[NSRCA-discussion] Servo Signals

Sun Jun 21 04:32:34 AKDT 2009

HMMM!!! Better servos in general always a better way to go. On the 
other hand, how much better do we really from today's standard top of 
the line stuff? Unlike the radio link advances, I am not too sure that 
any "better" in the elctromechanical link will result in much real 
gain. All of the extra servo capability may not be able to fly your 
model any better. No matter how you slice and dice it, unless there is 
a paradigm shift in our event's management, it will still be at the 
mercy of the loose screw in front of the control

MattK

-----Original Message-----
From: Phil Spelt <chuenkan at comcast.net>
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Sent: Sun, Jun 21, 2009 7:15 am
Subject: Re: [NSRCA-discussion] Servo Signals

Yea, Richard, "Dream on, dream on, Teenage
Queen..." to quote a pop song from the '60s/'70s/???

On second thought, here's your chance for 15 minutes in the
spotlight!  Get to work...

At 09:02 PM 6/20/2009, you wrote:

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......

Richard

From: Richard Lewis
&lt;humptybump at sbcglobal.net&gt;

To: General pattern discussion
&lt;nsrca-discussion at lists.nsrca.org&gt
;

Sent: Saturday, June 20, 2009 7:51:32 PM

Subject: Re: [NSRCA-discussion] Servo Signals

More accurately it is a pulse position signal.  The RX sends a
beginning pulse that the RX recognizes and then a position pulse at a
later time.  The time between the start pulse and the position pulse
is the absolute position that the servo is commanded to move to.

Link to a tutorial:

http://www.hooked-on-rc-airplanes.com/servo-tutorial.html

Richard

From: Ed White
&lt;edvwhite at yahoo.com&gt;

To: General pattern discussion
&lt;nsrca-discussion at lists.nsrca.org&gt;

Sent: Saturday, June 20, 2009 11:52:22 AM

Subject: Re: [NSRCA-discussion] Servo Signals

Its pulse width modulation.  The pulse length varies from roughly
1.0 millisecond to 2.0 milliseconds in length, with center at roughly 
1.5
msec.  For a typical radio, the pulse is repeated about 50 times per
second or about once every 20 msec (though this can vary quite a
lot).

Ed

From: Jay Marshall
&lt;lightfoot at sc.rr.com&gt;

To: nsrca-discussion at lists.nsrca.org

Sent: Saturday, June 20, 2009 10:12:24 AM

Subject: [NSRCA-discussion] Servo Signals

Iâ€™m sure everyone knows the
answer to this – but me. Is the control signal sent from the receiveer 
to
the servos analog or a pulse width controlled signal?

Jay
Marshall

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Phil Spelt, Webmaster & Past President,
Knox County Radio Control Society, Inc.

       URL:

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AMA--1294,  Scientific Leader Member, SPA--177

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