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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Scott,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Put a bunch of trim or subtrim in on the
servo and see if the buzzing decreases. If not, leave the servo off center,
then shift the trim/subtrim on another servo. Keep doing this until you’ve
moved all servos off center. If at any point the buzzing stops, you have an
indication which servo is causing the problem. A servo that settles down when
offcenter is just a servo that has substantial wear at the center of the pot.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Another easy check is to use the slow
sweep servo test mode (if you radio has the function, Code 75 on the 10X). If
the sweep speed (stops, jitters, speeds up, slows down) of the servo changes as
it passes through center, the pot is worn.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I have seen instances where a single bad
pot appeared to cause “synmpathy” jitters in other servos. Don’t
overlook the throttle servo – they often have worn spots in the pots at
full or idle, or anywhere inbetween where a particularly nasty resonance may
exist with the airframe/engine/mount/linkage.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dave<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
nsrca-discussion-bounces@lists.nsrca.org [mailto:nsrca-discussion-bounces@lists.nsrca.org]
<b><span style='font-weight:bold'>On Behalf Of </span></b>Scott Pavlock<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, June 16, 2006 7:32
PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">NSRCA
Mailing List</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion]
Interference Problem</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>I'd be quick to say that
was the problem, but there's still the odd buzz in each of the servos under no
load.<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><span class=gmailquote><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>On 6/16/06, <b><span style='font-weight:bold'>Jay
Marshall</span></b> <<a href="mailto:lightfoot@sc.rr.com">
lightfoot@sc.rr.com</a>> wrote:</span></font></span><o:p></o:p></p>
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<p><font size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial;color:navy'>Reminds me of a problem I once had with servos. Had one that
was PARTIALLY bad. If you did a normal control check all was well. However, it
you moved the servos slowly to max they would go ape at some point and short
the battery and therefore taking out ALL of the servos and receiver.</span></font><o:p></o:p></p>
</div>
<div><span id="q_10bdf18bf090040f_1">
<p><font size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial;color:navy'> </span></font><o:p></o:p></p>
<p style='margin-left:.5in'><font size=2 face=Tahoma><span style='font-size:
10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> <a
href="mailto:nsrca-discussion-bounces@lists.nsrca.org" target="_blank">nsrca-discussion-bounces@lists.nsrca.org</a>
[mailto:<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org"
target="_blank">nsrca-discussion-bounces@lists.nsrca.org</a>] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Scott Pavlock<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, June 16, 2006 6:52
PM<br>
<b><span style='font-weight:bold'>To:</span></b> NSRCA Discussion List<br>
<b><span style='font-weight:bold'>Subject:</span></b> [NSRCA-discussion]
Interference Problem</span></font><o:p></o:p></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Hopefully someone can help with this. I have been
getting interference on my Focus for the past three flights causing me to land,
and I can't seem to solve the problem. Initially I thought it was the RX and
TX, so I changed them both and moved to an entirely different frequency. I flew
the plane again and it glitched in the air just as the first two times. The
glitch is a quick and significant change in attitude. When I landed, the
regulator was warm so I removed it thinking it was going bad. I replaced it
with a regular 4 cell NiCd pack. I changed the receiver once again and am still
getting the glitch. I decided to remove all the arms from my servos (JR
Digitals) so that there would be no load and see how the problem is. The
servos, under no load, buzz considerably. It's not the "I'm under
load" type buzz, but more of a twitching, crackling type buzz. Are my
servos going bad? When I plugged in a new 8417, the buzz is non existant in
that servo. <br>
<br>
Any help would be appreciated!!<br>
<br>
Scott<o:p></o:p></span></font></p>
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