MDM Trouble Report for 2014 Feb 10

Telescope: 2.4m
Observer(s): Halpern (Columbia)
Instrument: OSMOS

Problem(s) Encountered:
Everything seems to be okay now.  But at around 1:45am there
was some kind of glitch that caused a small jump of the telescope,
corrupted the TCS computer, and stopped every encoder from
reading, including telescope coordinates and dome azimuth.
It seemed to be a power glitch, as my computer monitors blinked
off for a couple of seconds. But the UPS should have handled
that, so I'm  not sure what happened. I had to turn off auto
dome to get the dome to stop marching around, one degree at a
time.  I couldn't shut down the TCS program normally, because
the shutdown prompt didn't respond to the mouse click. I had to
power cycle the TCS computer, which may mean that the TCS data
was left an incorrect state when the program came back up.
I had to do some scrambling to prevent the telescope
from running away.  The dome either oscillated or stepped
around until the dome error started reading accurately.
The telescope focus motor had moved way out of focus,
and the new encoder reading is about 145 lower
than before.  Recovering the pointing was the easy part,
but all of this lost about 2 hours.


------------------------------

Submitted on 2014 Feb 11 [4:54:44]
NOTE: This trouble report replaces the previous report for 2014 Feb 10