<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 10 (filtered)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";
color:black;}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
p
{margin-right:0in;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman";}
span.EmailStyle17
{font-family:Arial;
color:navy;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body bgcolor=white lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Pinning the rep lever tighter allows for
speedier jack return as well as more positive hammer rise since the spring
doesn’t need to be set so close to the fail point. Most of the
benefit, in my view, comes from the speedier jack return and thus faster repetition.
</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<div>
<p><font size=2 color=navy face="Times New Roman"><span style='font-size:10.0pt;
color:navy'>David Love<br>
davidlovepianos@comcast.net<br>
www.davidlovepianos.com</span></font><font color=navy><span style='color:navy'>
</span></font></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;color:windowtext'>-----Original
Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> pianotech-bounces@ptg.org
[mailto:pianotech-bounces@ptg.org] <b><span style='font-weight:bold'>On Behalf
Of </span></b>Richard Brekne<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, June 21, 2007 4:38
PM<br>
<b><span style='font-weight:bold'>To:</span></b> pianotech@ptg.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Keep on filing...(picture
attached)</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>I dont think I understand
the logic behind this claim. Whatever friction there is at the lever pin
simply restricts the amount of movement of the lever for same spring
strength. I suppose more of the springs energy might be directed to jack
return... not really sure about this either when it comes to it.<br>
<br>
The rep lever springs upwards and downwards with equal strength regardless of
the tightness of the pinning. The only thing that can change the relative
pressure between up and down would be a repositioning of the pin... i.e.
changing its leverage moment.<br>
<br>
I would suspect, that 8-10 grams works well because it fits well with the
multi-tasking between the rep spring and other related parts... ie jack return,
hammer lift, appropriate friction levels for centers belonging to these...etc.<br>
<br>
Cheers<br>
RicB</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'><br>
Pinning the repetition lever to 8 grams restricts the jumpiness of the<br>
hammer on key release and directs more of the spring's energy into<br>
returning the key. When I'm doing a very careful regulation of a<br>
performance piano (where "it's so even" is the compliment I want to<br>
hear) I use an 8-gram weight I have that has a hole in the middle. If I<br>
put that weight on the screw that regulates the rep. lever's height (the<br>
short end of the rep. lever) I want the pinning tight enough that it<br>
holds the weight. When I place it on the drop screw pad (the longer end<br>
of the rep. lever) I want the lever to gently fall.<br>
<br>
dp</span></font></p>
</div>
</body>
</html>