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--></style><title>[CAUT] Digest, Vol 1103, Issue 85 Moving Wippen
Rail</title></head><body>
<blockquote type="cite" cite><font face="Arial"
color="#000000">consider this: A right
triangle</font></blockquote>
<blockquote type="cite" cite><font face="Arial" color="#000000">Short
arm = jack center to jack tip.</font></blockquote>
<blockquote type="cite" cite><font face="Arial" color="#000000">Long
arm = knuckle core to hammer molding center line</font></blockquote>
<blockquote type="cite" cite><font face="Arial"
color="#000000"
> <span
></span> (line drawn
parallel to shank from jack tip)</font></blockquote>
<blockquote type="cite" cite><font face="Arial"
color="#000000">Hypotenuse = optimum spread?</font></blockquote>
<blockquote type="cite" cite><font face="Arial"
color="#000000"><br></font></blockquote>
<blockquote type="cite" cite><font face="Arial" color="#000000">Or is
this triangle measured to shank center. I don't have the time
now to</font></blockquote>
<blockquote type="cite" cite><font face="Arial" color="#000000">look
into this. Just a passing thought.</font></blockquote>
<div><br></div>
<div>I tried it this morning on a Samick which I'm trying to get the
inherent friction down.</div>
<div>Filing, tapering and squaring the tails brought the touchweight
down but not too much</div>
<div>the friction. BTW Jack was buried into rep stop felt.</div>
<div><br></div>
<div>Action spread was good with 17 mm knuckle radius. Moved the stack
back 3mm</div>
<div>to improve Strike point, dropped BW but not friction. This also
involved moving the</div>
<div>frame forwards and rehanging hammers 51-88 90 degrees to the
shanks since they</div>
<div>were pitched back and understriking. Also shimmed up stack 1.5
mm.</div>
<div><br></div>
<div>Next endeavor to reduce friction: move knuckles out 1 mm to 18
mm.</div>
<div>Relocate wippen rail for knuckle core/jack center
alignment.</div>
<div>Regulates well with spread at 114.2 mm.</div>
<div>The friction dropped to normal or below levels. +
+</div>
<div><br></div>
<div>I also checked the 'right triangle' aspect. It didn't work
measuring jack center to tip</div>
<div>but did to shank center. I guess it confirms my spread
selection. Next time, I'll use</div>
<div>this as a start and see where everything lines up.</div>
<x-sigsep><pre>--
</pre></x-sigsep>
<div><br>
Regards,<br>
<br>
Jon Page</div>
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