<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;}
@font-face
{font-family:"Brush Script MT";
panose-1:3 6 8 2 4 4 6 7 3 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
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:.2in .25in 33.1pt .25in;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body 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'>I remember from my days in control systems
theory that the analog computers were faster and more accurate than the </span></font><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>IBM</span></font><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'> big iron computers. Analog
pots are still cheaper, lighter, and higher resolution than digital encoders –
as long as they are clean…</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><b><i><font size=4 color=navy face="Brush Script MT"><span style='font-size:
13.5pt;font-family:"Brush Script MT";color:navy;font-weight:bold;font-style:
italic'>Jay Marshall</span></font></i></b><font color=navy><span
style='color:navy'> </span></font></p>
</div>
<p class=MsoNormal 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>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Bob Richards<br>
<b><span style='font-weight:bold'>Sent:</span></b> Saturday, </span></font><font size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>June 20, 2009</span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> </span></font><font size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>10:24 PM</span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'><br>
<b><span style='font-weight:bold'>To:</span></b> General pattern discussion<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion]
Servo Signals</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=960
style='width:8.0in;margin-left:.5in'>
<tr>
<td valign=top style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>--- On <b><span style='font-weight:bold'>Sat,
6/20/09, Richard Lewis <i><span style='font-style:italic'><humptybump@sbcglobal.net></span></i></span></b>
wrote:</span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'> </span></font></p>
<div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>And....Interestingly enough.....It does not matter
what kind of fancy whopping digital super latest and greatest TX/RX system
you have, the signals to the servos are still firmly rooted in good old
1970's technology....:) And...Your super whopper digital brushless
whatever servo still has an analog pot for position feedback....:)</span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I for one am eager to see a leap in servo
technology.....Bidirectional serial comms to the servos with the servo
being able to feed back torque, amps, position, rate, etc.....and
encoder/resolver position feedback in the servos to really catch up with
the world we live in......</span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
</div>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Amen to that. We have digital servos
and digital receivers, yet they talk to each other via an analog method
and use analog feedback.</span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
</div>
</td>
</tr>
</table>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
</div>
</body>
</html>