Shutter Issue

We are trying to diagnose a problem with the shutter that is causing the breakers
to trip on panel N. Please read the following note from Rich. If there is a chance
for precipitation then please take pictures of the shutter if you have a phone
with a camera.

Email from Rich
Folks,

Ted and I have discussed this and we agree that the problem relates to
the motor starting relay pulling in inappropriately.  It is not clear
why that is happening.  It could be because of an electrical failure in
the motor (shorted windings?) or it could result from mechanical load on
the motor.

We think it is important to know the exact point at which the dome fails
so we are going to ask observers to leave the dome alone when it stops,
weather allowing.  In that event please file a report to

72status@lowell.edu

so we can photograph the shutter, make measurements, and then get the
dome closed.

I will post notes to that effect at the shutter control switches and the
circuit breaker box.

Thanks for your cooperation,
Rich
.
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-- Main.BrianWTaylor - 30 Apr 2008

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