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@hatzakis.net To: amsat-bb@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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