Re: [amsat-bb] G-5500

["Ben" <b-fisher@xxxxxxxx>]

I just bought a G-5500. I don't have it up yet, but I did study the
schematic. There is no provision for speed control. I suspect these things
are poor auto trackers. In order to stay fixed on a moving target it would
become necessary to pulse the motors. I can see where these things would
exhibit jerky motion. I've thought about designing a better system using
servos or stepper motors with optical encoders for position feed back. With
the proper software interface it would be easy to track a satellite with a
smooth motion of the antenna system. I'm sure its already be done but by
who?
Ben K9BF
----- Original Message -----
From: "Joe Cutchin" <forcep@intercom.net>
To: "amsat-bb" <amsat-bb@AMSAT.Org>
Sent: Sunday, December 08, 2002 3:20 PM
Subject: [amsat-bb] G-5500


> Any ideas? The "voltage adjust" figure which should be around 250-255
> when running rotator setup under Wisp, both for el and az is unstable
> and fluctuating. It is not staying fixed at 254.Thus rotator is jerking
> and not stable either.I'm learning to hate Yaesu rotators.Your comments
> appreciated. 73 Joe W3ETT
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