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

["wa6fwf" <wa6fwf@xxxxxxxxxxxxx>]

Hi Greg,
   Actually you need to measure the current while it is moving,  then if it drops a little then its a jam, if it goes to zero then 
its the limit switch.

I know this goes against reasoning, you expect a locked motor to pull more current, but these are split winding AC motors with a 
capacitor and they act differently.

This is also why when you get a cable snag you burn up the motor or the transformer or both before you blow the fuse, that fuse I 
think just saves you from a mis-wired or shorted cable.

73
Kevin WA6FWF


----- Original Message ----- 
From: "Greg D." <ko6th_greg@hotmail.com>
To: <mail@hatzakis.net>; <amsat-bb@amsat.org>
Sent: Thursday, January 01, 2009 5:58 PM
Subject: [amsat-bb] Re: G-5500 stuck problem


>
> 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
>

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