[amsat-bb] Re: G-5500 stuck problem

Greg D. ko6th_greg at hotmail.com
Thu Jan 1 17:58:34 PST 2009

To differentiate between a stuck gear or the limit switch (or similar), can you measure the drive current going to the rotor?  If it goes up at the 180 mark, it's a jam; if it goes to zero, it's the limit switch.

Also, what does the controller's meter indicate?  Maybe it's shutting it down for some reason.

Greg  KO6TH

> From: mail at hatzakis.net
> To: amsat-bb at amsat.org
> Date: Thu, 1 Jan 2009 14:10:41 -0800
> Subject: [amsat-bb]  G-5500 stuck problem
> Have a G-5500 and suddenly the rotor stops moving clock-wise past 180.  I
> stood under it and it makes no particular noises at that point, just stops
> perfectly at 180.  Was working the day before and flawlessly for the last 4
> years.  
> It stops so quietly, it almost sounds like the limit switch or the
> controller is stopping the motor.  The elevation works perfectly and the
> rotation works fine from zero to 180.  If it were a bad gear or something
> like that, I would expect it to grind or make some funny sounds
> It is a royal pain to take the thing down; any ideas on debugging without
> taking the thing down?
> Michael
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