[GreenKeys] ASR LMU12 Motor

[Steve Garrison]

OK, folks what can go wrong with a synchronous motor that can make it seem
to be turning at a much higher RPM than it should be?

 

I had a mishap that shorted a wire against the motor that caused a spark, a
pop, and the fuse in the LESU blowing.  After removing the short, replacing
the fuse, then powering back up, the machine was running but "sounded
funny!"  After removing the typing unit and powering backup I still had the 
"funny" sound, just not quite as loud.  Without the typing unit it was just
the motor and the reperf churning.  The TD drive shafts had been removed
earlier.

 

My feeling is the "funny" noise is the mechanisms running at a higher RPM
than designed.

 

I still need to repair the shorted wire, but it isn't part of the motor
circuit anyway.

 

Steve G./N4TTY

 

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