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

[Greg D.]

Ha, really...  Thanks, I was "sure" it was the other way around.

So, if the current drops a little on a jam, why would it burn up either the transformer or motor?

Greg  KO6TH


> From: wa6fwf at sbcglobal.net
> To: amsat-bb at amsat.org
> Date: Thu, 1 Jan 2009 18:42:15 -0800
> Subject: [amsat-bb] Re: G-5500 stuck problem
> 
> 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 at hotmail.com>
> To: <mail at hatzakis.net>; <amsat-bb at 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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