></DIV>
<DIV><BR></DIV></FONT>
<DIV><FONT face=Arial size=2>Joe Garrett, R.P.T.<BR>Captain, =
Tool
Police<BR>Squares R
I</FONT></DIV></BLOCKQUOTE></FONT></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML=
>