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Re: Driving two rotor sets



 isnt it a lot easyer to use two alliance u110 rotors with the 500 ohm pot
in them? just put 5 volts to the top ground the bottom and use the wiper
as the sense lead. i do it here and its accurate to 2 deg. for a card to
put it to use a prairie digital model 30. quick clean simple and cheap.
nnnnn
Alan Bethel KE6QIS
grid CN70vs
e-mail ke6qis@yahoo.com
homepage http://homestead.juno.com/ke6qis
----- Original Message -----
From: "Howie DeFelice" <hdefelice@petrexintl.com>
To: "Jim White" <jim@coloradosatellite.com>
Cc: <amsat-bb@AMSAT.Org>
Sent: Friday, December 08, 2000 12:04
Subject: Re: [amsat-bb] Driving two rotor sets


> I think most of the controllers, including KCT use a 0 - 5 vdc signal to
> reference absolute position. This being the case, building a closed loop
> master/slave servo controller with a couple of op-amps should work. Use
the
> feedback voltage from the main (master) loop as the reference for the
> feedback (slave) loop and the systems should track. You could even add a
> unity gain opamp buffer to sum in an offset voltage to correct small
> calibration differences between the two system.
>
> Howie
> AB2S
>
>
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org


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